YC Winter 2015 (W15) companies
As of Apr 5, 2026, 111 companies · 214 founders
Winter 2015 at a glance
- 111
- 214
- 1.9
- 11
Most common tags
- SaaS13 · 12%
- Fintech8 · 7%
- Artificial Intelligence7 · 6%
- Machine Learning7 · 6%
- Marketplace7 · 6%
- AI6 · 5%
Where they are based
- SF Bay Area63 · 57%
- New York9 · 8%
- Los Angeles5 · 5%
- Toronto3 · 3%
Companies in Winter 2015
| What they do | Market | Founders | Links | ||
|---|---|---|---|---|---|
20n builds computational systems that predict DNA design for industrial biotech and therapeutic applications. Its platform applies machine learning, AI planning, and data mining to biological data, helping biotech firms engineer organisms for manufacturing fuels, materials, flavors, fragrances, and drug candidates. It replaces manual, trial-and-error approaches to metabolic pathway design, letting customers enter markets previously out of reach for biological processes. | Healthcare | 2 |
| ||
3dot develops new product and service concepts for partner companies, drawing on emerging technologies. Clients engage 3dot to generate, stress-test, and refine ideas before bringing them to market, replacing internal R&D brainstorming with an external think-tank team. | Consumer | 2 |
| ||
Akido Labs rebuilds healthcare infrastructure with AI at its core, aiming to make care anticipatory, precise, and accessible across income levels and geographies. The program description centers on using AI to replace reactive, fragmented care delivery with a system that gets ahead of patient needs. The current website content is a placeholder and does not confirm specific products, customers, or workflows. | Healthcare | 1000 |
| ||
Automate Ads builds software that automates and optimizes digital advertising campaigns for businesses. It unifies campaign management across channels, replacing the manual work of monitoring, adjusting, and coordinating ads by hand. | B2B | 2 | Not listed | ||
Bagaveev Corporation builds a small rocket designed to carry nanosatellites weighing 10 to 12 kilograms into low Earth orbit and Sun-synchronous orbit. The vehicle runs on 3D-printed aerospike engines across both stages, replacing conventional machined propulsion hardware. The target customer is the nanosatellite operator that needs a dedicated, affordable ride to orbit rather than a secondary slot on a larger launch vehicle. | Industrials | 2 |
| ||
Bankjoy builds end-to-end digital banking software for community banks and credit unions, covering mobile banking, online banking, account opening, loan applications, and conversational AI. It replaces legacy or patchwork digital banking systems with a unified platform. Products like JoyCompass add personal financial management tools to deepen member engagement beyond basic transactions. | Fintech | 60 |
| ||
Bizzy builds an automated marketing platform for e-commerce businesses. It centralizes customer data across all marketing channels and updates that data in real time as shoppers behave and campaigns run, then adjusts and executes campaigns automatically. The platform replaces manual campaign management and the patchwork of disconnected tools e-commerce operators otherwise juggle. | B2B | 2 |
| ||
Bluesmart makes app-connected carry-on luggage for frequent travelers. The bag replaces manual tracking and manual locking with built-in features: a GPS locator, a remote-controlled lock, a battery charger, and a digital scale. Travelers get real-time location data and device charging without carrying separate accessories. | Consumer | 51 |
| ||
Bonfire builds cloud-based procurement software for government and public sector teams, covering the full RFx and competitive bidding cycle from sourcing through supplier evaluation. It replaces manual, spreadsheet-driven bid management and fragmented eProcurement tools, letting procurement staff run projects faster while meeting strict compliance requirements. | B2B | 95 |
| ||
Booktrope built a team-based publishing platform connecting authors with editors, designers, and book managers to produce and sell print, ebook, and web titles. It replaced the traditional publishing pipeline by letting creative teams self-assemble and splitting book sale revenue among contributors rather than routing it through a conventional publisher. The company no longer operates. | B2B | 51 |
| ||
Bright sells residential solar to Mexican homeowners, replacing grid electricity bills with cheaper power and no upfront installation cost. Bright handles the financing and the software layer, then fulfills installations through a network of local contractors and distributors. The model targets a market with high electricity rates, abundant sunlight, and lower labor costs than the United States. | Industrials | 100 |
| ||
BuildScience builds Strata, a building management platform for commercial property owners and operators. It connects to a building's existing HVAC, lighting, and security hardware to consolidate real-time data into a single, mobile-friendly dashboard, replacing fragmented single-system monitoring tools. The platform is designed to reduce operational costs and improve tenant satisfaction without requiring significant new hardware. | Real Estate and Construction | 1 |
| ||
Chariot operates a private mass transit service for urban commuters, running shared shuttle routes as an alternative to personal cars and conventional public transit. Riders get fixed, predictable routes at lower cost than ride-hailing, replacing the frustration of driving or unreliable bus and rail service. Ford Motor Company acquired Chariot through its Smart Mobility division to anchor its urban mobility strategy. | Consumer | 501 |
| ||
Cinder designed and sold a countertop precision grill for home cooks, letting users set a target internal temperature and have the appliance cook meat to that exact doneness automatically. The device replaced the guesswork of stovetop and outdoor grilling, handling chicken, steak, fish, and other proteins without manual monitoring. Cinder ceased operations in June 2023. | Consumer | 2 |
| ||
Cleanly picks up, cleans, and delivers laundry and dry cleaning directly to consumers' doors, handling everything from wash-and-fold to dry cleaning, laundered shirts, and sneaker care. The service targets urban residents who want to skip the local laundromat or cleaner, replacing the trip, wait, and pickup with on-demand scheduling and 24-hour turnaround. | Consumer | 40 |
| ||
Cribspot built an online marketplace connecting college students with property managers to find and lease off-campus housing. It replaced the fragmented, manual process of searching listings and coordinating rentals near university campuses. The company operated from 2012 to 2018. | Real Estate and Construction | 2 |
| ||
CyberFend protects consumer-facing web and mobile applications against account takeover, stolen-credential abuse, and payment fraud. It analyzes login and payment transactions in real time, combining human cognitive science with machine learning to distinguish legitimate users from automated or fraudulent actors. The product replaces rule-based fraud detection for large e-commerce and payment operators. | B2B | 2 |
| ||
Dabble builds a virtual photo studio for e-commerce brands, using CGI and computer vision to produce product imagery. It targets online retailers who need high volumes of product photos, replacing the slow and costly process of traditional physical photo shoots. | B2B | 3 |
| ||
Dealyze builds digital rewards and referral programs for small brick-and-mortar retailers. Store owners use it to run targeted loyalty campaigns that track customer purchases and automate follow-up marketing, replacing paper punch cards and manual outreach. The product turns each in-store transaction into a structured retention touchpoint. | B2B | 6 |
| ||
Democracy Earth builds open-source, censorship-resistant voting and governance software for use wherever there is an internet connection. Its tools serve crypto networks needing on-chain governance, political activists operating under authoritarian conditions, and legislative bodies, replacing ad-hoc or paper-based collective decision-making. Deployments include governance infrastructure for blockchain networks, shadow referendums for activists in high-risk countries, and the first Quadratic Voting implementation in a U.S. state legislature. | Unspecified | 2 |
| ||
DemocracyOS builds an open platform that lets governments and citizens deliberate on and vote for political proposals online. It replaces closed-door policy processes with structured, peer-driven discussion and decision-making. The tool is aimed at public institutions seeking more transparent, participatory governance. | Government | 1 |
| ||
Direct Match builds an all-to-all electronic trading venue for US Treasury securities. The platform connects any market participant directly to any other, replacing the traditional dealer-intermediated model where buy-side firms can only trade through a small set of primary dealers. It targets institutional participants in the US government bond market. | Fintech | 11 |
| ||
eBrandvalue builds a social-data intelligence platform for brand marketers and CMOs. It analyzes social signals to forecast sales and market share weeks before traditional retail measurement data is available, replacing slow, backward-looking reporting with real-time competitive intelligence. Marketers use it to measure campaign ROI, track competitor positioning, and identify the consumer behavior shifts that drive category share. | B2B | 10 |
| ||
EquipmentShare rents, sells, and manages heavy construction equipment for contractors, combining a physical rental fleet with fleet-tracking software and hardware security products. The platform gives construction teams visibility into equipment location and utilization, replacing manual tracking and fragmented rental relationships. T3, its proprietary technology suite, connects job-site machines to cloud-based management tools. | Real Estate and Construction | 5400 |
| ||
Final built a credit card for consumers that replaced a single static card number with multiple automatically managed card numbers. Each number could be tied to a specific merchant, eliminating fraud exposure from data breaches and removing the disruption of a lost or stolen card. The card worked in-store, online, and with digital wallets without requiring changes to existing payment infrastructure. | Fintech | 11 |
| ||
Flip builds a mobile marketplace for rare, limited-edition, and hard-to-find sneakers, connecting buyers and curated sellers through 90-minute auctions. Buyers set their own price and receive instant notifications for drops they follow. Flip replaces informal resale channels and slower listing platforms with a fast, authenticated transaction guaranteed to close. | Consumer | Not listed |
| ||
GitLab builds a unified DevSecOps platform that covers the full software development lifecycle, from planning and source control through CI/CD, security testing, and compliance. Engineering, security, and operations teams use it in place of a patchwork of separate tools that require integration, manual handoffs, and context-switching. The platform gives all teams a shared codebase, pipeline, and data source so they can work in parallel rather than in sequence. | B2B | 2000 |
| ||
Giveffect builds an all-in-one SaaS platform for nonprofits that consolidates fundraising, donor and volunteer management, events, memberships, marketing, grant tracking, and CRM into a single system. It serves nonprofit teams that otherwise run their operations across multiple disconnected tools or spreadsheets, replacing that patchwork with one connected database and workflow layer. | B2B | Not listed |
| ||
GiveMeTap makes stainless steel, BPA-free reusable water bottles and donates 20% of revenue to fund clean water projects in villages across Ghana, Malawi, and Namibia. Each bottle also grants access to a network of cafes and shops that provide free tap water refills, replacing single-use plastic bottles for everyday consumers. Corporate partners commission co-branded bottles for staff, customers, and events, replacing disposable plastics while funding those same water projects. | Consumer | 1 |
| ||
Glassjar builds a shared expense manager for flatmates. It tracks household spending across a shared account, shows each person's individual ledger, and surfaces a dashboard summarizing balances and past payments. It replaces the manual back-and-forth of splitting bills and reconciling who owes what among people sharing a flat. | Fintech | 2 |
| ||
GroupAhead builds branded mobile apps for organizations, letting groups replace shared email threads and Facebook posts with a dedicated channel for member communication and event coordination. Each app is purpose-built for a single organization, giving members a focused space and push notification access that general social platforms do not provide. | Consumer | 2 |
| ||
GrubMarket builds e-commerce and software technology for the U.S. food supply chain, serving producers, distributors, and buyers whose procurement and logistics workflows run on manual, offline processes. Its platform digitizes ordering, inventory, and supply chain operations that food industry participants otherwise handle through phone calls, paper records, and spreadsheets. | B2B | 4548 |
| ||
HigherMe builds hiring and payroll software for restaurant and retail operators managing hourly workforces across multiple locations. It covers the full cycle from sourcing and applicant tracking through AI-assisted screening, paperless onboarding, and native payroll, replacing paper-based processes and disconnected point tools. The product was designed by a former multi-unit franchisee to cut the time and cost of filling high-turnover hourly roles. | B2B | 45 |
| ||
Industrial Microbes engineers microbes that ferment renewable feedstocks, such as ethanol and methane, into bio-based chemicals and materials. Its lead product is 100% bio-based acrylic acid, produced as a drop-in replacement for the petroleum-derived version used across industrial manufacturing. The process targets ethanol producers, acrylic acid producers, and consumer brands seeking to move their supply chains off petrochemicals. | Healthcare | 12 |
| ||
Instavest lets retail investors share their stock trades, including the ticker, share amount, and rationale, so that other users can mirror those positions. Traders who list their activity receive a share of any profits earned by followers who copy the trade, creating a direct incentive to publish quality analysis. The platform replaces informal tip-sharing and the guesswork of finding credible retail investors to follow. | Fintech | 2 |
| ||
Kickpay finances inventory for e-commerce companies, using the merchant's own sales and operations data to unlock credit that traditional lenders would not extend. Merchants pay for inventory only after it sells, removing the upfront capital burden that otherwise forces them to order conservatively or take on debt months before seeing any return. | B2B | 2 |
| ||
Labdoor independently purchases dietary supplements from retail stores, sends them to FDA-registered labs for chemical analysis, and publishes grades and rankings so consumers can identify products that meet their label claims for purity and potency. It replaces reliance on manufacturer marketing, celebrity endorsements, and unverified user reviews. Consumers can buy ranked products directly through the platform. | Consumer | 11 |
| ||
Level Frames sells custom framing online for art prints, posters, photos, vinyl records, and other works on paper, serving homeowners and office decorators who would otherwise visit a traditional frame shop. Customers upload images or submit artwork, choose a frame style, and receive a finished, framed piece shipped to their door. The service replaces the in-store custom framing process with a faster, lower-cost online workflow. | Consumer | 5 |
| ||
Lucira Health builds disposable, smartphone-connected diagnostic hardware for infectious disease testing. Its kits turn a consumer smartphone into a portable, real-time analyzer capable of processing multiple biomarkers from bodily fluid samples at the point of care. The product replaces lab-based infectious disease testing with a low-cost, field-deployable alternative accessible outside clinical settings. | Healthcare | 43 |
| ||
Lully builds clinically proven sleep devices for children. Its first product, the Sleep Guardian, sits under a child's mattress and delivers precisely timed vibrations to prevent night terror episodes, replacing the cycle of lost sleep and parental intervention those episodes cause. Lully's broader roadmap targets unmet children's sleep problems through the same combination of sleep science and consumer product design. | Healthcare | 5 |
| ||
Lumi supplies packaging and shipping materials to online brands, ranging from small e-commerce shops to large retailers fulfilling millions of orders. It handles the sourcing and procurement work that brands would otherwise manage across multiple vendors. The customer gets a single source for custom packaging rather than coordinating separate supplier relationships. | B2B | 67 |
| ||
Magic provides dedicated human virtual assistants to busy professionals and businesses, handling tasks across sales, marketing, bookkeeping, customer support, admin, and more. It replaces the need to hire multiple specialized staff by giving clients a single trained assistant who covers a broad range of recurring work. | B2B | 350 |
| ||
Makrwatch connects direct-to-consumer brands with independent YouTube creators to run sponsored content campaigns, giving brands a customer acquisition channel outside Google and Facebook. On the creator side, Makrwatch acts as a representative agency, sourcing brand deals, negotiating contracts, and managing all logistics from briefs to invoicing. The platform replaces the manual, fragmented work of brands sourcing influencers one by one and creators chasing sponsorship opportunities on their own. | B2B | 19 |
| ||
Mashgin builds AI-powered self-checkout kiosks that use computer vision to identify items without barcodes or scanning. Retailers in convenience stores, stadiums, university dining halls, hospitals, and similar high-traffic venues use the hardware to let customers place items, pay, and leave in seconds. The product replaces traditional cashier-operated lanes and barcode scanners, cutting checkout time and reducing queue length. | B2B | 75 |
| ||
Meadow builds point-of-sale, eCommerce, and compliance software for legal cannabis dispensaries. It gives retailers a single platform to manage in-store, online, delivery, and pick-up sales alongside inventory, menus, loyalty, and state regulatory reporting. The product replaces a patchwork of separate retail, compliance, and delivery tools that dispensary operators would otherwise stitch together manually. | B2B | 14 |
| ||
Mezmo builds an observability platform that ingests, processes, and routes log and telemetry data for enterprise engineering, security, and compliance teams. Its newest product, AURA, is an open-source SRE agent that runs inside a customer's own environment, giving site reliability engineers governed, context-aware workflows for root-cause investigation and incident response. The platform replaces manual log management, fragmented data silos, and hand-built glue code between observability tools. | B2B | 172 |
| ||
Mobydish runs a managed catering service for corporate clients, handling everything from online ordering to driver dispatch, delivery, and on-site setup. Companies use it to feed groups of 10 to 1,000 people for meals across the workday, replacing the internal coordination typically required to source restaurants, arrange logistics, and staff an event. Mobydish owns its own technology stack for ordering, order management, and driver dispatch, and employs a trained driver fleet that handles last-minute and recurring orders. | B2B | 10 |
| ||
Moltin provides API-first e-commerce infrastructure for retailers and developers building custom shopping experiences. Its APIs, developer toolkits, and cloud infrastructure replace monolithic commerce platforms, letting teams embed buying functionality into any channel, device, or app. The work it displaces is the heavy lifting of building and maintaining commerce backends from scratch. | B2B | 32 |
| ||
Nextop builds a mobile CDN that sits between iOS and Android apps and their backends. It provides a client-side networking library, a proxy network running a custom protocol, and connection monitoring tools. Mobile developers use it to cut delivery times, improve throughput, and reduce data and battery consumption, replacing ad-hoc network tuning and generic HTTP stacks. | B2B | 2 |
| ||
NexTravel builds a corporate travel and spend management platform for companies that need to book, track, and control business travel costs. It gives employees a single place to book flights, rail, hotels, and rental cars while giving finance and travel managers visibility into spending and policy compliance. The platform replaces fragmented booking processes and manual expense workflows that companies otherwise handle across disconnected tools. | B2B | 17 |
| ||
NimbleRx builds prescription management and on-demand delivery software for independent pharmacies and their patients. Pharmacies use it to digitize ordering, streamline operations, and market to patients, replacing manual workflows and fragmented point-of-care tools. Patients get a single app to manage prescriptions and schedule delivery or pickup. | Healthcare | 130 |
| ||
Nomiku builds connected sous vide immersion circulators for home cooks, replacing the professional kitchen equipment that previously made the technique inaccessible outside restaurants. The device pairs with a meal delivery program, Nomiku Sous Chef, that ships pre-portioned ingredients ready to cook sous vide, removing the preparation work that kept the method out of everyday kitchens. | Consumer | 11 |
| ||
Notable Labs tests live tumor cells from relapsed and refractory blood cancer patients against combinations of FDA-approved drugs to identify which regimens kill cancer cells while sparing healthy ones. The platform runs in a highly automated lab built on custom software, replacing the trial-and-error guesswork clinicians face when standard treatments have failed. By focusing on drug combinations rather than single agents, Notable Labs targets the resistance and relapse that single-drug approaches leave unsolved. | Healthcare | 40 |
| ||
Numerion Labs builds an AI platform for small-molecule drug discovery, targeting immune and inflammatory diseases. Its machine learning system searches chemical space to identify novel drug-like compounds, replacing the experimental trial-and-error that traditional medicinal and computational chemistry rely on. The platform combines structural biology, computational chemistry, and deep learning to generate and advance internal drug programs. | Healthcare | 67 |
| ||
Omniref builds a community-maintained reference layer on top of source code, letting developers find and leave questions, comments, links, and documentation directly tied to the libraries and packages they use. It replaces the scattered, context-free experience of hunting through separate docs sites, Stack Overflow threads, and README files to understand unfamiliar code. The site shut down in January 2017. | B2B | 2 |
| ||
Open Listings built a homebuying platform that guided buyers through the entire purchase process in a single app. By handling search, offers, and closing in one place, it cut out much of the traditional buyer's agent workflow. Buyers kept a portion of the agent commission as savings rather than paying it out in full. | Real Estate and Construction | 48 |
| ||
Outbound builds a multi-channel messaging automation platform for mobile and web products. It lets non-technical marketers and product managers trigger emails, push notifications, SMS, and voice messages based on what users do inside an app, replacing hand-coded notification logic and one-size-fits-all broadcast campaigns. Built-in testing tools let teams measure which messages drive the actions they want. | B2B | 2 |
| ||
Pachyderm builds a data pipeline platform for data engineering and machine learning teams. It handles versioning, lineage tracking, and orchestration across the full data workflow: ingestion, cleaning, transformation, and modeling. It replaces brittle, ad-hoc scripts with a reproducible, production-grade system. | B2B | 60 |
| ||
Pakible lets brands design, price, and order custom product packaging through a self-serve web interface backed by automated operations and vetted manufacturers. It serves companies of all sizes, from startups to established consumer brands, replacing the slow, opaque process of working through packaging brokers or negotiating directly with factories. The result is faster turnaround and lower costs than either traditional channel. | B2B | 3 |
| ||
Paperspace builds a cloud GPU platform for developers and teams training, fine-tuning, and deploying AI and machine learning models. Its Gradient product covers the full ML workflow, from notebooks and training runs to production deployments, replacing the need to provision and manage on-premises or bare-metal GPU infrastructure. Paperspace also offers cloud-hosted virtual desktops for individuals and enterprises. It is now part of DigitalOcean. | B2B | 50 |
| ||
Pigeonly builds a communication platform for families and friends of incarcerated people, replacing the fragmented, high-cost process of staying in touch with inmates across federal, state, and county facilities. Its proprietary inmate search tool, Haystac, indexes millions of records in real time to locate inmates across more than 4,000 facilities. From a single interface, users can send photos, letters, postcards, greeting cards, and articles, and make phone calls at a sharply reduced cost compared to traditional prison telecom providers. | Consumer | 40 |
| ||
Platzi builds an online technology school for Spanish-speaking professionals, teaching courses in programming, design, and marketing. Courses are led by industry practitioners and include real-time student collaboration, replacing fragmented self-study and traditional classroom training. The platform targets lifelong learners seeking to advance technical and creative careers. | Education | 300 |
| ||
Pomello builds culture analytics software for companies hiring at scale. It maps culture at the team level and scores candidates against those profiles, replacing manual, intuition-based fit assessments. The underlying methodology draws on organizational behavior research and plugs into existing recruiting workflows. | B2B | 8 |
| ||
Popular Pays builds software that connects brands with content creators and influencers to produce and manage marketing campaigns. Brands use a dashboard to communicate directly with creators, coordinate multi-platform campaigns, and track performance, replacing ad-hoc outreach and manual campaign management. The product serves marketing teams that need a structured workflow for sourcing, briefing, and collaborating with creators at scale. | B2B | 37 |
| ||
Pretty Instant built a managed marketplace connecting brands and non-profits with vetted freelance photographers and videographers across the U.S. The platform handled end-to-end production: staffing, logistics, editing, and delivery for events, portraits, real estate, product, and food shoots. It replaced the fragmented work of sourcing, vetting, and coordinating independent photographers that marketing and events teams had previously managed themselves. | Consumer | 3 |
| ||
Priime builds photo editing tools for photographers who want professional results without the noise of consumer filter apps. The suite, available on iPhone, iPad, and Mac, replaces generic filters with hand-crafted styles created by working photographers, and adds automatic style suggestions based on subject matter, color palette, and exposure. The work it replaces is the manual, trial-and-error process of sorting through hundreds of filters to find a look that suits a specific shot. | Consumer | 3 |
| ||
Quantierra sources and analyzes real estate investment opportunities for developers and institutional buyers. It uses proprietary data and algorithms to evaluate what can be built on a given property, project the asset's value, and estimate sale probability, replacing the manual legwork of deal sourcing and feasibility analysis. Quantierra earns a cut of each transaction it helps close. | Real Estate and Construction | 5 | Not listed | ||
Qventus builds an AI platform that automates hospital operations for health systems across the United States. It targets surgical services, inpatient capacity, perioperative coordination, and pharmacy, replacing manual workflows that clinical and administrative staff otherwise handle by hand. The platform combines machine learning and behavioral science to surface and execute the right operational actions in real time, reducing the burden on hospital teams managing patient flow and care coordination. | Healthcare | 230 |
| ||
Rare Door builds an e-commerce platform that connects shoppers with products available at nearby brick-and-mortar stores. Retailers use it to surface their in-store inventory to local buyers online, replacing the manual work of driving foot traffic through traditional channels. The product targets independent and local retailers who lack a direct way to reach nearby shoppers digitally. | Consumer | 2 |
| ||
Raven Tech builds a next-generation operating system for mobile, combining artificial intelligence and big data to replace the conventional interaction model found in iOS and Android. The product targets B2B customers seeking smarter, AI-driven platform infrastructure. | B2B | 11 |
| ||
Razorpay builds payment and banking infrastructure for Indian businesses, covering online payment acceptance, payouts, payroll, and banking accounts in a single platform. It serves startups, SMEs, and large enterprises, replacing fragmented bank integrations, manual payout workflows, and offline-only point-of-sale setups. Its omnichannel stack spans UPI, cards, recurring billing, international payments, POS hardware, and multi-network tokenization. | Fintech | 2700 |
| ||
ReadMe builds a full documentation platform for companies that ship APIs, replacing hand-rolled doc sites and static reference pages with interactive developer hubs. Engineering and developer-relations teams use it to publish API references, guides, changelogs, and tutorials in one place, keeping content in sync with their codebase via GitHub and GitLab integrations. Built-in AI tooling, an MCP server, and an API linter handle writing, review, and style enforcement. | B2B | 52 |
| ||
Remix builds transit planning and scheduling software for city governments, transit authorities, school districts, and other public agencies. Planners use it to redesign routes, manage day-to-day service, optimize driver and vehicle scheduling, and design street infrastructure, replacing manual processes and disconnected tools. The platform covers the full planning cycle, from network redesign to on-demand service design to block and runcut generation. | Government | 65 |
| ||
Replika builds an AI companion app for consumers who want a persistent, emotionally aware conversational partner. The AI retains personal details, relationships, habits, and ongoing concerns across conversations, standing in for the journaling, self-reflection, or social processing a person might otherwise do alone or with a therapist or close friend. It targets everyday users dealing with loneliness or seeking a low-stakes space to talk through their lives. | Consumer | 28 |
| ||
ReSchedule Med builds scheduling software for hospital residency programs and graduate medical education administrators. It handles the full workflow of creating, managing, and adjusting resident schedules, replacing the manual coordination that makes rescheduling one of the heaviest operational burdens in teaching hospitals. | Healthcare | Not listed |
| ||
Rescue Forensics builds digital forensics software for law enforcement agencies investigating human trafficking. Its platform, Rescue Ops, continuously archives large volumes of commercial sex advertisements from classified ad websites, giving investigators a structured, searchable record of data that would otherwise have to be gathered and preserved by hand. The product turns raw online ad activity into actionable intelligence for anti-trafficking cases. | Government | Not listed |
| ||
Resolve builds a BIM collaboration platform for construction teams, giving field crews, owners, and operations staff direct access to 3D building models via VR headsets, iPad, and web browser. It targets data centers, biopharma facilities, and other complex builds where coordination between designers, contractors, and the teams who will operate the finished building is error-prone and slow. Resolve replaces screen-sharing sessions and 2D floorplan reviews, letting operations and maintenance teams walk through full-scale models before construction is complete to catch issues while changes are still cheap. | Real Estate and Construction | 10 |
| ||
Sails Co. builds and maintains the Sails open-source Node.js web framework and its related projects, including Waterline and Skipper, created by the framework's original authors. Alongside the open-source tools, the company runs a full-service web and mobile studio that designs and builds scalable applications for startup and enterprise clients. It replaces the need to hire separate strategy, design, and engineering teams by handling the full stack in-house. | B2B | 4 |
| ||
Seed builds a mobile-first banking service for small businesses, replacing traditional branch-based banking with digital tools for opening accounts, managing day-to-day finances, and accessing customer support. The product targets small business owners who need straightforward banking without the friction of incumbent banks. | Fintech | 11 |
| ||
Shasqi develops cancer therapeutics using its CAPAC platform, which applies click chemistry to activate treatment directly at the tumor site. A click chemistry reagent is localized in the tumor; when a systemically infused prodrug reaches it, the two react and release an active therapy at the target. This confines the therapeutic effect to the tumor while holding systemic exposure below toxic levels, replacing the blunt-force toxicity of conventional chemotherapy. | Healthcare | 28 |
| ||
Shift Labs builds affordable medical devices for patients receiving care outside the hospital. Its flagship product, DripAssist, is the first FDA-cleared infusion rate monitor for gravity IV infusions, used by home infusion providers to track fluid delivery remotely and accurately. It replaces expensive, unreliable infusion pumps and the manual oversight those pumps require. | Healthcare | 6 |
| ||
Shift Messenger builds a real-time messaging platform for retail and restaurant employees. It gives hourly workers and their managers a dedicated communication channel for day-to-day coordination, replacing ad-hoc texts, phone calls, and paper-based scheduling conversations. The product targets reduced employee turnover and lighter administrative load for store and floor managers. | B2B | 2 |
| ||
SigOpt builds an optimization platform that tunes research and machine learning pipelines by running an ensemble of optimization algorithms against any existing workflow. Data scientists and researchers in insurance, credit card, algorithmic trading, and consumer packaged goods use it to replace manual hyperparameter search and experiment management. A self-hosted server option and a lightweight in-memory module let teams run SigOpt entirely within their own infrastructure. | B2B | 23 |
| ||
SIRUM connects surplus medicine, from nursing homes, pharmacies, manufacturers, and individuals, to safety-net clinics and community partners serving patients who cannot afford their prescriptions. Its technology platform matches donated, unexpired drugs to the organizations that need them, replacing a process where billions of dollars of usable medicine is destroyed each year. SIRUM also advises county governments and drug donor groups on building compliant redistribution programs. | Unspecified | 15 |
| ||
Smarking builds enterprise software for parking asset owners and operators, replacing manual reporting and gut-feel pricing with a centralized analytics platform and an automatic dynamic pricing engine. It ingests data across parking locations, surfaces occupancy and revenue metrics in real time, and adjusts prices to lift online sales. Cities, property owners, and parking operators use it to manage inventory and make data-driven decisions across their portfolios. | B2B | 17 |
| ||
Smyte protects marketplaces and social networks from spam, scams, harassment, and payment fraud. It automatically classifies event data from websites and mobile apps to identify and block bad actors at scale, replacing manual review and patchwork rule systems that platforms otherwise build in-house. | B2B | 11 |
| ||
SparkGift lets individuals give fractional shares of individual stocks and index funds as gifts, requiring no existing brokerage account from the recipient. It targets everyday gift-givers who want to send a financial asset instead of a retail gift card, handling custody, regulatory compliance, and small-dollar transactions down to $20. The product was later acquired by Stockpile. | Fintech | 2 |
| ||
Spire Health builds remote patient monitoring hardware and software for chronic lung disease, sold to pulmonology practices across the United States. Its core technology is continuous respiratory sensing, delivered through wearable sensors that stream data to clinicians. The product replaces periodic in-office assessments with ongoing, between-visit visibility into patient respiratory status. | Healthcare | 52 |
| ||
Spoil builds a food product scanner that tells consumers what is actually inside packaged goods. Users scan a barcode or search a product name and receive a scored breakdown across nutrition, additives, and processing level, with each additive weighted by how much of it can legally be present, not just whether it appears on the label. The tool replaces manual label reading and opaque third-party ratings with a transparent, open-source scoring method users can audit and reconfigure. | Consumer | 2 |
| ||
Standard Cyborg builds cloud and edge tools for computer vision, targeting both developers and non-developers who need to create, deploy, and iterate on perception applications. The platform lowers the barrier to CV development by replacing custom infrastructure work with ready-made tooling. The product has since been retired and open-sourced on GitHub. | Healthcare | 9 |
| ||
Tab builds a social commerce platform for travel, connecting tourists with recommendations from friends, creators, and local experts so they can discover and book hotels and experiences directly with independent tourism businesses. It replaces generic listing sites and third-party booking platforms, letting travelers pay businesses directly across more than 100 currencies while cutting out intermediary fees. | Consumer | 9 |
| ||
Tara AI builds an engineering efficiency platform for engineering leaders, using fine-tuned LLMs trained on source control and project data. It surfaces unified metrics across cycle times, delivery velocity, benchmarks, and investment allocation, replacing manual data gathering and ad hoc reporting. The product gives engineering teams a continuous, structured view of where time is spent and where delivery slows down. | B2B | 13 |
| ||
TeamNote builds a private mobile communications and productivity platform for enterprise workforces, including deskless, remote, and contractor employees. Its suite covers messaging, helpdesk, workflow, and room reservation, replacing fragmented consumer apps and manual coordination tools. The platform now extends into on-premises AI agents, letting corporations run generative intelligence analysis on internal data without sending it to external servers. | B2B | 11 |
| ||
Tech in Asia covers technology news, trends, startups, and established companies across the Asian tech ecosystem for an English-speaking global audience. It serves founders, operators, and investors who need to track the region's fast-moving markets. The publication replaces scattered, fragmented sources by consolidating Asian tech coverage in one outlet. | Consumer | 70 |
| ||
Tempo builds an AI-powered home gym system for strength training, using computer vision to track movement, guide form, and adapt workout plans in real time. It targets individual consumers who want personalized coaching at home, replacing both in-person personal trainers and generic fitness apps. Color-coded smart weights, 3D body composition scans, and virtual personal training sessions are the core of the experience. | Healthcare | 158 |
| ||
The Human Utility runs a nonprofit platform that connects low-income families facing water shutoffs with donors who pay their utility bills directly to the utility company. A bill is split across multiple donors, expanding the pool of contributors much like a loan syndicate. Beyond bill relief, the platform uses utility data to design interventions that address the root causes of unaffordability, with the goal of preventing disconnections before they occur. | Unspecified | 2 |
| ||
ThinAir builds a cloud-based data security platform for enterprise teams. It gives both administrators and employees direct control over sensitive data without disrupting day-to-day workflows. The product replaces security tools that typically require IT to act as a gatekeeper, locking out or slowing down the people who actually use the data. | B2B | 11 |
| ||
Transcriptic operates a robotic cloud laboratory platform for life science researchers, letting pharmaceutical and biotech scientists design, run, and analyze experiments remotely through a web interface. Its Common Lab Environment integrates instruments, lab processes, and IoT devices into a single software layer. The platform replaces manual bench work, giving researchers reproducible, on-demand access to fully automated experimentation without being physically present in a lab. | Healthcare | 13 |
| ||
Underground Cellar sells wine online by replacing traditional discounts with randomized bottle upgrades, turning each purchase into a chance to receive a higher-value wine than the one ordered. Buyers get better value without eroding brand perception, and producers move inventory without publicly discounting their labels. The model serves both retail wine consumers and wine brands competing in the U.S. consumer wine market. | Consumer | 26 |
| ||
Valor Water Analytics builds a SaaS analytics platform for water utilities, turning raw operational and meter data into actionable insights. Utilities use it to detect inefficiencies, track water loss, and make decisions that previously required manual data wrangling or outside consultants. The platform replaces spreadsheet-heavy analysis and fragmented reporting workflows that slow utility operations teams down. | Industrials | 2 |
| ||
Vanhawks builds the Valour, a carbon fibre commuter bicycle with embedded GPS, blind-spot sensors, and turn-by-turn handlebar navigation. It targets urban cyclists who navigate traffic daily, replacing paper routes and after-market accessories with a single integrated system. A companion app logs ride history and recommends the fastest or most efficient routes based on collected riding data. | Consumer | 11 |
| ||
Vest builds structured investment products that package derivatives strategies into defined outcome profiles, giving retail and institutional investors access to tools previously reserved for large institutions. Its Target Outcome Investments set a specific return target, a bounded risk level, and a fixed time horizon, then deliver them as ETFs, mutual funds, UITs, CITs, and managed accounts. The firm replaces bespoke institutional derivatives desks by industrializing that engineering into standardized, scalable products. | Fintech | 50 |
| ||
VetPronto sends licensed veterinarians directly to pet owners' homes or workplaces for medical care, eliminating the clinic visit. The service targets urban pet owners across several major U.S. cities. It replaces the traditional in-office appointment with a tech-coordinated house call that includes digital medical records, client messaging, and pharmacy fulfillment. | Healthcare | 51 |
| ||
WayUp connects employers with college students and recent graduates looking for internships and full-time jobs. Employers post roles and source candidates through the platform, replacing traditional on-campus recruiting and generalist job boards. Students upload a resume to get a matched profile and browse open roles from companies actively hiring early-career talent. | Consumer | 50 |
| ||
Wink Health runs a digital sleep clinic that takes sleep apnea patients from initial screening through diagnosis and treatment without a single in-person visit. A smartphone app records breathing sounds during sleep to flag apnea risk, a telehealth layer connects patients with physicians, and prescribed treatments ship directly to their homes. The company targets the large population of adults who have sleep apnea but have never been diagnosed or treated, replacing the traditional in-clinic sleep study and referral chain. | Healthcare | 2 |
| ||
WorkLife builds a web app that helps teams run more productive meetings. It guides users through creating agendas before meetings, staying on track during them, and following up on action items afterward, replacing the ad hoc habits that leave most meeting time unproductive. | B2B | 2 |
| ||
X-Zell develops a rare cell detection platform that isolates and visualizes abnormal cells, such as Circulating Endothelial Cells, from blood samples. The platform covers every step from blood processing to cell analysis and reporting using patented, proprietary technology. It targets clinical and research applications including early cancer detection, companion diagnostics, medication management, and relapse monitoring, replacing less sensitive or more invasive diagnostic approaches. | Healthcare | 19 |
| ||
YesGraph builds a referral intelligence API that tells each user of an app exactly which contacts to invite, using machine learning and social graph analysis. It targets mobile and web product teams who want to grow through word-of-mouth without hand-coding invite ranking logic. The product replaces manual, unsorted contact lists with ranked invite recommendations tuned to maximize referral conversions. | B2B | 2 |
| ||
Yhat builds an end-to-end platform for managing the data science lifecycle, serving enterprise teams that need to develop, deploy, and maintain machine learning models in production. It replaces the fragmented, manual work of stitching together disparate tools across model building, versioning, and deployment. Yhat was acquired by Alteryx (NYSE: AYX). | B2B | 17 |
| ||
Zeitview builds AI-powered inspection and asset intelligence software for energy and critical infrastructure operators. Certified pilots collect aerial and ground-level data using drones, fixed-wing aircraft, and robotic crawlers across solar, wind, utility, oil and gas, and property assets, then machine learning models and human analysts convert that data into severity-ranked findings tied to exact locations. The platform replaces manual crew inspections and unstructured image review with continuous, portfolio-wide monitoring that feeds directly into customers' GIS, EAM, and ERP systems. | Industrials | 200 |
| ||
Zenflow builds an implantable device for men with benign prostatic hyperplasia, a condition that causes urinary obstruction and affects tens of millions of men. The Zenflow Spring is a small implant placed by a urologist in an office procedure that mechanically opens the blocked urethra, delivering lasting symptom relief. It replaces the two standard options: long-term medication, which carries systemic side effects and limited efficacy, and invasive surgery, which risks sexual dysfunction. | Healthcare | 18 |
|
About this data
Company facts and descriptions come from Y Combinator's public directory. Each company page links to its original listing.
While a batch is still filling, we check its roster every day, and each page shows the date of the last check. Companies that drop off the directory drop off the roster here too.
Profiles marked as GPAgent's are our own fund-neutral summaries, written from public information. No fund's scores, notes, or pipeline go into them.
Source: ycombinator.com (opens in a new tab) GPAgent is not affiliated with Y Combinator.
Score this batch against your own thesis
GPAgent's sourcing agent reads every company in a batch, scores each one against your fund's thesis in a private workspace, and lines up the founders worth meeting before Demo Day. You decide who to contact. Your scores, notes, and pipeline never appear on these pages.
How Accelerator intelligence works