YC Winter 2010 (W10) companies

500Friends builds loyalty marketing software and services for CMOs at mid-size and enterprise brands. Its SaaS platform, LoyaltyPlus, handles program design, customer segmentation, and rewards mechanics, while an in-house team covers strategy, integration, analytics, and ongoing program management. The product replaces fragmented point solutions and agency relationships that brands previously stitched together to run retention programs.

All Screen operates an online video ad network that connects brands and agencies with video content audiences across the web. It provides engagement and data tools that help media buyers plan and run video ad campaigns more effectively, replacing manual, lower-signal approaches to video media buying.

Answerly builds a tool that helps businesses find and respond to questions people are asking publicly about their products or industry. It surfaces relevant incoming questions so companies can engage directly with prospective customers at the moment of intent, replacing manual searches and missed opportunities to connect with buyers mid-consideration.

Bitplay built a browser-based video meeting tool that let anyone join a shared room by clicking a link, with no sign-up or software installation required. It served individuals and teams who needed face-to-face remote meetings, replacing scheduled conferencing software and its registration friction. The product was acquired by Jive Software in 2013.

Cardpool runs a gift card exchange marketplace where consumers buy discounted gift cards, sell unwanted ones for cash, swap them for Amazon gift cards, or donate them to charity. The platform replaces the dead-end of holding a gift card from a store a customer never uses. Cardpool handles shipping for both sides of each transaction and backs purchases with a 100-day return policy.

Creative Market runs a marketplace where independent designers sell ready-to-use digital assets, including fonts, graphics, templates, photos, add-ons, and themes. Buyers, typically designers and creative professionals, get immediate access to finished assets rather than commissioning custom work or building from scratch.

Crocodoc builds an embeddable document viewing and collaboration engine that lets web and mobile apps render PDFs, Word files, and PowerPoint presentations natively in the browser. Developers integrate it so their users can view, annotate, highlight, and fill out documents without leaving the host product. It replaces the need to build or maintain custom document rendering infrastructure.

Cue aggregates a user's email, contacts, and calendar into a single unified view, surfacing relevant information at the right moment throughout the day. It replaces the manual work of switching between accounts and piecing together context before meetings, tasks, and conversations. Consumers get an at-a-glance daily digest and a single search across all connected accounts.

Data Marketplace connects buyers and sellers of data through an online exchange. Buyers post a request describing their data need, an optional deadline, and a budget, and data aggregators respond with matching datasets available for immediate purchase and download. The platform replaces direct vendor hunting and custom data procurement negotiations by centralizing discovery and transactions in one place.

Embedly builds an API platform that converts links from thousands of media sources into rich embedded content, automatically. Publishers and developers use it to render videos, images, polls, and other media without writing custom integration code for each provider. It replaces the manual work of managing individual embed codes and content extraction across sites like YouTube, Flickr, and Hulu.

Etacts builds a relationship management tool for professionals and individuals who struggle to stay in touch with a growing network of contacts. It surfaces contacts who have gone quiet, lets users schedule follow-up reminders, and pulls in past email exchanges and social updates to give context before reaching out. The product replaces the mental overhead of manually tracking who needs attention and when.

Fabricly built an online marketplace connecting apparel brands, independent designers, and retailers with manufacturers and materials suppliers. Buyers used the platform to research manufacturers and send sourcing jobs out to bid across a broad supplier network, replacing the manual, relationship-dependent process of finding and vetting production partners.

Fithub builds a B2B platform in the fitness industry. No further details about its product, customers, or the work it replaces are available from the sources provided.

Gamador builds social games, releasing titles at a pace of roughly one per week rather than following the industry's longer development cycles. The company targets the social gaming market and has shipped three games. Alongside its games, Gamador developed Rankador, an analytics platform that ranks social games by engagement, replacing ad-hoc or manual methods of measuring game performance.

Infoharmoni builds Atlas, a public directory and ledger of the x402 agent-commerce market. It tracks every service that sells to AI agents over the x402 protocol, pulling payment data from the Base blockchain and registry each morning. Builders use it to evaluate what their agents pay for; sellers use it to monitor competitors and buyers in their market.

LaunchHear connects bloggers with companies launching new products, giving bloggers early review copies and giving companies a scalable channel for earned media coverage. It replaces the manual, one-by-one outreach that characterizes traditional PR pitching.

Mertado builds a social shopping platform that lets consumers discover and purchase products through the online communities they already belong to. It replaces passive browsing on generic retail sites with contextual product discovery driven by community activity and shared interests.

Mixed Media Labs builds consumer products. No further details about its specific product, target customer, or the work it replaces are publicly available from the program description or website.

Movity built a location-based data platform for home buyers, surfacing neighborhood-level information, crime rates, noise levels, and pricing trends on a map. It replaced the manual work of researching and cross-referencing geodata from multiple sources during a home search. Trulia acquired the company.

Newcope builds a commerce platform for virtual goods, enabling consumers to buy and sell digital items within online environments. The platform replaces informal or fragmented peer-to-peer trading by providing a structured marketplace for virtual goods transactions.

Newslabs builds a platform for traditional journalists moving their work online. It handles the web-native tasks, such as advertising and SEO, that print-trained journalists have not previously managed themselves, replacing the need to hire or consult specialists for each of those functions.

Notifo builds a platform that lets websites and web services push real-time notifications to mobile devices, starting with iPhone. It replaces custom in-house notification infrastructure that developers would otherwise have to build and maintain themselves.

Nowmov builds a continuous, personalized video feed for consumers, surfacing clips based on individual interests, social connections, and global trends. It replaces the work of manually hunting for videos across platforms by delivering a hands-free, curated stream that updates automatically.

Optimizely builds a combined content management, experimentation, and personalization platform for marketing and product teams. It covers the full content lifecycle: creating digital experiences, running A/B and multivariate tests across customer touchpoints, and personalizing at scale, replacing the patchwork of separate CMS, testing, and analytics tools those teams would otherwise stitch together. AI agents handle workflow automation throughout, letting teams publish, test, and optimize without proportional headcount growth.

OwnLocal builds automated digital marketing software for small and medium-sized businesses, distributed through local media companies such as newspapers, radio stations, and broadcast television outlets. It converts the existing print and broadcast advertiser relationships those media companies hold into active digital advertising accounts. The product sits between legacy local media sales teams and their SMB clients, replacing manual campaign setup and management work.

Zencoder builds a cloud API for video and audio encoding, serving media and software teams that need to transcode live and on-demand video at scale. It also maintains Video.js, a widely used open-source web video player. The product replaces the work of buying, managing, and scaling on-premise encoding hardware and software.

Zenedy aggregates web content on obscure topics, surfacing information that is otherwise scattered or hard to find for curious consumers.