YC Companies/Winter 2011

YC Winter 2011 Data Room

44 companies·Last synced Apr 5, 2026
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44 of 44 companies
MarketPublic ProfileFoundersLinks
B2B
B2B -> Productivity
San Francisco, CA, USA
Public profile enrichment pending.
Gleb Arshinov

.NET Cloud Platform as a Service

B2B
B2B -> Infrastructure
San Francisco, CA, USA
Cloud Computing

AppHarbor is a .NET Platform-as-a-Service. Developers push code to AppHarbor using either Git or Mercurial. AppHarbor then builds the code and runs any unit tests. If everything checks out, the code is deployed to AppHar…

1
Michael Friis
Rune Soerensen
Troels Thomsen

iOS porting

B2B
B2B -> Infrastructure
San Francisco, CA, USA

Apportable allows developers to cross-compile Objective-C apps to Android, without maintaining a separate code base in Java. It is used by many top-rated iOS games like Kingdom Rush and Osmos to deploy to Android stores …

51
Ian Fischer

Pivoted to TenXList, a professional network of top college engineers.

Consumer
Consumer -> Social
Palo Alto, CA, USA
Education
Recruiting
Public profile enrichment pending.2
Evan Reas
Shubham Mittal

Payments for Marketplaces

Fintech
Fintech -> Consumer Finance
San Francisco, CA, USA
Marketplace
Payments

Payments for Marketplaces. We're obsessed with all forms of infrastructure, including communications, transportation, energy, waste management, and payments. Robust infrastructure creates a happier, more productive, and…

11

Facebook stores.

B2B
B2B -> Retail
Mountain View, CA, USA
E-Commerce
Retail

Beetailer. Your online store in Facebook Bring your store to Facebook and grow your business Our software helps you import your existing web store onto FB. We give you tools for promoting it and detailed analytics abou…

2
Juan Gallego
Laura Valverde
Miguel Martinez Trivino

CRM and sales automation tools for startups and SMBs

B2B
B2B -> Sales
Remote
SaaS
B2B

Close is a modern CRM with built-in sales communication tools for startups and SMBs.

120
Anthony Nemitz
Steli Efti
Thomas Steinacher

SaaS to increase speed and quality of clinical trials.

Healthcare
Healthcare -> Healthcare IT
Redwood City, CA, USA
SaaS

Comprehend, the leader in Clinical Intelligence solutions, is focused on accelerating treatments to patients. Our suite of software applications provide clinical operations, data management and medical review teams with …

51
Rick Morrison

Hosted IRC and so much more.

Consumer
Consumer -> Social
San Francisco, CA, USA
Community
Messaging

Convore is an online platform that enables its users to communicate with groups in real time. Its users have the ability to join an existing group or create groups of their own. Convore allows its users to post topics a…

2
Eric Florenzano
Eric Maguire
Leah Culver

Custora is a predictive analytics platform for e-commerce marketing…

B2B
B2B -> Analytics
New York, NY, USA
E-Commerce
Analytics
Retail Tech

Custora is an advanced segmentation platform designed to help online retailers better understand and market to their customers. We’re on a mission to remove the “mass” from marketing with software tools that focus on cus…

11
Corey Pierson
Jon Pospischil

The essential platform for modern medical practices and patients.

Top Company
Healthcare
Healthcare -> Healthcare IT
CA, USA; Remote
Healthcare
Telemedicine
API

DrChrono develops the essential platform and services for modern medical practices to make care more informed, more interactive, and more personalized. The open platform powers telehealth, electronic health record (EHR),…

150
Daniel Kivatinos
Michael Nusimow

Google AdWords for music. Allowing bands and labels to bid for…

B2B
B2B -> Marketing
Los Angeles, CA, USA
Advertising
Music

Google AdWords for music. Allowing bands and labels to bid for airtime and have their music streamed to qualified audience.

15
Benjamin Bryant
Joey Flores
Yotam Rosenbaum

New projects

Consumer
Consumer -> Home and Personal
Ringwood, NJ, USA
Health Tech
Fitness

[FitFu is now closed. Here's the original description. It was one of the first gamified fitness apps] * Track your motion Using the accelerometer on your iPhone or iPod Touch, FitFu gives you feedback to help you k…

2
Benjie Gillam
Jof Arnold

Customer loyalty and payments platform for small businesses.

Top Company
B2B
B2B -> Retail
San Francisco, CA, USA
Fintech
Marketplace

Fivestars is a leading payment and customer loyalty platform for small local businesses. Our mission is to help businesses and communities thrive by turning every transaction into a relationship. Since launching in 2…

201
Matt Doka
Victor Ho

Third generation of web apps.

B2B
B2B -> Retail
San Jose, CA, USA
SaaS
API

Flotype Inc. is a venture-backed company building a suite of enterprise technology for real-time messaging. Flotype takes a unique approach by building developer-friendly technologies focused on ease-of-use and simplicit…

2
Darshan Shankar
Eric Zhang
Sridatta Thatipamala

Platform for the greatest products from the past, present and future.

Top Company
Consumer
Consumer -> Apparel and Cosmetics
Los Angeles, CA, USA
Marketplace

GOAT Group represents the leading platforms for authentic sneakers, apparel and accessories. Operating four distinct brands–GOAT, Flight Club, Grailed and alias–GOAT Group has a global community of over 50M members acros…

1600
Daishin Sugano
Eddy Lu

eSignature software for small and mid-market businesses.

Top Company
B2B
B2B -> Productivity
San Francisco, CA, USA
SaaS
Enterprise Software

We believe that the way business gets done today is broken. That’s why we’re dedicated to simplifying work for everyone - from small startups to large enterprise companies. Millions of individuals and over 65,000 compani…

100
Neal O'Mara

Real-time analytics (acq by TWTR, 2012)

B2B
B2B -> Marketing
San Francisco, CA, USA
Analytics

Moki.TV is a directory of all paid and free content included on Amazon's streaming service, Netlfix, Hulu, iTunes, and others.

2
Alexander Spicer
Matt Huang

Pay what you want for awesome games and other content while giving to…

Consumer
Consumer -> Gaming
San Francisco, CA, USA
Entertainment
Gaming

Humble Bundle is a distribution platform selling games, ebooks, software, and other digital content. Since Humble’s founding in 2010, our mission has been to support charity (“Humble”) while providing awesome content to …

100
Jeffrey Rosen
John Graham

Ebook publisher.

Consumer
Consumer -> Content
San Francisco, CA, USA

Hyperink, the San Francisco based self-publishing platform, wants to unlock and sell that untapped information by giving every citizen the ability to publish a book.

11
Kevin Gao
Min Ming Lo

Fashion shopping email list.

Consumer
Consumer -> Apparel and Cosmetics
San Francisco, CA, USA
E-Commerce
Retail
Fashion

Inporia's current product is Kaleidoscope - a inspiration ecommerce app and widget. Kaleidoscope launched on Android in Feburary 2011 and was made available for the iPhone in April 2011. It’s the first in what promises …

11
Max Sky (CEO, Vault12)
Ryan Junee

Turning PhDs & engineers into data scientists & data engineers

Education
Education
Palo Alto, CA, USA
Data Science
Data Engineering

The Insight Data Science Fellows Program is an intensive seven week post-doctoral training fellowship bridging the gap to new careers in Data Science, Data Engineering, Health Data, and AI in Silicon Valley, New York Cit…

11
Jake Klamka

Custom-made artwork from artists e-commerce marketplace.

Consumer
Consumer -> Home and Personal
San Francisco, CA, USA; Remote

Instapainting turns any photo (from your phone, Facebook, Instagram, DSLR, the internet) into a hand-painted oil painting on real canvas, for $45 (for 10"x10"), and delivered in less than two weeks. The company is bac…

2
Chris Chen

IMDB of conferences.

Consumer
Consumer -> Job and Career Services
London, England, United Kingdom

Get more out of conferences with http://lanyrd.com/ - the social conference directory. Find conferences that your Twitter friends are going to, build up a speaker portfolio of talks you have given, and catch up on what h…

2
Simon Willison

Email API service.

B2B
B2B -> Engineering, Product and Design
San Francisco, CA, USA
API
Email

Mailgun is a developer-focused email delivery platform that empowers companies to send, receive, and track transactional and marketing emails through an API. Founded in 2010, Mailgun became a Y-Combinator success stor…

51
Ev Kontsevoy
Taylor Wakefield

Mobile games company

Hiring
Consumer
Consumer -> Gaming
Montreal, QC, Canada
Gaming

Top-25 grossing mobile gaming studio. Backed by Andreessen Horowitz and Y Combinator.

11
Josh Buckley

Order ahead for pickup

Consumer
Consumer -> Food and Beverage
San Francisco, CA, USA
Cashierless Checkout
Marketplace
Payments

OrderAhead is a mobile ordering and payments company that enables millions of users to order pickup from thousands of local merchants.

50
Ruddick Lawrence

Watch that helps you get shit done and limit the mayhem of…

Consumer
Consumer -> Consumer Electronics
Palo Alto, CA, USA
Productivity

Pebble Technology builds smart watches. We're the team behind the Pebble smartwatch from Kickstarter (http://kck.st/HumIV5). Pebble is a customizable watch. Download new watchfaces, watchapps, use sports and fitness app…

51
Eric Migicovsky

High speed peer to peer data transport technology for consumers…

B2B
B2B -> Productivity
San Francisco, CA, USA

Sendoid is an on-demand peer to peer transfer system. It makes transferring any size file between two people as simple as clicking a link!

2
John Egan
Zac Morris

Siasto is a collaboration tool designed for SMBs who use Google Apps,…

B2B
B2B -> Productivity
San Francisco, CA, USA
Productivity
Collaboration
SMB

Siasto is a collaboration and project management tool that integrates into Google Apps, Gmail, Google Drive, GCal, box, and Dropbox. It's used by teams, SMBs, and enterprises to keep all their tasks, events, projects,…

2
Courtland Allen

Sell your stuff.

Consumer
Consumer -> Home and Personal
San Francisco, CA, USA
Marketplace
Computer Vision

SimplyListed makes it really easy for people to sell their stuff. You just take a picture, and they list your item for sale automatically. A prototype of the SimplyListed iPhone app was first released on the iTunes Ap…

2
Jon Grall

The cloud-native, operational database built for speed and scale.

B2B
B2B -> Infrastructure
San Francisco, CA, USA

MemSQL is The No-Limits DatabaseTM, powering modern applications and analytical systems with a cloud-native, massively scalable architecture for maximum ingest and query performance at the highest concurrency. MemSQL env…

150
Eric Frenkiel
Nikita Shamgunov

Record your family stories and print them in beautiful keepsake books.

Consumer
Consumer -> Home and Personal
Kailua, HI, USA; Stockholm, Stockholm County, Sweden; Remote
SaaS
E-commerce

Storyworth is a service that makes it easy for families to record their stories. Each week they email their customers a question about their life, for example "What do you remember of your grandmother?". Their customers …

13
Nick Baum

Online store referrals.

B2B
B2B -> Retail
San Francisco, CA, USA
E-Commerce
Referrals

Talkable (formerly Curebit) helps online stores increase revenue through referrals by turning existing customers into marketers. When customers check out from a Talkable-enabled store, they are presented personalized …

76
Allan Grant

Consumer to business messaging.

B2B
B2B -> Retail
Mountain View, CA, USA
Messaging
Customer Service

Acquired by Google, integrated natively into Google Maps.

Michael Ma
Qasar Younis
Sunny Dhillon

Google Voice for business.

B2B
B2B -> Productivity
San Francisco, CA, USA
Messaging
Enterprise

Fastest, easiest way to setup a phone system for your business. We take something that has traditionally been painful and expensive, and make it available to everyone. The easiest way to set up a phone system for your …

2
Conor Lee
Jason Corwin
Zain Memon

How businesses send money to people at scale. Fast, free, global.

Fintech
Fintech -> Payments
Remote
Fintech
Payments

Tremendous is a payouts platform for businesses to send money and gift cards to anyone, anywhere. Used by 25k+ companies for one-time payments, including research compensation, marketing incentives, and employee recognit…

130
Nicolas Baum

Trust funds.

Fintech
Fintech -> Asset Management
Culver City, CA, USA
Finance
Investing

TrustEgg is the simple, social way to save for a child's future. TrustEgg will dramatically change the US savings rate, one child at a time. TrustEgg enables parents to create a Trust for their child in minutes for fre…

2
Gabe Krambs
Jeffrey Brice

Tumult is building the next generation of apps for web design. Our…

B2B
B2B -> Engineering, Product and Design
San Francisco, CA, USA
Developer Tools
Design Tools

Tumult Inc. makes the next generation of designer tools to produce beautiful web content.

1
Jonathan Deutsch

Online tutoring marketplace.

Education
Education
Chicago, IL, USA
Education
Marketplace

From passing a prereq to landing your dream job, Wyzant connects people who need to know with the experts who can teach them. With more than 80,000 tutors qualified in 300+ subjects, we offer the best way to get the …

51
Aaron Harris
Josh Abrams
Ryan Bednar

The future of hardware design. A marketplace for hardware engineering…

B2B
B2B -> Engineering, Product and Design
Toronto, ON, Canada
Hardware
Marketplace

Upverter is social making. The best way to collaborate with others. Discover, share and work on hardware. Unlike existing design tools, which are isolated and single user, Upverter is highly integrated, inherently colla…

11
Stephen Hamer

User retention as a service. Drip email

B2B
B2B -> Marketing
San Francisco, CA, USA
SaaS
Marketing

userfox is a SaaS product that helps companies improve user retention through welcome, inactivity and custom trigger based emails. We're building a company. Not a product, and certainly not a feature. We believe that mak…

2
Cesar Alaniz
Peter Clark

Venue marketplace.

B2B
B2B -> Office Management
San Francisco, CA, USA
Marketplace

Find the perfect venue for your next event! Venuetastic is an event venue marketplace that is changing the way people discover and book venues. We're passionate about streamlining the most painful part of event planning…

2
Christine Yen
Lena Belkor (Belogolova)

All-in-one apartment Marketing Platform for brokerages and landlords.

Real Estate and Construction
Real Estate and Construction -> Housing and Real Estate
Remote
SaaS
Real Estate

You Got Listings is an all-in-one apartment Marketing Platform for brokerages and management companies. Founded in 2009, You Got Listings through innovation and automation has helped push over 3 Million properties in fro…

3
Gordon Chen
Yanjun (Yan) Li