YC companies funded in 2011

Batches in 2011

• Summer 2011 — 60 companies
• Winter 2011 — 45 companies

All 2011 YC companies by team size

• GOAT Group (Winter 2011 · 1600 people) — Platform for the greatest products from the past, present and future.
• GoCardless (Summer 2011 · 900 people) — We’re building the world’s bank payment network.
• Segment (Summer 2011 · 550 people) — Software and APIs to collect, clean, and control customer data.
• Firebase (Summer 2011 · 500 people) — Build and grow iOS, Android, and Web apps.
• HackerRank (Summer 2011 · 300 people) — Change the world to value skills over pedigree
• Codecademy (Summer 2011 · 225 people) — The leading online learning platform for technical skills.
• Vidyard (Summer 2011 · 201 people) — Video for business.
• Fivestars (Winter 2011 · 201 people) — Customer loyalty and payments platform for small businesses.
• Apollo (Summer 2011 · 200 people) — Apollo helps engineering teams accelerate delivery
• Zeus (Summer 2011 · 200 people) — Tech-enabled property manager focused on corporate rentals; Acquired…
• OneSignal (Summer 2011 · 150 people) — Engage customers through personalized omni-channel messaging
• DrChrono (Winter 2011 · 150 people) — The essential platform for modern medical practices and patients.
• SingleStore (Winter 2011 · 150 people) — The cloud-native, operational database built for speed and scale.
• Tremendous (Winter 2011 · 150 people) — How businesses send money to people at scale. Fast, free, global.
• Zerocater (Winter 2011 · 140 people) — Zerocater is revolutionizing how companies feed their employees
• Close (Winter 2011 · 120 people) — CRM and sales automation tools for startups and SMBs
• Genius (Summer 2011 · 101 people) — Music Intelligence
• HelloSign (Winter 2011 · 100 people) — eSignature software for small and mid-market businesses.
• Quartzy (Summer 2011 · 100 people) — Marketplace for life science supplies.
• Humble Bundle (Winter 2011 · 100 people) — Pay what you want for awesome games and other content while giving to…
• Talkable (Winter 2011 · 76 people) — Online store referrals.
• Realm (Summer 2011 · 51 people) — Better data structures = no DB.
• Comprehend (Winter 2011 · 51 people) — SaaS to increase speed and quality of clinical trials.
• Tutorspree (Winter 2011 · 51 people) — Online tutoring marketplace.
• Automatic (Summer 2011 · 51 people) — Automatic connects your car to the rest of your digital life.
• Mailgun (Winter 2011 · 51 people) — Email API service.
• Pebble (Winter 2011 · 51 people) — Watch that helps you get shit done and limit the mayhem of…
• Caviar (Summer 2011 · 51 people) — Uber for food.
• Compose (Summer 2011 · 51 people) — We make it easy to run databases. PostgreSQL, Redis, MongoDB,…
• Apportable (Winter 2011 · 51 people) — iOS porting
• Science Exchange (Summer 2011 · 50 people) — Powering scientific outsourcing
• LeadGenius (Summer 2011 · 50 people) — LeadGenius is an account-based marketing and lead generation…
• OrderAhead (Winter 2011 · 50 people) — Order ahead for pickup
• Citus Data (Summer 2011 · 45 people) — Real-time. Big data. PostgreSQL
• Clerky (Summer 2011 · 35 people) — Makes legal paperwork easy for startups and their attorneys.
• Streak (Summer 2011 · 35 people) — Streak transforms Gmail into a powerful CRM
• Imgix (Summer 2011 · 34 people) — The platform for your visual media.
• MixRank (Summer 2011 · 31 people) — Data products for sales, marketing, finance, recruiting, and more.
• AgileMD (Summer 2011 · 19 people) — Predictive analytics and clinical pathways for hospitals
• Earbits (Winter 2011 · 15 people) — Google AdWords for music. Allowing bands and labels to bid for…
• Storyworth (Winter 2011 · 13 people) — Record your family stories and print them in beautiful keepsake books.
• Quad (Summer 2011 · 12 people) — Quad is where college students get things done.
• GlassMap (Summer 2011 · 11 people) — Location sharing. Acquired by Groupon in 2013.
• Ridejoy (Summer 2011 · 11 people) — Long-distance carpooling marketplace. Shut down in early 2013.
• Kicksend (Summer 2011 · 11 people) — Send and print photo albums with people you love. Acquired by Lyft
• Snapjoy (Summer 2011 · 11 people) — Photo library.
• Parse (Summer 2011 · 11 people) — Parse is the easiest way to build apps.
• Inporia (Winter 2011 · 11 people) — Fashion shopping email list.
• Upverter (Winter 2011 · 11 people) — The future of hardware design. A marketplace for hardware engineering…
• Custora (Winter 2011 · 11 people) — Custora is a predictive analytics platform for e-commerce marketing…
• Aisle50 (Summer 2011 · 11 people) — Grocery deals.
• Insight Data Science (Winter 2011 · 11 people) — Turning PhDs & engineers into data scientists & data engineers
• PayDragon (Summer 2011 · 11 people) — Hyperlinking the real world.
• Perfect Audience (Summer 2011 · 11 people) — Self-service display advertising for SaaS and online retail.
• Rentobo (Summer 2011 · 11 people) — The easiest way to find a tenant. Rentobo is a tool that makes it…
• Pagelever (Summer 2011 · 11 people) — Facebook analytics. Acquired by Unified in January 2013.
• Balanced (Winter 2011 · 11 people) — Payments for Marketplaces
• Videopixie (Summer 2011 · 11 people) — Marketplace for Video Production Services. We help you hire the best…
• Hyperink (Winter 2011 · 11 people) — Ebook publisher.
• Opez (Summer 2011 · 11 people) — Yelp for service pros.
• Mino Games (Winter 2011 · 11 people) — Mobile games company
• Freshplum (Summer 2011 · 8 people) — Analytics with action
• PhoneSys (Summer 2011 · 4 people) — The Phone System for Sales Teams.
• Cryptoseal (Summer 2011 · 3 people) — Server key management, VPN as a Service, Privacy VPN. Sold to…
• You Got Listings (Winter 2011 · 3 people) — All-in-one apartment Marketing Platform for brokerages and landlords.
• Leaky (Summer 2011 · 2 people) — Online auto and business insurance. (Acquired 2013)
• Everyme (Summer 2011 · 2 people) — The #1 private social network
• Assembled (Winter 2011 · 2 people) — Pivoted to TenXList, a professional network of top college engineers.
• Instapainting (Winter 2011 · 2 people) — Custom-made artwork from artists e-commerce marketplace.
• Stypi (Summer 2011 · 2 people) — Realtime collaborative coding
• Zigfu (Summer 2011 · 2 people) — Layer above Kinect.
• Interstate (Summer 2011 · 2 people) — Create & Share Product Roadmaps
• Zenbox (Summer 2011 · 2 people) — Brings dozens of SaaS's (Mailchimp, Stripe, Shopify, Salesforce,…
• Hotspots (Winter 2011 · 2 people) — Real-time analytics (acq by TWTR, 2012)
• Vapor (Summer 2011 · 2 people) — In-video advertising.
• Embark (Summer 2011 · 2 people) — Public transit apps. Acquired by Apple in 2013.
• Userfox (Winter 2011 · 2 people) — User retention as a service. Drip email
• Dubjoy (Summer 2011 · 2 people) — Dubjoy translates and voice-overs your video to any language
• Fobo (Summer 2011 · 2 people) — Sell to people nearby.
• Flotype (Winter 2011 · 2 people) — Third generation of web apps.
• Verbling (Summer 2011 · 2 people) — Language learning through video chat.
• Convore (Winter 2011 · 2 people) — Hosted IRC and so much more.
• TrustEgg (Winter 2011 · 2 people) — Trust funds.
• Launchpad Toys (Summer 2011 · 2 people) — Creativity at Play. Tablet toys. Acquired by Google, 2015.
• SimplyListed (Winter 2011 · 2 people) — Sell your stuff.
• Beetailer (Winter 2011 · 2 people) — Facebook stores.
• TellFi (Winter 2011 · 2 people) — Google Voice for business.
• Sendoid (Winter 2011 · 2 people) — High speed peer to peer data transport technology for consumers…
• Siasto (Winter 2011 · 2 people) — Siasto is a collaboration tool designed for SMBs who use Google Apps,…
• Picplum (Summer 2011 · 2 people)
• Clutch (Summer 2011 · 2 people) — An easy to integrate library for native iOS applications designed to…
• MarketBrief (Summer 2011 · 2 people) — Generate stories from SEC filings.
• Debteye (Summer 2011 · 2 people) — Automate credit counseling.
• TapEngage (Summer 2011 · 2 people) — Touch-friendly marketing, acquired by Dropbox
• Lanyrd (Winter 2011 · 2 people) — IMDB of conferences.
• Hungry Labs (Summer 2011 · 2 people) — Now part of Snaplayer.
• FitFu (Winter 2011 · 2 people) — New projects
• Venuetastic (Winter 2011 · 2 people) — Venue marketplace.
• Tumult (Winter 2011 · 1 people) — Tumult is building the next generation of apps for web design. Our…
• Draft (Summer 2011 · 1 people) — Making Draft. Super simple version control and collaboration for…
• AppHarbor (Winter 2011 · 1 people) — .NET Cloud Platform as a Service
• Sift (Summer 2011) — The Leader in Digital Trust & Safety
• Proxino (Summer 2011) — Javascript proxy.
• TalkBin (Winter 2011) — Consumer to business messaging.
• Acunote (Winter 2011)