YC Summer 2011 B2B Startups

Y Combinator's Summer 2011 batch included 30 B2B startups. Of these, 11 remain active, 13 have been acquired, and 6 have shut down.

• Clerky (35 people) — Makes legal paperwork easy for startups and their attorneys.
• Firebase (500 people) — Build and grow iOS, Android, and Web apps.
• Cryptoseal (3 people) — Server key management, VPN as a Service, Privacy VPN. Sold to…
• Vidyard (201 people) — Video for business.
• Parse (11 people) — Parse is the easiest way to build apps.
• HackerRank (300 people) — Change the world to value skills over pedigree
• Stypi (2 people) — Realtime collaborative coding
• Interstate (2 people) — Create & Share Product Roadmaps
• Segment (550 people) — Software and APIs to collect, clean, and control customer data.
• Citus Data (45 people) — Real-time. Big data. PostgreSQL
• Zenbox (2 people) — Brings dozens of SaaS's (Mailchimp, Stripe, Shopify, Salesforce,…
• Realm (51 people) — Better data structures = no DB.
• OneSignal (150 people) — Engage customers through personalized omni-channel messaging
• LeadGenius (50 people) — LeadGenius is an account-based marketing and lead generation…
• MixRank (31 people) — Data products for sales, marketing, finance, recruiting, and more.
• Perfect Audience (11 people) — Self-service display advertising for SaaS and online retail.
• Draft (1 people) — Making Draft. Super simple version control and collaboration for…
• Dubjoy (2 people) — Dubjoy translates and voice-overs your video to any language
• Pagelever (11 people) — Facebook analytics. Acquired by Unified in January 2013.
• Sift — The Leader in Digital Trust & Safety
• Videopixie (11 people) — Marketplace for Video Production Services. We help you hire the best…
• Freshplum (8 people) — Analytics with action
• Clutch (2 people) — An easy to integrate library for native iOS applications designed to…
• Apollo (200 people) — Apollo helps engineering teams accelerate delivery
• Proxino — Javascript proxy.
• Imgix (34 people) — The platform for your visual media.
• Streak (35 people) — Streak transforms Gmail into a powerful CRM
• PhoneSys (4 people) — The Phone System for Sales Teams.
• Compose (51 people) — We make it easy to run databases. PostgreSQL, Redis, MongoDB,…
• TapEngage (2 people) — Touch-friendly marketing, acquired by Dropbox