All 60 companies in Y Combinator's Summer 2011 batch, with team size, growth, open roles and funding.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
| Company | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|
Change the world to value skills over pedigree | 2,231 | +4% | +14% | 3 | $103M | Series D$60M, Mar 2022 |
We’re building the world’s bank payment network. | 862 | +1% | +2% | 0 | $529M | Series G$312M, Feb 2022 |
Music Intelligence | 839 | +5% | +12% | 0 | $77.7M | Undisclosed round$5.8M, Sep 2020 |
Language learning through video chat. | 493 | +1% | 0% | 0 | $1M | Seed$1M, Dec 2014 |
LeadGenius is an account-based marketing and lead generation… | 398 | −3% | −3% | 0 | $30.4M | Seed$3M, Sep 2019 |
The leading online learning platform for technical skills. | 391 | −2% | −9% | 0 | $87.5M | Series D$40M, Feb 2021 |
The Leader in Digital Trust & Safety | 283 | +6% | −12% | 4 | $157M | Secondary$50M, Feb 2022 |
Uber for food. | 278 | +1% | +1% | 0 | $15M | Series A$13M, Apr 2014 |
Apollo helps engineering teams accelerate delivery | 166 | −2% | −13% | 8 | $183M | Undisclosed round$130M, Mar 2022 |
Engage customers through personalized omni-channel messaging | 165 | −5% | −1% | 8 | $82M | Series C$50M, Jan 2023 |
Video for business. | 148 | −6% | −12% | 1 | $90.9M | Undisclosed round$15.2M, Apr 2024 |
Powering scientific outsourcing | 129 | +4% | +8% | 0 | $77.5M | Undisclosed round$20M, Oct 2019 |
Data products for sales, marketing, finance, recruiting, and more. | 100 | +30% | +117% | YC | $2M | Debt$250K, Feb 2016 |
Marketplace for life science supplies. | 94 | −1% | +4% | 1 | $50.2M | Debt$23M, Apr 2026 |
Parse is the easiest way to build apps. | 93 | 0% | 0% | 0 | $7M | Pre-seed$5.5M, Oct 2022 |
The platform for your visual media. | 41 | −5% | −5% | 0 | $11.2M | Series A$4M, Oct 2016 |
Streak transforms Gmail into a powerful CRM | 40 | +5% | +5% | YC | $1.9M | Seed$1.9M, Oct 2012 |
Makes legal paperwork easy for startups and their attorneys. | 34 | +10% | +48% | 0 | SeedJun 2011 | |
Predictive analytics and clinical pathways for hospitals | 20 | 0% | +11% | 0 | $2M | Seed$2M, Jun 2012 |
Quad is where college students get things done. | 16 | 0% | 0% | 0 | SeedAug 2011 | |
Marketplace for Video Production Services. We help you hire the best… | 4 | −20% | −20% | 0 | $1.1M | Seed$1.1M, May 2015 |
Real-time. Big data. PostgreSQL | 3 | 0 | $13.2M | Undisclosed round$9.5M, Jan 2018 | ||
Analytics with action | 1 | 0 | $2.5M | Seed$1M, Feb 2014 | ||
Hyperlinking the real world. | 1 | 0 | SeedAug 2011 | |||
Online auto and business insurance. (Acquired 2013) | 1 | 0 | $675K | Seed$675K, Dec 2012 | ||
An easy to integrate library for native iOS applications designed to… | ||||||
Realtime collaborative coding | 0 | SeedAug 2011 | ||||
Layer above Kinect. | 0 | $150K | YC investment$150K, Aug 2011 | |||
Grocery deals. | 0 | $5.2M | Series A$2.6M, Aug 2013 | |||
Automate credit counseling. | 0 | SeedAug 2011 | ||||
Javascript proxy. | ||||||
The Phone System for Sales Teams. | 0 | SeedAug 2011 | ||||
Server key management, VPN as a Service, Privacy VPN. Sold to… | ||||||
Software and APIs to collect, clean, and control customer data. | ||||||
Dubjoy translates and voice-overs your video to any language | 0 | SeedJul 2012 | ||||
Brings dozens of SaaS's (Mailchimp, Stripe, Shopify, Salesforce,… | ||||||
Better data structures = no DB. | ||||||
Build and grow iOS, Android, and Web apps. | ||||||
Facebook analytics. Acquired by Unified in January 2013.
| ||||||
Generate stories from SEC filings. | ||||||
Sell to people nearby. | ||||||
Public transit apps. Acquired by Apple in 2013. | ||||||
Create & Share Product Roadmaps | ||||||
The #1 private social network | 0 | SeedApr 2012 | ||||
Yelp for service pros. | ||||||
Send and print photo albums with people you love.
Acquired by Lyft | ||||||
In-video advertising. | ||||||
Creativity at Play. Tablet toys. Acquired by Google, 2015. | 0 | $1.1M | Undisclosed round$750K, Nov 2011 | |||
We make it easy to run databases.
PostgreSQL, Redis, MongoDB,… |
Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.
Each company is matched to Crustdata by its website. Crustdata adds team size and its change over 6 and 12 months, open roles from job postings, reported funding, and founders' past employers.
Hiring the most counts distinct roles posted in the last 60 days. Growth needs 10+ people today, shrinking 20+ a year ago, so tiny teams do not top the lists. Rebuilt every week.
The numbers on this page come from three Crustdata API calls. Crustdata tags 5,000+ companies with Y Combinator as an investor; swap the filter for any investor, industry or headcount range and track your own list, with founders' work emails one call away.
# 1. every company with Y Combinator as an investor curl https://api.crustdata.com/company/search \ -H "authorization: Bearer $CRUSTDATA_API_KEY" \ -H "x-api-version: 2025-11-01" \ -d '{ "filters": { "field": "funding.investors", "type": "in", "value": ["Y Combinator"] }, "fields": ["basic_info.name", "headcount.total", "headcount.growth_percent", "funding.total_investment_usd"], "limit": 100 }' # 2. open listings per company, last 60 days (limit 0 = counts only) curl https://api.crustdata.com/job/search \ -H "authorization: Bearer $CRUSTDATA_API_KEY" \ -H "x-api-version: 2025-11-01" \ -d '{ "filters": { "op": "and", "conditions": [ { "field": "company.basic_info.company_id", "type": "in", "value": [...] }, { "field": "metadata.date_added", "type": "=>", "value": "2026-08-24" } ]}, "limit": 0, "aggregations": [{ "type": "group_by", "field": "company.basic_info.company_id", "agg": "count" }] }' # 3. the same company filter as a weekly watch: POST /watch/company/search
60 companies were in Y Combinator's Summer 2011 batch (S11); 12 are active.
6 companies posted roles in the last 60 days, led by Apollo (8 roles), OneSignal (8 roles) and Sift (4 roles). 7 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): MixRank (+30%), Sift (+6%) and Streak (+5%).
No reported rounds after their YC batch in the last 12 months.