What they do:
We’re building the world’s bank payment network.
Quick facts:
HQ: London, United Kingdom
Y Combinator Summer 2011 Startups
This list has 60 startups and was last updated on Oct 15, 2026. 8 of them are hiring right now. Biggest hubs: San Francisco (46), New York (6), and Chicago (3). Largest teams: GoCardless, Segment, and Firebase.
60 startupsPage 1 of 2
HackerRank
Hiring
What they do:
Change the world to value skills over pedigree
Quick facts:
HQ: San Francisco, CA, United States
Apollo
Hiring
What they do:
Apollo helps engineering teams accelerate delivery
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Video for business.
Quick facts:
OneSignal
Hiring
What they do:
Engage customers through personalized omni-channel messaging
Quick facts:
HQ: San Francisco, CA, United States
Quartzy
Hiring
What they do:
Marketplace for life science supplies.
Quick facts:
HQ: San Francisco, CA, United States
What they do:
LeadGenius is an account-based marketing and lead generation…
Quick facts:
HQ: San Francisco, CA, United States
Streak
Hiring
What they do:
Streak transforms Gmail into a powerful CRM
Quick facts:
HQ: San Francisco, CA, United States
MixRank
Hiring
What they do:
Data products for sales, marketing, finance, recruiting, and more.
Quick facts:
What they do:
The platform for your visual media.
Quick facts:
HQ: San Francisco, CA, United States
AgileMD
Hiring
What they do:
Predictive analytics and clinical pathways for hospitals
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Marketplace for Video Production Services. We help you hire the best…
Quick facts:
HQ: San Francisco, CA, United States
Sift
Hiring
What they do:
The Leader in Digital Trust & Safety
Quick facts:
HQ: San Francisco, CA, United States
Segment
Acquired
What they do:
Software and APIs to collect, clean, and control customer data.
Quick facts:
HQ: San Francisco, CA, United States
Codecademy
Acquired
What they do:
The leading online learning platform for technical skills.
Quick facts:
HQ: New York, NY, United States
Firebase
Acquired
What they do:
Build and grow iOS, Android, and Web apps.
Quick facts:
HQ: San Francisco, CA, United States
Zeus
Acquired
What they do:
Tech-enabled property manager focused on corporate rentals; Acquired…
Quick facts:
HQ: San Francisco, CA, United States
Genius
Acquired
What they do:
Music Intelligence
Quick facts:
HQ: New York, NY, United States
Realm
Acquired
What they do:
Better data structures = no DB.
Quick facts:
HQ: San Francisco, CA, United States
Caviar
Acquired
What they do:
Uber for food.
Quick facts:
HQ: San Francisco, CA, United States
Compose
Acquired
What they do:
We make it easy to run databases. PostgreSQL, Redis, MongoDB,…
Quick facts:
HQ: San Francisco, CA, United States
Automatic
Acquired
What they do:
Automatic connects your car to the rest of your digital life.
Quick facts:
HQ: San Francisco, CA, United States
Science Exchange
Acquired
What they do:
Powering scientific outsourcing
Quick facts:
HQ: San Francisco, CA, United States
Citus Data
Acquired
What they do:
Real-time. Big data. PostgreSQL
Quick facts:
HQ: San Francisco, CA, United States
Clerky
Acquired
What they do:
Makes legal paperwork easy for startups and their attorneys.
Quick facts:
HQ: San Francisco, CA, United States
Aisle50
Acquired
What they do:
Grocery deals.
Quick facts:
HQ: Chicago, IL, United States
Pagelever
Acquired
What they do:
Facebook analytics. Acquired by Unified in January 2013.
Quick facts:
HQ: San Francisco, CA, United States
GlassMap
Acquired
What they do:
Location sharing. Acquired by Groupon in 2013.
Quick facts:
HQ: San Francisco, CA, United States
Perfect Audience
Acquired
What they do:
Self-service display advertising for SaaS and online retail.
Quick facts:
HQ: San Francisco, CA, United States
Parse
Acquired
What they do:
Parse is the easiest way to build apps.
Quick facts:
HQ: San Francisco, CA, United States
Freshplum
Acquired
What they do:
Analytics with action
Quick facts:
HQ: San Francisco, CA, United States
Cryptoseal
Acquired
What they do:
Server key management, VPN as a Service, Privacy VPN. Sold to…
Quick facts:
HQ: San Francisco, CA, United States
Clutch
Acquired
What they do:
An easy to integrate library for native iOS applications designed to…
Quick facts:
HQ: San Francisco, CA, United States
Stypi
Acquired
What they do:
Realtime collaborative coding
Quick facts:
HQ: San Francisco, CA, United States
Debteye
Acquired
What they do:
Automate credit counseling.
Quick facts:
HQ: Chicago, IL, United States
Fobo
Acquired
What they do:
Sell to people nearby.
Quick facts:
HQ: San Francisco, CA, United States
Questions and answers
How many startups are on this list?
There are 60 startups on this list, last updated on Oct 15, 2026.
Which of them are hiring?
8 of them are hiring right now, including HackerRank, Apollo, and OneSignal.
Which of them have the largest teams?
By team size: GoCardless (900 employees), Segment (550 employees), and Firebase (500 employees).
Where are they based?
The biggest hubs are San Francisco (46), New York (6), and Chicago (3).