Y Combinator is a startup accelerator founded in 2005 that funds early-stage companies through its batch program.
Inception companies backed by Y Combinator
Alex
AI coding assistant for Apple's Xcode IDE; team acqui-hired by OpenAI in 2025
developer toolsai agentsCohort 6 · pre seed · acquiredApril
Voice-first AI executive assistant for managing email and calendar hands-free
productivityai agentsCohort 10 · pre seedBeeSafe Labs
AI fraud-prevention platform whose agents engage scammers to disrupt scam networks
securityai agentsfintechCohort 11 · pre seedMem0
Cohort 9 · series aReprompt AI
AI data agents that extract structured data from documents and websites (KYB, location).
ai agentsdeveloper toolsdata analyticsCohort 7 · pre seedTrellis
AI agents that automate healthcare administrative paperwork like prior authorizations and appeals.
healthtechai agentsCohort 3 · pre seed