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Y Combinator (YC) is the leading startup accelerator, founded in 2005 and based in San Francisco. Four times a year, YC invests $500,000 in a select group of startups through a batch program, providing mentorship, resources, and access to an alumni community. YC is broadly sector-agnostic and has funded over 5,000 companies across nearly every technology and industry vertical.
Deal activity increased 33% year-over-year (217 deals in the last 12 months). Their most common stage is seed (43% of deals). Average disclosed round size is $25.6M (across 3234 rounds with reported amounts).
Portfolio
2,447
Fund Size
—
Top Stage
Seed
Last 12 Mo
217
Team
AM
Andrew Miklas
PagerDuty, S10
AG
Ankit Gupta
Reverie Labs, W18
CG
Chris Golda
BackType, S08
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
3725 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Proception | Seed | $11M | Sep 2026 |
 VideoGen | Seed | $3.3M | Sep 2026 |
| AAdaptyv Biosystems | Series A | $40M | Aug 2026 |
 Metriport | Unknown | $26M | Aug 2026 |
 Arintra | Series B | $25M | Aug 2026 |
 Ivy Homes | Seed | $7M | Aug 2026 |
 Lamina Labs | Unknown | $3M | Aug 2026 |
 Corvus | Series C | $15M | Aug 2026 |
 Noloco | Seed | $1.4M | Aug 2026 |
 Thunder Compute | Series A | $13M | Aug 2026 |
 Blacksmith | Series B | $45M | Aug 2026 |
 HappyRobot | Series C | $150M | Aug 2026 |
| HHappyrobot Inc | Series C | $150M | Aug 2026 |
 Terminal | Unknown | $20M | Jul 2026 |
 Terminal | Series A | $20M | Jul 2026 |
 Cua | Series D | $1.5B | Jul 2026 |
 Cashboard | Seed | $5M | Jul 2026 |
 HappyRobot | Series A | $15.6M | Jul 2026 |
| HappyRobot | Series A | $15.6M | Jul 2026 |
 Unnatural Products | Series A | $30M | Jul 2026 |
 Beyond Reach Labs | Seed | $10M | Jul 2026 |
 Emergent | Series C | $130M | Jul 2026 |
 Emergent One | Series C | $130M | Jul 2026 |
 Infinia | Series A | $13.5M | Jul 2026 |
 Ollama | Series B | $65M | Jul 2026 |
Page 1 of 149
Top Co-Investors
Soma Capital156 shared
General Catalyst151 shared
SV Angel148 shared
Pioneer Fund141 shared
Sequoia Capital124 shared
Andreessen Horowitz116 shared
Accel111 shared
Khosla Ventures108 shared
Initialized Capital106 shared
Liquid 2 Ventures101 shared
Rebel Fund98 shared
FundersClub87 shared
Goodwater Capital80 shared
Tiger Global Management, LLC76 shared
Founders Fund74 shared
First Round Capital71 shared
Index Ventures65 shared
Lightspeed Venture Partners63 shared
BoxGroup53 shared
Bessemer Venture Partners52 shared
Last updated: 7 October 2026