Y Combinator
Startup accelerator that invests in early-stage companies through a three-month program offering seed funding, mentorship and access to investors.
AcceleratorSan Francisco, United States
- Deals
- 68
- Rounds led
- 10
- VP50 companies
- 5
- First deal
- 2009
- Latest deal
- Aug 2026
Portfolio
| Company | VP50 | Rounds | Latest |
|---|---|---|---|
| Whatnot | #39 | Led Series B and C, in Seed, Series A, Series D, Series E, Series F, and Series G | Aug 2026 |
| Supabase | — | In Seed, Series C, Series D, Series E, and Series F | Jun 2026 |
| Replit | #46 | Led Accelerator, in Seed, Series A, Series B extension, Series C, and Series D | Mar 2026 |
| Kalshi | #24 | In Accelerator, Seed, Series A, and Series E | Dec 2025 |
| Rippling | #40 | In Seed, Series A, Series B, Series C, Series D, and Series G | May 2025 |
| Flock Safety | — | In Series A-1, Series C, and Series H | Mar 2025 |
| Scale AI | — | In Series B, Series E, Series F, and Seed | May 2024 |
| Deel | #34 | Led Series C, in Series D and Series D extension | May 2022 |
| Faire | — | Led Series C, in Seed, Series D, Series E, Series F, and Series G extension | May 2022 |
| Brex | — | Led Series B, in Series C-2 and Series D | Apr 2021 |
| Monzo | — | Led Series F, in Down round | Jun 2020 |
| Relativity Space | — | In Series A, B, and C | Oct 2019 |
| GitLab | — | In Series B and E | Sep 2019 |
| Benchling | — | In Series C | Jul 2019 |
| DoorDash | — | In Series F | Feb 2019 |
| Coinbase | — | In Series E | Oct 2018 |
| Gusto | — | Led Series C | Jul 2018 |
| OpenSea | — | Led Funding round | 2018 |
| Ginkgo Bioworks | — | In Series B and D | Dec 2017 |
| Instacart | — | In Series D | Mar 2017 |
| GrubMarket | — | In Series A | Sep 2015 |
| Flexport | — | In Seed and Series A | Aug 2015 |
| Helion Energy | — | In Series A | Aug 2014 |
| Airbnb | — | Led Funding round | 2009 |
