Y Combinator
Venture Capital and Private Equity PrincipalsUnited States5001-10000 Employees
Y Combinator is a United States-based startup accelerator and venture capital organization operating in the venture capital and private equity sector. Since its founding in 2005, YC has invested in over 5,400 companies, including Airbnb, Dropbox, Stripe, Reddit, Instacart, DoorDash, and Coinbase. The firm describes itself as building a large startup community and offering products and programs to support founders throughout their company's life. The organization employs between 5,001 and 10,000 people and is headquartered in the United States. In 2026, YC engaged in several portfolio activities, including investments in companies such as Flagright Data Technologies and Leadbay, and announced product initiatives like Paxel.