Investor Profile

Y Combinator

AcceleratorMountain View / San Francisco, US
The downtown San Francisco skyline from Potrero Hill
Y Combinator is based in Mountain View / San Francisco, US. Pictured: San Francisco.San Francisco — photo by Andreas Praefcke, CC BY 3.0, Wikimedia Commons

Quick facts

Type
Accelerator
Headquarters
Mountain View / San Francisco, US
Founded
2005

About

The best-known startup accelerator in the world, running twice-yearly batches that fund a small, fixed amount per company in exchange for equity, plus mentorship and a demo day. Alumni include Airbnb, Stripe and Nubank.

Companies backed on our watchlist

  • Cacao — Cross-border fintech (Seed)
  • Ploy — Marketing SaaS (Seed)
  • 9 Mothers — Defense tech (YC Spring 2026)
  • Dispatch — Space (YC Spring 2026)
  • Adialante — Healthcare (YC Spring 2026)
  • Silmaril — AI security (YC Spring 2026)
  • Arga Labs — AI infrastructure (YC Spring 2026)
  • Sazabi — AI infrastructure (YC Spring 2026)
  • Tasklet — AI agents (YC Spring 2026)
  • Superset — Developer tools (YC Spring 2026)
  • Lightsprint — Developer tools (YC Spring 2026)
  • Complir — Compliance SaaS (YC Spring 2026)
  • Uno Wallet — Consumer fintech (YC Spring 2026)

Before you read anything into this

Profiling Y Combinator here is informational, not a recommendation. Almost all venture funds only accept institutional or high-net-worth limited partners with minimums far beyond most individual investors — see our guide to venture funds for how that actually works.

Understand how venture funds actually work for an LP:
Venture funds explained →

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Accelerator capital is priced differently

Programs that combine a small cheque with a fixed-term cohort are buying equity at the earliest and least measurable point in a company's life. The stated terms — a set amount for a set percentage — look simple, but the effective valuation they imply is usually far below what the company could raise a year later, which is the trade the founder is making in exchange for the network, the structure and the credibility signal.

For an individual investor, the relevant point is what an accelerator badge does and does not tell you. It says a selection process filtered this company in, and that early paperwork is likely to be standard rather than improvised. It says nothing about whether the price you are being offered now is reasonable — accelerator alumni raise at every kind of valuation, sensible and otherwise.

Frequently asked questions

Can I invest alongside Y Combinator?
Almost certainly not directly. Funds like this generally raise from institutional and high-net-worth limited partners under private-placement rules, not the general public. The realistic routes into early-stage deals are regulated equity crowdfunding, a syndicate, or a retail-accessible venture fund — see our guide to the four routes.
Does Y Combinator backing a company mean it's a good investment?
No. A fund backing a round is a signal about that fund's own thesis, not an endorsement we make. We have not done diligence on either the fund or the companies it backs.
Where does this information come from?
Compiled from public reporting (fund websites, Crunchbase, PitchBook, press coverage) as of the review date above. Fund details — AUM, focus, active funds — change; verify anything load-bearing against the fund's own site.