Track Y-Combinator's Investment Activity
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Y-Combinator
Invests 500,000 dollars in startups at the earliest stage, including companies with no revenue or product, in batches four times a year.
What they invest in
Based on the funding rounds Y-Combinator joined in the last 2 years.
Who they invest alongside
Firms that joined the same rounds as Y-Combinator in the last 2 years
Most recently together in River AI (Venture - Series Unknown, $1.1B)
Most recently together in Flock Safety (Venture - Series Unknown, $275M)
Investors like this one
They back the same kinds of companies at the same stages
Both back seed-stage Software; 32 shared portfolio companies
Both back seed-stage Information Technology; 12 shared portfolio companies
Both back Series A Software; 13 shared portfolio companies
An open application, and it is the fund's real front door rather than a side channel. Applications run on a batch cycle: the Fall 2026 batch is October to December in San Francisco, late applications are still accepted after the regular deadline, and YC says only that if the application is promising they will invite you to interview. The program includes a three-day in-person kick-off in San Francisco.
apply.ycombinator.com/homeBatch-based. Check the current batch dates before applying.
Worth knowing. There is no referral requirement and no restriction on who may apply, which makes this one of the few genuinely open doors among the largest investors. The trade is that acceptance means joining a batch in person in San Francisco.
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