United States · 
Who invested in Y Combinator?
Y Combinator's investors include Sequoia Capital, Ron Conway, Paul Buchheit, XG Ventures and Aydin Senkut.
2010
$2.0MVenture$8.3MVentureUnited States · Venture startup
Who invested in Y Combinator
2 rounds we have observed, with the 5 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Funding summaryUpdated 26 Oct 2026
$10Mraised across 2 rounds since 2009, from 2 sources
$2.0MVenture$8.3MVenture
- Latest round
- Venture, $8.3MMay 2010
- Step-upi
- 4.1×
- Investors
- 5
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Venture, $2.0M Mar 2009
- Biggest round
- $8.3M Venture · May 2010
- Between rounds
- 14 months from the last two
The rounds
- May 2010
- Mar 2009
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Y Combinator
How much has Y Combinator raised?
Y Combinator has raised $10M across 2 rounds since 2009.
When did Y Combinator last raise?
Y Combinator's most recent round was a Venture of $8.3M in May 2010.
What was Y Combinator's biggest round?
Its most recent round, $8.3M in May 2010, is also its largest on record.
Who backed Y Combinator first?
Y Combinator's first round on record, in Mar 2009, was backed by Sequoia Capital, Ron Conway and Paul Buchheit and 1 others.
What stage is Y Combinator at?
Y Combinator's latest named round is a Venture, in May 2010.
Where is Y Combinator based?
Y Combinator is based in the United States.
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