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Y Combinator

The world's leading startup accelerator, founded 2005. Has funded 5,000+ companies including Airbnb, Stripe, OpenAI, …

Active Accelerator 🇺🇸 United States · Mountain View, United States · Since 2005
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Portfolio Active
519
Latest Kalshi
Deal flow
$3.3B
10 rounds
Unicorns
3
≥ $1B valuation
Founded
2005
21 yrs
Latest
Jan 2027
Rote

About Y Combinator

The world's leading startup accelerator, founded 2005. Has funded 5,000+ companies including Airbnb, Stripe, OpenAI, and Dropbox.

Investment activity

2023–2027
$204.3M
$66.3M
$1.5B
$445.2M
$500K
4
'23
8
'24
222
'25
231
'26
1
'27

Portfolio

24

Co-investors

8

Recent rounds

10
Jan 1, 2027 Seed $500K Lead Rote
May 19, 2026 Seed $10.5M Stilta
May 19, 2026 Series A $17M Status
May 14, 2026 Seed $6M Flick
May 7, 2026 Series A $17M Fazeshift
Apr 29, 2026 Series D $150M Hightouch
Apr 23, 2026 Seed $5M Astor
Apr 20, 2026 Seed $5.8M Lua Global Inc
Apr 15, 2026 Seed $4.5M Uplane
Apr 1, 2026 Seed $500K Lead Gigacatalyst