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Y Combinator

Y Combinator is the world's most successful startup accelerator, founded in 2005 by Paul Graham, Jessica Livingston, Trevor Blackwell, and Robert Tappan Morris. YC has funded over 4,500 companies with a combined valuation exceeding $600 billion, including Airbnb, Stripe, Coinbase, Dropbox, DoorDash, Reddit, and Instacart. The accelerator invests $500,000 in each startup for a standard equity stake, providing founders with mentorship, a powerful alumni network, and access to follow-on capital through Demo Day presentations. YC has been a prolific source of AI companies, incubating many of the most promising startups in the generative AI wave. The accelerator's AI cohorts have grown dramatically, reflecting the massive opportunity in the space.

Accelerator
AI Deals
22
Portfolio Companies
22
Lead Rounds
2
Website
Investment Activity
Proception
Undisclosed
Jun 29, 2026
$11M
Pocket
Undisclosed
Jun 29, 2026
$11M
Warp
Undisclosed
Jun 25, 2026
$60M
Prosper AI
Series A
Jun 23, 2026
$30M
Flagright
Undisclosed
Jun 17, 2026
$13M
Bland
Undisclosed
Jun 16, 2026
$50M
Supabase
Undisclosed
Jun 5, 2026
$500M
Upstream
Undisclosed
Lead
Jun 3, 2026
$3M
Corgi
Undisclosed
May 28, 2026
$106M
Triomics
Series B
May 27, 2026
$22M
Nourish
Undisclosed
May 20, 2026
$100M
Leadbay
Seed
Lead
May 19, 2026
$4M
Status AI
Seed and Series A
May 19, 2026
$17M
Fazeshift
Series A
May 7, 2026
$17M
Legora
Series D
Apr 30, 2026
$550M
Lua
Undisclosed
Apr 16, 2026
$6M
Trayd
Series A
Mar 25, 2026
$10M
Glimpse
Series A
Mar 25, 2026
$35M
Juicebox
Undisclosed
Mar 11, 2026
$80M
AgentMail
Undisclosed
Mar 10, 2026
$6M
Humand
Undisclosed
Feb 23, 2026
$66M
Scale AI
Series E
May 15, 2024
$325M
Frequently Asked Questions
How many AI deals has Y Combinator made?
Y Combinator has participated in 22 AI funding rounds tracked in our database, leading 2 of them.
What AI companies has Y Combinator invested in?
Y Combinator's AI portfolio includes Proception, Pocket, Warp, Prosper AI, Flagright, and 17 more.
What AI sectors does Y Combinator focus on?
Y Combinator invests across AI sectors including AI Robotics, AI Consumer Hardware, Enterprise AI, AI Healthcare, and 5 more.
What type of investor is Y Combinator?
Y Combinator is classified as a accelerator investor. Y Combinator is the world's most successful startup accelerator, founded in 2005 by Paul Graham, Jessica Livingston, Trevor Blackwell, and Robert Tappan Morris. YC has funded over 4,500 companies with a combined valuation exceeding $600 billion, including Airbnb, Stripe, Coinbase, Dropbox, DoorDash, Reddit, and Instacart. The accelerator invests $500,000 in each startup for a standard equity stake, providing founders with mentorship, a powerful alumni network, and access to follow-on capital through Demo Day presentations. YC has been a prolific source of AI companies, incubating many of the most promising startups in the generative AI wave. The accelerator's AI cohorts have grown dramatically, reflecting the massive opportunity in the space.