YC
Y Combinator
Accelerator · Founded 2005 · Active in 2026
Y Combinator is the original startup accelerator, founded in Mountain View in 2005 by Paul Graham, Jessica Livingston, Robert Morris, and Trevor Blackwell. YC invented the batch model — a uniform pre-seed cheque, a twelve-week program, and Demo Day — and runs two cohorts a year. Alumni include Airbnb, Stripe, DoorDash, Coinbase, Reddit, and Dropbox.
The Bookface alumni forum and the YC network are widely cited as the firm's defining edge. The portfolio numbers on this profile cover only outcomes Dealroom measures for the Power Law ranking ($25M+ revenue, $100M+ revenue, or unicorn status) — Dealroom's broader dataset tracks the full Y Combinator alumni base, which is several times larger.
The 149 Y Combinator Power Law outcomes ($100M+ revenue or $1B+ valuation).
Snapshot of where the outcomes are concentrated by country, sector, and stage entered.
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USA131
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India4
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UK2
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Mexico2
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Indonesia2
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Senegal1
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Colombia1
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Australia1
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Decentralised1
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France1
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Sweden1
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Singapore1
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Fintech33
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Other B2B Software24
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Marketing16
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AI15
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eCommerce & Marketplaces11
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Cybersecurity8
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Edtech8
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Transportation7
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Health Tech & Medtech7
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Biotech & Life Sciences6
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Other6
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Space4
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Series B+13
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Series A1
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Seed134
Y Combinator's 149 Power Law outcomes.
Where Y Combinator's founders come from — and where they study.
335 founders across the 149 Power Law outcomes — split by country of origin, university attended, and the company they worked at before founding. Stanford University and Alphabet | Google are the deepest single pipelines.
Key people at Y Combinator.
How does Y Combinator stack up?
Y Combinator in orange, your selection in blue and other colours. Pick from the global roster of 34 peer investors — scope by startup location or hit "Find similar shapes" to auto-pick the three closest. The funnel matrix mirrors the spider chart on the ranking page; the line chart shows each firm's share of unicorns minted in the selected startup location — peaks reveal vintage years.
Share of new unicorns per year
% of global unicorns minted that year, year by year · hover the chart to see which unicornsStage focus
Companies by entry stage and outcome tierSector focus
Companies per investor across the 10 highest-volume sectorsSentiment on X
What X is saying about Y Combinator
An AI-synthesized read of the highest-engagement posts about Y Combinator on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
In the news
Latest news about Y Combinator
Recent press, funding announcements, and portfolio moves mentioning Y Combinator — pulled live from Dealroom's news feed.
Want the full picture on Y Combinator?
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