Y Combinator logo

Y Combinator

North America, California, United States, Mountain View

Description

Y Combinator, headquartered in Mountain View, California, stands as one of the world's most influential and prestigious startup accelerators. Founded in 2005, it pioneered the seed-stage accelerator model, providing early-stage companies with capital, mentorship, and a robust network designed to accelerate their growth. YC's rigorous program, conducted in two batches annually (Winter and Summer), culminates in a Demo Day where founders present their progress to a curated audience of investors.

The accelerator's standard investment terms are a significant draw for aspiring founders. Y Combinator typically invests $500,000 into each company accepted into its program. This investment is structured as $125,000 for 7% equity on a post-money SAFE (Simple Agreement for Future Equity), alongside an additional $375,000 on an uncapped Most Favored Nation (MFN) SAFE. This standardized approach simplifies the initial funding process, allowing founders to focus on product development and market fit rather than protracted fundraising.

Y Combinator's impact on the global startup ecosystem is profound. As of early 2024, it has funded over 4,000 companies across a diverse range of sectors, including software, hardware, biotech, and consumer goods. The combined valuation of YC alumni companies exceeds $600 billion, featuring household names such as Airbnb, Dropbox, Stripe, Coinbase, Reddit, and DoorDash. Its extensive alumni network and ongoing support resources provide a competitive advantage for its portfolio companies, solidifying its position as a critical launchpad for high-growth ventures.

Investor Profile

Y Combinator has backed more than 5,163 startups, with 740 new investments in the last 12 months alone. The firm has led 1,876 rounds, about 36% of its total and boasts 572 exits across its portfolio.

Investment Focus Highlights

  • Concentrates on Seed, Pre Seed, Series A rounds (top funding stages).
  • Majority of deals are located in United States, India, Canada.
  • Strong thematic focus on Software, Artificial Intelligence (AI), Information Technology.
  • Led 466 rounds in the past year.
  • Typical check size: $500K.

Stage Focus

  • Seed (45%)
  • Pre Seed (36%)
  • Series A (8%)
  • Series Unknown (4%)
  • Series B (3%)
  • Series C (1%)
  • Angel (1%)

Country Focus

  • United States (75%)
  • India (4%)
  • Canada (3%)
  • United Kingdom (3%)
  • Mexico (1%)
  • Singapore (1%)
  • France (1%)
  • Germany (1%)
  • Nigeria (1%)
  • Indonesia (1%)

Industry Focus

  • Software
  • Artificial Intelligence (Ai)
  • Information Technology
  • Fintech
  • Saas
  • Financial Services
  • Health Care
  • E-commerce
  • Internet
  • B2b
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FAQ

Frequently Asked Questions

Learn who this investor regularly partners with—both firms and angels—and explore their latest activity.

Who does Y Combinator frequently co-invest with?

Soma Capital
North America, California, United States, San Francisco
Co-Investments: 278
FundersClub
North America, California, United States, San Francisco
Co-Investments: 249
Liquid 2 Ventures
North America, California, United States, San Francisco
Co-Investments: 271
SV Angel
North America, California, United States, San Francisco
Co-Investments: 250
Pioneer Fund
North America, California, United States, San Francisco
Co-Investments: 367
Andreessen Horowitz
North America, California, United States, Menlo Park
Co-Investments: 102
Initialized Capital
North America, California, United States, San Francisco
Co-Investments: 116
Rebel Fund
North America, California, United States, Calabasas
Co-Investments: 128
Goodwater Capital
North America, California, United States, Burlingame
Co-Investments: 236
Khosla Ventures
North America, California, United States, Menlo Park
Co-Investments: 109

Which angels does Y Combinator often collaborate with?

WG
North America, California, United States, San Francisco
Shared Deals: 44
JM
North America, United States
Shared Deals: 37
EL
North America, Florida, United States, Miami Beach
Shared Deals: 56
LB
North America, California, United States, San Francisco
Shared Deals: 42
PB
North America, California, United States, Mountain View
Shared Deals: 98
AF
North America, California, United States, San Francisco
Shared Deals: 35
AO
North America, California, United States, San Francisco
Shared Deals: 59
BF
North America, California, United States, San Francisco
Shared Deals: 34
KT
North America, California, United States, San Francisco
Shared Deals: 29
IA
North America, California, United States, San Francisco
Shared Deals: 31

What are some of recent deals done by Y Combinator?

Caseflood.ai

San Francisco, California, United States

Legal tech company that qualifies, intakes, closes, and retains clients with AI agents.

Artificial Intelligence (AI)Communications InfrastructureLaw EnforcementLegal Tech
SeedJul 30, 2025
Amount Raised: $3,200,000
OffDeal

New York, New York, United States

AI-native investment bank for buying and selling small businesses

Artificial Intelligence (AI)Information TechnologySoftware
Series AJul 29, 2025
Amount Raised: $12,000,000
Salient

Cambridge, Massachusetts, United States

Salient combines novel ocean and land-surface data with AI and climate expertise to deliver the world’s most accurate S2S weather forecasts.

Software
Series AJul 29, 2025
Amount Raised: $60,000,000
Keye

New York, New York, United States

Keye is a proprietary AI system that accelerates and enhances due diligence for private market investors.

Artificial Intelligence (AI)Enterprise ApplicationsFinanceInformation Technology
SeedJul 29, 2025
Amount Raised: $5,000,000
Salient

San Francisco, California, United States

Salient is an AI-driven loan servicing platform built specifically for consumer finance and auto lending industries.

Artificial Intelligence (AI)AutomotiveFinanceFinancial ServicesInformation TechnologyInternet
Series AJul 28, 2025
Amount Raised: $60,000,000
Julius AI

San Francisco, California, United States

Julius AI is an artificial intelligence platform that develops and analyzes data with computational AI.

AnalyticsArtificial Intelligence (AI)Data VisualizationInformation Technology
SeedJul 28, 2025
Amount Raised: $10,000,000
Courtyard

San Francisco, California, United States

Courtyard is an online marketplace for trading cards & digital packs

BlockchainFinTechMarketplaceNon-Fungible Token (NFT)
Series AJul 24, 2025
Amount Raised: $30,000,000
Lyra

San Francisco, California, United States

AI-Native Zoom For Revenue Teams

Artificial Intelligence (AI)Software
SeedJul 24, 2025
Amount Raised: $6,000,000
Cascade Space

San Francisco, California, United States

Cascade Space offers tools and ground station services for designing and analyzing communication systems in deep space missions.

Satellite Communication
SeedJul 24, 2025
Amount Raised: $5,900,000
Diode Computers

New York, New York, United States

Diode Computers is a AI-based software to automate the manufacturing of electronics faster and cheaper.

ElectronicsMachinery ManufacturingManufacturing
Series AJul 23, 2025
Amount Raised: $11,400,000