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?

Legora

Stockholm, Stockholms Lan, Sweden

Legora is a collaborative AI that empowers lawyers by enabling them to review documents, conduct research, and draft legal materials.

Artificial Intelligence (AI)LegalLegal TechSoftware
Series COct 30, 2025
Amount Raised: $150,000,000
The Prompting Company

San Francisco, California, United States

The Prompting Company analyzes and creates AI-optimized content for products to gain visibility in AI-generated answers.

Artificial Intelligence (AI)B2BSaaSSoftware
SeedOct 30, 2025
Amount Raised: $6,500,000
Wild Moose

San Francisco, California, United States

Wild Moose provides conversational AI to help on-call developers tame production.

Artificial Intelligence (AI)DevOpsInformation TechnologySoftwareWeb Development
SeedOct 28, 2025
Amount Raised: $7,000,000
Mem0

San Francisco, California, United States

Mem0 is a SaaS company that specializes memory layers for LLM applications.

Artificial Intelligence (AI)Information TechnologyMachine LearningSaaS
Series AOct 28, 2025
Amount Raised: $20,000,000
Whatnot

San Francisco, California, United States

Whatnot is a livestream shopping platform for buying and selling products.

CollectiblesE-CommerceInformation TechnologyMarketplaceTrading Platform
Series FOct 28, 2025
Amount Raised: $225,000,000
Vesence

San Francisco, California, United States

Agentic AI for Law Firms

SeedOct 28, 2025
Amount Raised: $9,000,000
SalesPatriot

San Francisco, California, United States

SalesPatriot serves as an advanced back-office operating system tailored for companies within the defense sector.

GovernmentOperating SystemsSaaS
SeedOct 26, 2025
Amount Raised: $5,000,000
Crustdata

San Francisco, California, United States

Crustdata builds a robust and easy-to-use set of APIs that solves the problem of getting accurate, fresh data on companies and people.

Software
SeedOct 22, 2025
Amount Raised: $6,000,000
Newton AI

San Francisco, California, United States

Newton AI is an AI-powered dental workflow automation platform that helps practices modernize patient engagement, reduce front desk burden.

Artificial Intelligence (AI)Data Center AutomationDentalHealth CareHospital
SeedOct 22, 2025
Amount Raised: $3,800,000
Tempo

Toronto, Ontario, Canada

Tempo Labs specializes in the fields of UX, development, and consulting.

Artificial Intelligence (AI)B2BWeb Development
SeedOct 22, 2025
Amount Raised: $5,000,000