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?

Momentic

San Francisco, California, United States

Momentic is an AI-powered testing software that helps developers automate end-to-end testing of web applications.

Artificial Intelligence (AI)Enterprise SoftwareSaaSSoftwareUsability Testing
Series ANov 24, 2025
Amount Raised: $15,000,000
Maritime Fusion

San Francisco, California, United States

Maritime Fusion specializes in the development and construction of high-temperature superconducting fusion reactors.

EnergyFuelNuclear
SeedNov 24, 2025
Amount Raised: $4,500,000
Model ML

New York, New York, United States

Model ML provides AI tools that automate tedious tasks in finance, enabling firms to process deals and models more efficiently.

Artificial Intelligence (AI)B2BFinancial ServicesFinTechMachine Learning
Series ANov 24, 2025
Amount Raised: $75,000,000
Cerrion

Zürich, Zurich, Switzerland

Cerrion is an AI software company that develops computer vision technology to generate production insights.

Artificial Intelligence (AI)Industrial AutomationInformation TechnologyMachine LearningSoftware
Series ANov 24, 2025
Amount Raised: $18,000,000
Pibit

Palo Alto, California, United States

Enhance Underwriting Decisions with Accurate Loss Run Insights

Artificial Intelligence (AI)Commercial InsuranceInsuranceInsurTechSoftware
Series ANov 20, 2025
Amount Raised: $7,000,000
SynthioLabs

San Francisco, California, United States

SynthioLabs is a Software Development firm offering AI based automation tools for optimized pharmaceutical operations.

Artificial Intelligence (AI)Business Process Automation (BPA)PharmaceuticalSoftware
SeedNov 19, 2025
Amount Raised: $5,000,000
Automat AI

San Francisco, California, United States

Automat offers robotic process automation for Chrome using GPT4 and computer vision.

Artificial Intelligence (AI)Developer ToolsRobotic Process Automation (RPA)
Series ANov 19, 2025
Amount Raised: $15,500,000
Ember Copilot

San Francisco, California, United States

Ember Copilot is a Software Development firm offering a tool to reduces medical claim denials.

Information TechnologyMedicalSoftware
SeedNov 19, 2025
Amount Raised: $4,300,000
Quindar

Washington, District of Columbia, United States

Quindar offers a one-stop shop in the cloud for spacecraft analysis and operations.

Cloud InfrastructureSaaSSatellite Communication
Series ANov 19, 2025
Amount Raised: $18,000,000
Jiga

Tel Aviv, Tel Aviv, Israel

Source parts. Fast, hassle-free, and cost-efficient.

B2BManufacturingProcurementSoftwareSupply Chain Management
Series ANov 18, 2025
Amount Raised: $12,100,000