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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?

Variance

San Francisco, California, United States

Variance is a software company that builds AI agents for compliance and risk.

Developer APIsInformation TechnologySoftware
Series AMar 31, 2026
Amount Raised: $21,500,000
Nexus

Wilmington, Delaware, United States

Nexus build production-ready AI agents without code for non-technical teams in large organizations.

Artificial Intelligence (AI)Enterprise SoftwareSoftware Engineering
SeedMar 31, 2026
Amount Raised: $4,300,000
Asendia AI

Wilmington, Delaware, United States

Asendia AI is the n1 Agentic recruiting platform

Artificial Intelligence (AI)Human Resources
Pre SeedMar 31, 2026
Amount Raised: $500,000
General Astronautics

San Francisco, California, United States

General Astronautics builds autonomous robotic systems that perform research and manufacturing tasks in microgravity environments.

Artificial Intelligence (AI)HardwareInformation TechnologyRobotic Process Automation (RPA)RoboticsSoftware
Pre SeedMar 31, 2026
Starcloud

Redmond, Washington, United States

Starcloud develops space-based data center infrastructure designed to support computing and data processing beyond Earth environments.

AerospaceData CenterManufacturingSpace Travel
Series AMar 30, 2026
Amount Raised: $170,000,000
Keyframe Labs

Santa Monica, California, United States

Keyframe's interactive video models turn agents into lifelike video calls.

Agentic AIDeveloper APIsDeveloper PlatformDeveloper ToolsGenerative AISaaS
Pre SeedMar 30, 2026
Amount Raised: $500,000
ProjectX

San Francisco, California, United States

ProjectX provides cloud-based software solutions that support digital transformation and data management for enterprises.

Cloud ComputingOperating SystemsPaaS
Pre SeedMar 30, 2026
Amount Raised: $500,000
Constellation Space

Seattle, Washington, United States

Constellation Space develops software that predicts satellite link failures and automates network routing using AI and real-time telemetry.

AerospaceAnalyticsArtificial Intelligence (AI)Information TechnologyPredictive AnalyticsReal TimeSatellite CommunicationSoftwareSpace Travel
SeedMar 28, 2026
Amount Raised: $6,500,000
Lexius

Berkeley, California, United States

Lexius develops software that uses camera feeds to identify potential shoplifting and notify staff in real time.

Artificial Intelligence (AI)Retail TechnologySecuritySoftware
Pre SeedMar 26, 2026
Amount Raised: $500,000
Sonarly

San Francisco, California, United States

Sonarly is a debugging platform that tracks every user session, detects bugs, and packages the context for an AI coding agent.

Artificial Intelligence (AI)Developer PlatformDeveloper ToolsInformation Technology
Pre SeedMar 26, 2026
Amount Raised: $500,000

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