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Y Combinator

Seed-stage startup accelerator and investor

Overview

Y Combinator is a startup accelerator that funds early-stage companies through seed investments and a three-month, batch-based program. Founders receive mentorship, guidance on product and business strategy, and a Demo Day to present to invited investors. The program runs four times a year, creating a strong network effect among participants who can support one another and share experiences. The accelerator’s portfolio spans software, fintech, biotech, and consumer products, with notable alumni including Stripe, Airbnb, and Coinbase. Unlike many investors, Y Combinator combines a small equity stake with access to a vast alumni and investor network, monetizing returns from successful exits such as acquisitions or IPOs. Its goal is to identify high-potential ventures, help them grow, and generate meaningful financial returns for its stakeholders through exits.

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About Y Combinator

Simplify's Rating
Why Y Combinator is rated
B+
Rated A on Competitive Edge
Rated B on Growth Potential
Rated B on Differentiation

Industries

Venture CapitalFinancial Services

Company Size

1,001-5,000

Company Stage

Pre-seed

Total Funding

$50.1B

Headquarters

San Francisco, California

Founded

2005

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Simplify's Take

What believers are saying

  • Startup School 2026 drew over 6,000 builders to Chase Center in July.
  • YC restored Canada as an accepted incorporation country on February 5, 2026.
  • The YC AI Stack offered over $25,000 in credits to attract AI founders.

What critics are saying

  • Delve parted ways with YC on April 4, 2026 after compliance allegations.
  • Parker filed Chapter 7 on May 7, 2026 after a collapsed $90 million sale.
  • Repeated startup blowups push founders toward direct AI capital, weakening YC’s core moat.

What makes Y Combinator unique

  • June 2026 added Diana Hu, Christopher Golda, Grey Baker, and Harshita Arora.
  • YC’s 2026 Demo Days and Startup School 2026 still command founder-investor attention.
  • Launch YC and the Startup Directory make YC’s sourcing and discovery durable.

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Funding

Total Funding

$50.1B

Above

Industry Average

Funded Over

0 Rounds

Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

Health Savings Account/Flexible Spending Account

Unlimited Paid Time Off

Paid Holidays

401(k) Retirement Plan

401(k) Company Match

Parental Leave

Fertility Treatment Support

Commuter Benefits

Company News

Fortune
Oct 9th, 2026
Ultra raises $62 million for fast-growing ‘robots as a service’ business, announces tie-up with AI research firm Physical Intelligence | Fortune

The raise consisted of a Series A seed round led by Framework Ventures plus an earlier seed round.

The SaaS News
Oct 8th, 2026
Egoist Machines raises $3M to scale AI Passport for portable data control across ChatGPT, Claude, Gemini

San Francisco-based Egoist Machines has raised $3 million in seed funding to scale its AI Passport platform. The permission-based system allows users to manage and share personal data across AI assistants including ChatGPT, Claude, and Gemini whilst maintaining ownership of their information. The round was backed by Y Combinator, Goodwater Capital, a European family office, and scientists from DeepMind and Meta. Founded by Erin McGurk and Dr David Khachaturov, Egoist Machines aims to give users control over their personal data in AI applications. The AI Passport functions as a context and identity layer, enabling users to port their personal information across different AI platforms rather than having it siloed within individual applications. The funding will support the company's platform expansion and growth of its connected applications ecosystem.

Fierce Healthcare
Oct 6th, 2026
Vitalize secures $31M to scale AI-powered operating system for hospital staffing and scheduling

Hospital staffing and scheduling is unglamorous, complex and tedious work, and Veeraj Shah, co-founder and CEO of startup Vitalize, believes it's the most valuable healthcare task to tackle. | Vitalize positions its software as an "air traffic control" system for healthcare operations, helping health systems automate staffing, forecast demand, manage capacity and reduce reliance on overtime and agency labor.

StartupTicker
Oct 6th, 2026
Y-Combinator backs Swiss startup Ageospatial's AI-powered satellite risk assessment for insurers

Y Combinator has selected Swiss startup Ageospatial for its autumn 2026 cohort. The Vaud-based company, founded by Maaz Cheikh, uses satellite imagery and artificial intelligence to help insurers remotely assess risks for properties, land, and infrastructure. The platform addresses a major industry gap: 97% of commercial properties are never inspected, forcing insurers to rely on owner-provided information that is incorrect in nearly half of cases. Ageospatial's AI analyses satellite imagery, maps, public records, and insurer data to identify assets, surrounding hazards, and changes over time. The three-month programme in San Francisco will focus on customer acquisition, particularly with US commercial property insurers. Ageospatial will maintain its European base at EPFL Innovation Park in Lausanne whilst expanding in America.

TechCrunch
Oct 6th, 2026
Flai raises $27M Series A as AI dealership software books 50K appointments monthly

Flai, an AI-powered customer relationship management software for car dealerships, has raised $27 million in Series A funding led by Base10 Partners. The round included investments from Friedkin Group, Findlay Automotive, Toyota's venture arm, Y Combinator, and First Round Capital. The startup now works with more than 10 of the top 50 dealer groups in the US. Its AI handles customer interactions, outbound campaigns, and scheduling across sales and service, booking 50,000 appointments monthly. This growth has driven a 20-fold revenue increase over the past year. Flai's software can be implemented in dealerships within 10 days of contract signing. The company has expanded from three employees to around 40. Half of its revenue now comes from new customers, largely through peer referrals amongst dealers. CEO Ari Polakof said the startup differentiates itself through deep integration tailored to each dealer's specific needs, going beyond basic phone answering to comprehensive customer management.

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