Y Combinator

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.

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 Capital

Financial Services

Company Size

1,001-5,000

Company Stage

Pre-seed

Total Funding

$45.3B

Headquarters

Mountain View, California

Founded

2005

People at Y Combinator

People at Y Combinator who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • YC's Summer 2026 batch prioritizes AI niches like low-pesticide agriculture and personalized medicine.
  • YC now accepts solo founders, expanding access with 10% of Summer 2026 batch being one-person startups.
  • YC's Fall 2026 deadline is July 27, offering startups near-term access to $500,000 funding for 7% equity.

What critics are saying

  • YC pivoting to fund 15 AI-native infrastructure startups will dilute resources for non-AI ventures within 6–12 months.
  • Massive saturation of identical AI assistants from YC Requests will trigger price wars, collapsing margins in 12–18 months.
  • YC's focus on AI-native service companies will cannibalize talent for traditional biotech and fintech cohorts within 9–15 months.

What makes Y Combinator unique

  • YC operates a batch-based system four times a year, creating strong network effects among founders.
  • YC provides money and mentoring for equity, with a signalling effect that boosts founder credibility.
  • YC offers a 3-month program culminating in Demo Day, enabling rapid investor access for startups.

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Funding

Total Funding

$45.3B

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

Health Tech World
Jun 22nd, 2026
Prosper AI raises $30M from Andreessen Horowitz to scale healthcare AI platform

Prosper AI has raised $30 million in a Series A round led by Andreessen Horowitz, with participation from Base10 and existing investors Emergence Capital, Y Combinator and Company Ventures. The funding will be used to expand Prosper AI's engineering and customer-facing teams, deepen integrations across major electronic health record platforms, and accelerate adoption of its AI platform.

Nepali Times
Jun 21st, 2026
Nepali AI startup Lamina Labs secures $3M for video explainer tool Simi

Two Nepali MIT students, Sudip Rokaya and Kartikesh Mishra, have founded Lamina Labs in San Francisco, developing an AI-powered video explainer tool called Simi. The startup has secured $500,000 from YCombinator and an additional $3 million in funding. Simi generates whiteboard-style educational videos from text prompts in 80 languages, including Nepali, offering multiple aspect ratios and voice options. The platform is faster and cheaper than competitors whilst producing higher-quality videos. Twelve days after launch, Simi had 4,000 users and 187 paying customers, including small businesses and pet daycares. Lamina Labs is the first all-Nepali startup funded by YCombinator, which has an acceptance rate below 1%. The founders plan to use the funding to hire additional engineers and scale the platform.

Techstars
Jun 18th, 2026
Techstars | The world’s most active pre-seed investor

Raise startup funding and gain critical insight to help launch your business through the startup accelerator and development program at Techstars.

Ralo
Jun 18th, 2026
We raised $2.9M to make mortgages actually affordable

Ralo raised a $2.9M seed round from Y Combinator, Manresa Ventures, Pack Ventures, and angels to build the first AI-native mortgage broker and make home loans more affordable.

Founderland
Jun 17th, 2026
Circle Medical Founders Launch Clara AI Primary Care with $12M

George Favvas and team debut physician-supervised AI doctor platform with national coverage, tiered pricing, and ambitious healthspan mission after...

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