Directory
Y Combinator

Y Combinator

Verified: Jun 2026 (Profile Confirmed)👑 Lead Investor
San Francisco, CA
𝕏in
Check Size Range

Flexible Check Size

Preferred Stages
pre-seedseed

Background & Investment Thesis

World's most prestigious startup accelerator. Backed Airbnb, Stripe, Dropbox, Coinbase, Reddit.

Focus Industries

saasaifintechconsumermarketplacedeveloper-toolsbiotechdeep-tech

Notable Portfolio & Backed Deals

AI Outreach Insight94% Match Score

Active investor in saas, ai, fintech, consumer, marketplace, developer-tools, biotech, deep-tech. Highly responsive to concise pitches with clear traction metrics.

Unlock Verified Direct Email & Founder Pitch Tools

Get instant access to Y Combinator's verified mailbox, personalized AI pitch drafts, and 7,400+ active angel profiles.

Verified Deal Signals Active

Key Deal Terms & Quick Facts

Audited venture due diligence summary for Y Combinator

Verified Deal Signals
Typical Check Size

$500k – $5M

Direct angel check per syndicate / round
Target Stages
pre-seedseed
Early-stage entry valuation priority
Founder Pitch Contact

Verified (Protected — Unlock)

Direct mailbox protected against spam
Focus Industries & Categories
saasaifintechconsumermarketplacedeveloper-toolsbiotechdeep-tech
Notable Backed Deals & StartupsInternal company dossiers
AirbnbStripeDropboxCoinbaseRedditTwitchDoorDashGusto

Frequently Asked Questions about Y Combinator

What is Y Combinator's typical angel check size?▼

Y Combinator's investment check size typically ranges around $500k – $5M, participating in early-stage financing rounds alongside leading venture capital funds and angel syndicates.

What stages and sectors does Y Combinator invest in?▼

Y Combinator primarily backs early-stage startups across pre-seed, seed stages, focusing on saas, ai, fintech, consumer, marketplace, developer-tools, biotech, deep-tech.

What companies are in Y Combinator's angel portfolio?▼

Y Combinator has backed notable companies including Airbnb, Stripe, Dropbox, Coinbase, Reddit, Twitch, DoorDash, Gusto.

How can startup founders contact or pitch Y Combinator?▼

Founders can access verified direct email contact channels, AI-assisted pitch drafting, and syndicate warm intro paths for Y Combinator through OpenAngels.