Y Combinator is a renowned startup accelerator founded in March 2005 by Paul Graham, Jessica Livingston, Robert Tappan Morris, and Trevor Blackwell. Based in Mountain View, California, it provides seed funding, advice, and connections to early-stage startups.

Twice a year, Y Combinator selects a batch of startups to participate in a three-month program, culminating in a Demo Day where startups pitch to a carefully selected audience of investors. Over the years, Y Combinator has funded and nurtured some of the most successful tech companies, including Dropbox, Airbnb, Stripe, and Reddit, making it a pivotal institution in the tech startup ecosystem.

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The Y Combinator Mafia

The Y Combinator Mafia has founded 139 companies and raised $27 billion.

PS: Are you an Y Combinator Mafia member interested in bringing your community together to invest in innovative ventures (and enjoy potential profits and other perks along the way)? Or perhaps you're part of another dynamic group that could be a fantastic source of startup investments?

😉 Then sign up to our waitlist

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List of all amazing companies covered:

• Initialized Capital
• Reddit
• Applied Intuition
• CRED
• Seven Seven Six
• Lookout
• Patreon
• Guesty
• Mercury
• Parsable
• Shogun
• Endpoint Health
• Mutiny
• Science Exchange
• Proxy
• VedaBio
• Fractal
• Convective Capital
• Rye
• Rocketplace
• Accredible
• Coordinate
• ZOTH
• Autio
• OpenPipe
• PayGarden
• Shelpful
• Blip
• 123 Baby Box
• Fiix
• Elpha

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Initialized Capital

Founder: Alexis Ohanian Sr.

Y Combinator Role: Partner

Capital Raised: $1.4B

Stage: Early Stage Venture, Seed

Initialized Capital is an early-stage VC firm focused on helping software engineers and designers with their first seed checks.

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Reddit

Founder: Alexis Ohanian Sr.

Y Combinator Role: Partner

Capital Raised: $1.3B

Investors: Sequoia Capital

Stage: Series F

Reddit is an online platform that enables users to submit links, create content, and have discussions about the topics of their interest.

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CRED

Founder: Kunal Shah

Y Combinator Role: Part-time Partner

Capital Raised: $801.5M

Investors: Ribbit Capital

Stage: Series F

CRED is a fintech startup that offers rewards for customers who use its platform to pay their credit card bills.

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Seven Seven Six

Founder: Alexis Ohanian Sr.

Y Combinator Role: Partner

Capital Raised: $750M

Stage: Venture Capital

Seven Seven Six is a venture capital firm that primarily seeks to invest in seed rounds.

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Applied Intuition

Founder: Qasar Younis

Y Combinator Role: Chief Operating Officer & Group Partner

Capital Raised: $601.5M

Investors: Lux Capital

Stage: Series E

Applied Intuition provides software infrastructure to safely develop, test, and deploy autonomous vehicles at scale.

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Lookout

Founder: Kevin Patrick Mahaffey

Y Combinator Role: Expert

Capital Raised: $432.3M

Investors: Index Ventures

Stage: Debt Financing

Lookout, Inc. is the endpoint to cloud security company purpose-built for the intersection of enterprise and personal data.

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Patreon

Founder: Sam Yam

Y Combinator Role: YCE

Capital Raised: $413.3M

Investors: Initialized Capital

Stage: Secondary Market

Patreon is an online platform connecting musicians and other artists with their fan base.

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Guesty

Founder: Koby Soto

Y Combinator Role: Applications Reviewer Consultant

Capital Raised: $410.6M

Investors: Y Combinator

Stage: Series F

Guesty’s advanced technology optimizes, automates, and streamlines every aspect of managing a hospitality business, all from one platform.

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Mercury

Founder: Immad Akhund

Y Combinator Role: Part-time Partner

Capital Raised: $152.2M

Investors: CRV

Stage: Secondary Market

Mercury offers FDIC-insured accounts, virtual & physical debit cards, currency exchange, domestic, and international wires.

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Parsable

Founder: Ryan Junee

Y Combinator Role: Part-Time Partner

Capital Raised: $132.9M

Investors: Lightspeed Venture Partners

Stage: Series D

Parsable offers a connected worker platform for industrial workers with modern digital tools to improve productivity, quality, and safety.

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Shogun

Founder: Finbarr Taylor

Y Combinator Role: Software Engineer

Capital Raised: $114.6M

Investors: Accel

Stage: Series C

Lookout, Inc. is the endpoint to cloud security company purpose-built for the intersection of enterprise and personal data.

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Science Exchange

Founder: Elizabeth Iorns

Y Combinator Role: Part-time partner

Capital Raised: $77.5M

Investors: Norwest Venture Partners

Stage: Venture - Series Unknown

Science Exchange, the R&D Services Management company, empowers research organizations to accelerate science and drive innovation success.

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Mutiny

Founder: Jaleh Rezaei

Y Combinator Role: Advisor

Capital Raised: $71.6M

Investors: Sequoia Capital

Stage: Series B

Mutiny helps B2B companies generate pipeline and revenue from their target accounts through AI-powered personalized web experiences.

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Endpoint Health

Founder: Diego Rey

Y Combinator Role: Expert/Part time Partner

Capital Raised: $64M

Investors: Mayfield Fund

Stage: Series A

Endpoint Health is a precision immunology company.

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Proxy

Founder: Denis Mars

Y Combinator Role: Director of Admissions

Capital Raised: $58.8M

Investors: Kleiner Perkins

Stage: Series B

Access More, Share Less. Proxy designs and builds privacy-first, human-led, identity technologies. With Proxy ID, your world is now open.

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VedaBio

Founder: Anurup Ganguli

Y Combinator Role: Founder

Capital Raised: $40M

Investors: OMX Ventures

Stage: Series A

VedaBio innovative platform for near-instant molecular detection.

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Fractal

Founder: Justin Kan

Y Combinator Role: Partner

Capital Raised: $35M

Investors: Polygon Ventures

Stage: Venture - Series Unknown

Fractal is an in-game asset and virtual world marketplace where users may find, purchase, and sell gaming NFTs.

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Convective Capital

Founder: Bill Clerico

Y Combinator Role: Part-time Partner

Capital Raised: $35M

Stage: Venture Capital

Convective Capital is an investment firm.

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Rye

Founder: Justin Kan

Y Combinator Role: Partner

Capital Raised: $14M

Investors: Felicis

Stage: Seed

Rye builds developer tools and APIs to build eCommerce experiences.

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Accredible

Founder: Danny King

Y Combinator Role: Startup School Advisor

Capital Raised: $10.8M

Investors: FJ Labs

Stage: Series B

Accredible provides a digital badge and certificate platform.

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Rocketplace

Founder: Louis Beryl

Y Combinator Role: Part-time Partner

Capital Raised: $9M

Investors: Menlo Ventures

Stage: Seed

Rocketplace is a cryptocurrency trading platform that charges 0% commission to buy and sell crypto.

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PayGarden

Founder: Aaron Iba

Y Combinator Role: Partner

Capital Raised: $7M

Investors: —

Stage: Venture - Series Unknown

PayGarden enables customers to pay anonymously using major brand gift cards.

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OpenPipe

Founder: Kyle Corbitt

Y Combinator Role: Director

Capital Raised: $6.7M

Investors: Y Combinator

Stage: Seed

OpenPipe is an AI platform that enables software developers to build datasets and fine-tune prompts with a more affordable model.

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Coordinate

Founder: Rick Morrison

Y Combinator Role: Part-time Partner

Capital Raised: $5.5M

Investors: Initialized Capital

Stage: Seed

Collaborative project management software for teams delivering services to clients, customers, partners, or separate internal teams.

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Autio

Founder: Woody Sears

Y Combinator Role: Startup School

Capital Raised: $5.4M

Investors: Allied Venture Partners

Stage: Seed

Autio is an app that entertains listeners with bite-sized audio stories about history, landmarks, culture, and natural wonders for travel.

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ZOTH

Founder: Kunal Shah

Y Combinator Role: Part-time Partner

Capital Raised: $5.1M

Investors: Blockchain Founders Fund

Stage: Seed

Bridging Liquidity Across TradFi and Onchain Fi - One RWA at a Time.

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Shelpful

Founder: Sharon (Howell) Pope

Y Combinator Role: Head of Marketing Programs

Capital Raised: $3M

Investors: Apollo Projects

Stage: Seed

Shelpful is the company that combines artificial intelligence with human empathy and accountability.

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123 Baby Box

Founder: Zarina Bahadur

Y Combinator Role: Startup School

Capital Raised: $2.2M

Investors: XRC Ventures

Stage: Pre-Seed

123 Baby Box is an online platform offering mothers brain developmental products for children by personalized subscription box for babies.

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Blip

Founder: Michael Bank

Y Combinator Role: Startup School

Capital Raised: $2.1M

Investors: Foundation Capital

Stage: Seed

Blip is a bill payment platform designed for financial tech companies.

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Fiix

Founder: Arif Bhanji

Y Combinator Role: Alumni - Core Program

Capital Raised: $1.9M

Investors: Y Combinator

Stage: Seed

Fiix sends licensed, expert mechanics to your home or office to repair your car within the same day.

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Elpha

Founder: Cadran Cowansage

Y Combinator Role: Tech Lead

Capital Raised: $1.3M

Investors: Y Combinator

Stage: Seed

Where women in tech talk candidly online.

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