AirBnB leads the list of Most Successful Y Combinator Alumni Startups

Y Combinator is responsible for many successes in the startup world. Based in Mountain View, California, YC funds and mentors a good number of startups per year in its 12-week program that culminates in a demo day where founders pitch their companies to an audience of top investors from Silicon Valley.

As part of efforts to help people to get to know some of the fastest growing Alumni in the YC community, the accelerator released a list of top 100 Y Combinator companies by valuation as of October, 2018. AirBnB from the winter 2009 cohort leads the list with over 4000 jobs created while Brex, a credit card provider who announced a $125 million raise at a $1.1 billion valuation is the youngest to make the top 20 startups on the list.

With the accelerator announcing that it will increase the size of its investments to the $150,000 for 7% equity starting from the winter 2019 batch, here at the top 20 most successful Y Combinator companies since it began backing companies in 2005:


  • Airbnb: An online travel community and room-sharing platform founded by Brian Chesky, Joe Gebbia and Nathan Blecharczyk. They offer end-to-end trips, including where you stay, what you do and the people you meet. Valuation: $30 billion.YC W2009.


  • Stripe: A provider of an online payment processing system for internet businesses founded by John and Patrick Collison. Stripe builds economic infrastructure for the internet. Businesses of every size—from new startups to public companies—use their software to accept payments and manage their businesses online. They recently led an investment round in Paystack. Valuation: $20 billion.YC S2009.


  • Cruise: Acquired by GM in 2006, the company is building autonomous vehicles. It was founded by Kyle Vogt and Daniel Kan. Valuation: $14 billion.YC W2014.


  • Dropbox: A file hosting service and workplace collaboration platform founded by Drew Houston and Arash Ferdowsi that went publicin March. Market cap: >$10 billion. YC S2007.


  • Coinbase: A digital cryptocurrency exchange and wallet platform founded by Brian Armstrong and Fred Ehrsam where merchants and consumers can transact with new digital currencies like bitcoin, ethereum and lifecoin. Valuation ~$8 billion. YC S2012.


  • Instacart: A grocery and home essentials delivery service founded by Apoorva Mehta, Max Mullen and Brandon Leonardo. Valuation: $7 billion. YC S2012.


  • Machine Zone: A mobile games company, founded by Mike Sherrill, Gabriel Leydon and Halbert Nakagawa, known for “Game of War”.  They build massive mobile games that break down linguistic and geographic barriers by uniting an unprecedented number of global players in one gaming world. Valuation: >$5 billion. YC W2008.


  • DoorDash: An app-based food delivery service founded by Tony Xu, Stanley Tang and Andy Fang. DoorDash connects customers with their favorite local and national businesses in more than 850 cities across the United States and Canada. Valuation:$4 billion. YC S2013.


  • Zenefits: The provider of human resources software for small and medium-sized businesses founded by Laks Srini and Parker Conrad. Valuation: $2 billion.YC W2013.


  • Gusto: The provider of software that automates and simplifies payroll for businesses, founded by Josh Reeves, Tomer London and Edward Kim. Valuation: $2 billion.YC W2012.


  • Reddit: An online platform for conversation and thousands of communities founded by Alexis Ohanian and Steve Huffman. Acquired by Conde Nast in 2006 Valuation: $1.8 billion. YC S2005.


  • PagerDuty: A digital ops management platform for businesses founded by Baskar Puvanathasan, Andrew Miklas and Alex Solomon. They empower DevOps, IT operations, support, security, and business leaders to turn any signal into insight and real-time action across any operational use case. Valuation: $1.3 billion.YC S2012.


  • Docker: A platform for applications that gives developers the freedom to build, manage and secure business-critical applications, founded by Solomon Hykes and Sebastien Pahl. Valuation: $1.3 billion. YC S2010.


  • Ginkgo Bioworks: A biotech company focused on designing custom microbes founded by Reshma Shetty, Jason Kelly, Barry Canton and others. Valuation: >$1 billion.YC S2014.


  • Rappi: A Latin American on-demand delivery startup founded by Felipe Villamarin, Simon Borrero and Sebastian Mejia. Valuation: >$1 billion. YC W2016.


  • Brex: A B2B financial startup that provides corporate cards to startups. Its founders include Henrique Dubugras and Pedro Franceschi. Valuation: $1.1 billion.YC W2017.


  • GitLab: A developer service founded by Sid Sijbrandij and Dmitriy Zaporozhets that aims to offer a full lifecycle DevOps platform. Valuation: $1.1 billion. YC W2015.


  • Twitch: An Amazon-acquiredlive-streaming platform for video games used by millions. Its founders include Emmett Shear, Justin Kan, Michael Seibel and Kyle Vogt. YC W2007.


  • Flexport: A logistics company that moves freight globally by air, ocean, rail and truck founded by Ryan Petersen. Valuation: ~$1 billion. YC W2014.


  • Mixpanel: A user analytics platform that helps each person at a business understand its users, founded by Suhail Doshi and Tim Trefren. Valuation: >$865 million.YC S2009.