People | Y Combinator

Garry Tan is President and CEO of Y Combinator. He was a partner at Y Combinator from 2011 to 2015, where he built key parts of the YC experience for founders including Bookface and the Demo Day website. Garry is the co-founder of Initialized Capital and Posterous (YC S08), a blog platform acquired by Twitter, and prior to that, he was an early designer and engineering manager at Palantir (NYSE:PLTR), where he designed the company logo. Garry holds a BS in Computer Systems Engineering from Stanford.

Gustaf Alströmer is a General Partner at YC. He spent 4.5 years at Airbnb where he worked as a Product Lead on the Growth team, a team he helped start in 2012. Prior to Airbnb, Gustaf was Head of Growth at Voxer, and before that, he was CEO & co-founder of Heysan, which was part of the YC W07 batch.

Tom Blomfield is a General Partner at YC. He was co-founder of Monzo, one of the first app-based challenger banks in the UK. Monzo raised more than £500m, counts 10% of the UK population as customers, and was the #1 recommended brand in the UK for two years running. Previously, he founded GoCardless (YC S11), an online payments processor for the Direct Debit system. In 2019, he was awarded an OBE for increasing competition in the banking sector.

Tyler Bosmeny is a General Partner at YC. He was the co-founder and CEO of Clever (S12), which lets students and teachers access all of their learning software in one place. 60% of students in the US log into Clever regularly. In 2021, Clever was acquired for $500M. Tyler graduated from Harvard and has a BA in Applied Math and an MA in Statistics.

Nicolas Dessaigne is a General Partner at YC. He was the co-founder of Algolia (YC W14), a growth stage Search API used by millions of developers. He led the company as CEO up to 350 people before hiring a successor in 2020. He is still very involved in the success of Algolia as Board Director. He has a PhD in Computer Science from the University of Nantes.

Aaron Epstein is a General Partner at YC. He was co-founder of Creative Market (YC W10), a marketplace for graphic design assets, which he sold to Autodesk in 2014 and spun out as an independent startup again in 2017. Aaron founded the company to make beautiful design simple and accessible to everyone, and has since helped generate more than $100M in sales for independent creators around the world. He has a BS in Business from the University of Maryland.

Brad Flora is a General Partner at YC. He was co-founder and CEO of Perfect Audience, an ad network funded by Y Combinator in 2011, acquired by Marin Software in 2014 and used by companies like Eventbrite, Atlassian, and New Relic to market to more than a billion people. He is an active angel investor, occasional contributor for Slate.com and lives in San Francisco with his wife and three children. He has a BA from Princeton University in English and an MS in Journalism from Northwestern.

Jared Friedman is a Managing Partner at YC. He was cofounder of Scribd, which was funded by Y Combinator in 2006 and grew to be one of the top 100 sites on the web. Jared previously worked at a pioneering AI company and studied computer science at Harvard.

Ankit Gupta is a General Partner at Y Combinator. He was the co-founder of Reverie Labs, which developed machine learning models for drug discovery, and ultimately advanced its own medicines to the clinic. Reverie was acquired by Ginkgo Bioworks in 2024. Prior to Reverie, Ankit was a deep learning researcher and has published at conferences like ICML. He has a BA and MS in Computer Science from Harvard.

Diana Hu is a General Partner at YC. She was co-founder and CTO of Escher Reality (YC S17), an Augmented Reality Backend company that was acquired by Niantic (makers of Pokémon Go). At Niantic, she was the head of the AR platform. Previously, she led data science at OnCue TV that was sold to Verizon. Originally from Chile, Diana graduated from Carnegie Mellon University with a BS and MS in Electrical and Computer Engineering with a focus in computer vision and machine learning.

Pete Koomen is a General Partner at YC. He co-founded Optimizely (W10) which helps companies run experiments on their websites and apps. He helped Optimizely grow from inception, to $100M+ in ARR to, ultimately, its acquisition in 2020. Pete holds a Master's degree in Computer Science from the University of Illinois at Urbana Champaign.

David Lieb is a General Partner at YC. He was previously the co-founder and CEO of Bump (S09), a mobile app used by more than 150M people to share photos and contact info by bumping their phones together. Bump was acquired by Google in 2013, and an unreleased photo-sharing app they were building became the foundation of Google Photos. Before Bump, Dave was a researcher in the Stanford AI Lab and a software engineer at Texas Instruments. He holds EE/CS degrees from Princeton and Stanford and finished half an MBA at Chicago Booth before dropping out to start Bump.

Andrew Miklas co-founded PagerDuty (YC S10, NYSE:PD), which became the backbone of digital operations for thousands of businesses. As founding CTO, he designed the original product and its high-availability architecture, and scaled the engineering team to 70+ people. After PagerDuty, he became an early-stage investor at s28 Capital, supporting companies like Clerk, CaptivateIQ, and Teleport. Andrew brings deep experience in building resilient systems and scaling engineering teams from zero to impact.

Michael Seibel is a Partner Emeritus at YC. He was the cofounder and CEO of Justin.tv and Socialcam. Socialcam sold to Autodesk in 2012 and under the leadership of Emmett Shear, Justin.tv became Twitch.tv and sold to Amazon in 2014. Before getting into startups, he spent a year as the finance director for a US Senate campaign and in 2005, Michael graduated from Yale University with a BA in political science.

Harj Taggar is a Managing Partner at YC. He was previously founder and CEO of Triplebyte (YC S15) and Auctomatic (YC W07), which was acquired by Live Current Media in 2008. He first joined YC as a partner in 2010, leaving in 2014 to start Triplebyte and rejoining in 2020. He graduated in 2006 from Oxford, where he studied Jurisprudence.

Jon Xu is the co-founder and former CTO of FutureAdvisor (YC S10), one of the first robo-advisors to make quality investment management accessible to a broader consumer audience. After the company was acquired by BlackRock in 2015, Jon continued to lead product and engineering, building an enterprise-grade robo-advisor platform for large financial institutions. His background gives him unique expertise both in building high-trust consumer products and B2B platforms for regulated industries. Jon holds a degree in Computer Science from MIT.