yc-w21
(9)
Weston Lim
Weston Coleman Lim is the co-founder and technical lead of Dashlabs.ai, a Manila-based software company that automates the paperwork and instrument wiring of diagnostic laboratories and clinics. He started building during the early pandemic - first an annotated map of neighborhood checkpoints, then the official national dashboard, then form-digitization work for the Philippine Red Cross - before the same team turned that scramble into a lab-software business and landed in Y Combinator's Winter 2021 batch. Today Dashlabs.ai runs across more than 200 clinics in the Philippines.
Yoav Zimmerman
Yoav Zimmerman is a San Francisco founder and machine learning engineer who is CEO and co-founder of Third Chair (YC X25), an AI-native IP enforcement agent that helps rightsholders find, stop, and monetize unauthorized use of their content. A Forbes 30 Under 30 honoree, he previously co-founded the social video analytics startup Trendpop (YC W21), grew it past $1M ARR with clients like Universal Music Group and MrBeast, and exited to Collab. Before startups he worked on machine learning at Google and at Determined AI.
Stella Han
Stella Han is the co-founder and CEO of Fractional, a San Francisco startup that lets friends and strangers pool money to co-own investment real estate for as little as a few thousand dollars. A Carnegie Mellon computer science graduate and former senior software engineer at Affirm, she left fintech to attack a problem she grew up around: real estate is a great way to build wealth, and almost impossibly clunky to buy with other people. Fractional went through Y Combinator's Winter 2021 batch, raised a $5.5M seed led by CRV with backing from Will Smith and Kevin Durant, and a $15M Series A led by Fifth Wall in late 2024.
Chris Compean
Chris Compean is the co-founder and CEO of Mayan, a fully-remote SaaS platform that helps Amazon sellers grow with data-driven automation for advertising, inventory, and analytics. An MIT graduate and former early team member at Thrasio, he launched Mayan in 2020 with three MIT fraternity brothers, went through Y Combinator's Winter 2021 batch, and raised a $5M Series A in 2023 led by Bright Pixel. Mayan has driven over $160M in total Amazon sales for its customers.
Anin Sayana
Anin Sayana is the co-founder and CEO of Quadrant Health, a Y Combinator-backed startup building clinical AI that reads electronic health records and patient messages in real time to flag patient harm before it happens. A Stanford computer science graduate, he first made headlines at 13 as a finalist in the 3M Young Scientist Challenge for a carbon-nanotube system aimed at chemo-resistant cancer stem cells. Today his company partners with health systems like Stanford Health Care and software vendors like medent, and claims an AI that scored 93.23% on the US Medical Licensing Exam.
Nick Gulino
Nick Gulino is the founder and CEO of Recover (letsrecover.com), a Y Combinator-backed telehealth company that delivers evidence-based addiction treatment in partnership with state and local governments, at roughly a tenth of the cost of traditional rehab. A graduate of Yale Law School and UC Berkeley who started at a community college and a 'last chance' high school, he spent a decade in government and addiction services - leading work in McKinsey's government practice, advising governors, and serving in the White House - before building Recover to make recovery accessible to low-income and underserved people.
Lydia Han
Lydia Han is the co-founder and CEO of ModernLoop, a recruiting operations platform she started in December 2020 to fix the chaos of coordinating hundreds of interviews. A product manager by training, she built Slack's calendar and Zoom integrations and set up Brex's interview process before founding the company through Y Combinator's W21 batch. ModernLoop has raised roughly $12.4M, including a $9M Series A led by Accel with the CEOs of Slack and Zoom writing checks, and powers hiring for companies like Ramp, Benchling, Chainalysis, and VSCO.
Alex Greaves
Alex Greaves is the Co-Founder and CTO of FlutterFlow, a visual low-code/AI-powered app development platform he co-founded in 2020 alongside fellow ex-Googler Abel Mengistu. Built on Google's Flutter framework, FlutterFlow has grown to serve over 2 million users across 200+ countries, backed by $25.5M in Series A funding led by GV and Gradient Ventures at a ~$170M valuation. A Stanford physics and CS grad who honed his craft on Google Maps' machine learning team, Greaves now leads a platform that lets developers and non-developers alike ship native iOS, Android, and web apps in a fraction of traditional development time.
Jonathan Grandperrin
Jonathan Grandperrin is the co-founder and CEO of Mindee, a Y Combinator-backed (W21) API-first platform that automates document understanding using computer vision and machine learning. A graduate of École Polytechnique and UC Berkeley, he previously served as CTO at ECTOR and TankYou before founding Mindee in 2018. Under his leadership, Mindee has raised over $23M, participated in Y Combinator's Winter 2021 batch, grown to $3.5M ARR with 200-250% net dollar retention, and become a leading developer tool for intelligent document processing serving accounting, finance, and enterprise software companies worldwide.