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Weilos

acquired by Weight WatchersYC S13

San Francisco, US · 11 employees · 7 known investors

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Weilos (operating as WeightWatchers/WW Clinic) provides virtual weight management services combining the Points program, nutritional guidance, and access to GLP-1 medications through board-certified clinicians. The platform serves consumers seeking structured weight loss support with coaching and community.

Digital HealthHealthtechWellness & FitnessFitnessHealth & WellnessUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S13)

RWRay Wu
Ray WuFounderRay Wu founded Weilos, a digital health company focused on weight management services, which was acquired by Weight Watchers. He is currently working on Keyto, a ketogenic diet program for weight loss and health improvement.
TW
Tim Wu

Investors · 7

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · funding news · open dataset · 5k.vc investor directory · Not right? Tell us

Andreessen HorowitzreportedMenlo Park · $500K – $50M

How we know: Y Combinator's founder network · Not right? Tell us

General CatalystreportedSan Francisco · $30M

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Khosla VenturesreportedMenlo Park · $100K – $20M

How we know: funding news · Y Combinator's founder network · Not right? Tell us

Maverick VenturesreportedSan Francisco · $3M – $10M

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Start Capitalreported

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Related companies · 5

BellabeatBellabeat develops AI-powered wearable devices and a health intelligence platform designed to help women track wellness metrics, understand hormonal cycles, and receive personalized health insights. The company targets women seeking preventive care and longevity optimization through cycle-based data analysis and biometric monitoring.
AdaptedAdapted is a prehab and mobility app that delivers personalized exercise programs to athletes based on their sport, injury history, and training goals. The app provides evidence-based preventive exercises to strengthen vulnerable areas and reduce injury risk across various sports.
BlokBlok provides a platform where fitness instructors can offer live classes, sell recorded content, monetize specialized services, manage brand partnerships, and build their own branded communities.
ArketaArketa is a management platform for fitness and wellness businesses, offering scheduling, booking, payments, memberships, reporting, and marketing tools across single or multi-location studios. It targets studio owners and operators, from those opening a first location to chains running many, and includes onboarding and migration support.
Eat BlueprintEat Blueprint prepares meals based on longevity-focused nutritional protocols, using organic and locally-sourced ingredients while excluding gluten and seed oils.

Companies working in the same space as Weilos.

Legal entities · 1

corporate structure
Weilos, Inc.

In the news

Weilos, The YC-Backed Weight Loss Startup, Has Been Acquired By Weight Watchers | TechCrunchtechcrunch.com · Apr 2015YC-Backed Weight-Loss Startup Weilos Moves From Fitness Coaching To Weight-Loss Selfies | TechCrunchtechcrunch.com · Jan 2014

Frequently asked questions

What does Weilos do?
Weilos (operating as WeightWatchers/WW Clinic) provides virtual weight management services combining the Points program, nutritional guidance, and access to GLP-1 medications through board-certified clinicians. The platform serves consumers seeking structured weight loss support with coaching and community.
Who founded Weilos?
Weilos was founded by Ray Wu.
Who are Weilos's investors?
Weilos's investors include Launchpad LA, Y Combinator, Andreessen Horowitz, General Catalyst, Khosla Ventures, Maverick Ventures, Start Capital.
Who acquired Weilos?
Weilos was acquired by Weight Watchers.
Where is Weilos headquartered?
Weilos is headquartered in San Francisco, US.