Gainful

Gainful is a personalized performance nutrition company that sells protein powders, pre-workout formulas, hydration mixes, greens and performance boosts (collagen, creatine, fiber) directly to consumers. Customers complete an online personalization quiz covering physiology, dietary restrictions and goals, and are matched to one of seven protein blends; subscriptions also include one-on-one support from in-house registered dietitians. The company positions its products as free from artificial sweeteners, flavorings and colors, and organizes its catalog both by product type (protein, pre-workout, hydration, greens, accessories, flavor boosts) and by goal (build muscle, get lean, cognition, longevity).

A distinguishing element of the product line is the separation of unflavored protein powder from individually packaged flavor packets, of which eight are offered, allowing customers to vary flavor day to day rather than commit to a single flavored tub; the flavor packets are also marketed for use in yogurt, oatmeal, smoothies, baked goods and coffee. Protein blends include Collagen Whey, Everyday Plant, Everyday Whey, Isolate-Only Whey, Lean Plant, Lean Whey and Performance Whey, with per-serving protein ranging from 20g to 25g. Products are listed at prices in the roughly $21 to $38 range, and subscriptions are described as starting at $45 per month for 14 servings. A panel of science advisors, including sports nutritionist Chris Mohr, PhD, RD, nutrition strategist Tara D. Theis, performance leader Teena Murray and Dr. David Martin, is associated with the brand.

Founding story

Cofounders Eric Ji Sun Wu and Jahaan Ansari met in high school as co-captains of their soccer team. After Wu stopped playing competitive soccer in his senior year at Georgetown, he found supplement stores overwhelming and their products opaque, so he bought raw materials and formulated protein powders for himself and his roommates. He brought the idea of personalized protein to Ansari, then studying chemical engineering and computer science, who judged personalized nutrition a viable business. In their final year of college they built the company: Wu created formulations while Ansari developed the algorithm that assigns each customer a protein formulation.

Business model

Gainful sells consumer packaged supplements online on a subscription basis: after an initial order, customers are enrolled in recurring purchases, and subscriptions bundle access to advice from registered dietitians. Products are also sold à la carte through the company's e-commerce storefront, with promotional discounting (for example a first-order discount and seasonal sales).

Recurring direct-to-consumer subscription and one-time e-commerce sales of powders and supplement packets; subscriptions are reported to start at about $45 per month for 14 servings. Third-party data estimates annual revenue in the $1M–$10M range.

Traction

The company reports more than 300,000 customers on its website; other accounts cite over 3 million completed personalization quizzes and well over 850,000 orders. Team size is listed as 30 by Y Combinator and 25 by the company's own founder profile, while a third-party data provider estimates approximately 52 employees and annual revenue of $1M–$10M.

Latest developments

During 2025 Gainful announced a series of partnerships extending its personalized nutrition offering into fitness and health platforms: Chelsea Piers Fitness introduced Gainful's personalized nutrition on-site in May 2025, Eden announced a partnership in August 2025, and Trainerize announced a partnership in October 2025. The company also published a founders profile in August 2025 describing a 25-person team in New York.