Seaside Ventures

Seaside Ventures is an early-stage venture capital firm founded in 2021, operating between Santa Monica, California and Austin, Texas. The firm is co-led by founding partners Ryan Roddy and Harrison Valner, who together bring more than 20 years of combined operating and investing experience and have assembled a network of over 20 advisors and 30 strategic partners. Seaside's mission is focused on fueling the future of health and wellness — backing emerging technologies that improve health, boost happiness, and raise quality of life within the roughly $4 trillion global healthcare market. The firm's thesis targets startups that bridge scientific breakthroughs to real-world impact by addressing root causes of health challenges rather than symptoms. Seaside runs Fund I (a $10 million vehicle) alongside The Seaside Syndicate, which extends deal-by-deal access to aligned limited partners. Typical checks are in the low hundreds of thousands of dollars at pre-seed and seed. Across roughly 26 investments, named portfolio companies include ZBiotics (genetically engineered probiotics, $12 million Series A), StimScience (neuro-wellness, $10 million Seed in June 2025 led by Khosla Ventures), BiomeSense, Circulate, Adaptyx Biosciences, Calorify, and Rorra. The firm has produced two exits, the most recent being Aura Bora in February 2025. Seaside operates vertically across digital health, life sciences, food and beverage innovation, consumer wellness, supply-chain technology, and outdoor and active lifestyle — investing where rigorous science and genuine consumer demand overlap. Roddy and Valner approach each investment as a long-term partnership, working alongside founders on everything from early product validation to capital strategy and category positioning in health and wellness markets.