David Langer is the Founding Partner and Managing Partner at Lionheart Ventures. See portfolio, sector focus and contact routes.
David Langer is the Founding Partner and Managing Partner at Lionheart Ventures, a San Francisco-based venture capital firm, and is a two-time technology entrepreneur who previously co-founded and served as CEO of GroupSpaces [1][3]. His firm’s investment thesis targets pre-seed and seed-stage startups, with a primary focus on transformative mental health companies, particularly those in psychedelic medicine [5][9]. Lionheart Ventures typically leads or co-leads these early rounds, seeking 5–10% ownership and deploying checks that generally range from $100K to $5M [7][9]. Notable portfolio companies include Anthropic, HealthcareAgents (also known as Encultured AI), Wonder Sciences, Goodfire, Nuanced, Reprompt, and Piramidal [10]. Langer holds an MA (Hons) in Mathematics from the University of Oxford and serves as an advisor to Risk Ledger, Codility, and Entrepreneur First, while also mentoring at Seedcamp and writing as an entrepreneurship columnist for The Gateway [3][10]. He has described Lionheart’s strategy as obtaining meaningful ownership in early-stage mental health innovators, reflecting a distinctive point of view centered on psychedelic medicine as a transformative therap
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