Lionheart Ventures
Lionheart Ventures is a San Francisco-based, seed-stage VC firm founded in 2019 by David Langer. The firm invests in two primary areas: AI safety and responsible AI development, and frontier mental health technologies (psychedelic medicine and neuromodulation). Lionheart aims to bridge the gap between the existential risk and effective altruism communities and the broader technology sector, backing exceptional founders whose work could meaningfully reduce catastrophic risk while delivering attractive returns.
Funding Details
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Theory of Change
Lionheart believes that venture capital can be a lever for reducing existential risk by directing capital toward companies that make AI development safer and more beneficial, and that improve humanity's collective wisdom and decision-making through mental health technologies. By investing in AI safety companies, they aim to ensure the AI transition proceeds with appropriate human oversight and alignment. By investing in mental health and consciousness technologies, they target an underappreciated pathway to existential risk reduction: improving societal decision-making capacity, political stability, and cooperative behavior. The firm also aims to bridge the EA and existential risk communities with the startup ecosystem, building norms and infrastructure for responsible transformative technology development.
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Details
- Last Updated
- Apr 2, 2026, 10:10 PM UTC
- Created
- Mar 19, 2026, 10:31 PM UTC