Cloudstone Venture Fund

Cloudstone Venture Fund is a Redwood City, California-based venture capital firm founded in 2016 with a mission to improve the health and well-being of people globally. The firm was co-founded by Founding Partner Mark Zhang and General Partner Tom, and has since expanded its team for its second fund. Fund I comprises 24 investments, with 14 of those in healthtech companies — a concentration that reflects the firm's primary thesis from the outset. Cloudstone invests in technology startups across healthtech, AI, and software applications. The firm deploys seed and Series A checks ranging from $500,000 to $3 million per company. With 24 investments completed under Fund I, Cloudstone is raising Fund II with an exclusive focus on healthtech, narrowing the mandate to the sector where it has deepest experience. The portfolio spans digital health platforms, AI-enabled health tools, and software applications with applications in clinical and consumer wellness settings. Cloudstone's investment approach combines a mission-driven lens with commercial discipline — the belief that companies improving human health can also generate strong returns. The transition from a broad technology mandate in Fund I to a healthtech-only focus in Fund II signals growing conviction in the sector's depth and the team's ability to source and support the next generation of health technology companies.