Mark Fiorentino

Mark Fiorentino is an investor at Bain Capital Ventures based in San Francisco, California, where he specializes in early-stage financial technology and enterprise software. Prior to his current role, he served as a Principal and Partner at Index Ventures, focusing on United States financial technology and B2B SaaS startups. During his tenure at Index Ventures, Fiorentino led investments in recognizable companies such as RevenueCat, Loop, and Pomelo, typically writing initial checks ranging from $500,000 to $1 million. Before entering the venture capital industry, he spent nearly five years in operating roles at Stripe, gaining deep experience across corporate development, global growth, business strategy, credit underwriting, and fundraising. His current investment focus centers on back-office efficiency, working capital solutions, earned wage access, and compliance platforms within the broader financial technology and enterprise software sectors.