21 Founders Backed by FirstMark (2026)

21 founders backed by FirstMark, with company, stage, and round detail. Includes ClickHouse and HowGood.

FirstMark founders (21)

FirstMark founders covers 21 founders on Estuary, Firsthand and Clerq and 16 other companies. The most common sectors are SaaS (5), AI Infrastructure (4) and Developer Tools (4). Members are based in 11 cities, led by New York, NY (10), London, UK (2) and Bengaluru, India (1). The remaining members span Fintech (3), E-commerce (2), Healthtech (1), Logistics (1) and Robotics (1). Companies represented include ClickHouse, Crisp, Gravie, Highbeam, HowGood, Momentum, Parametrix, Payy, Pickle, Porter, Posh and Sparta, plus 4 more. Every founder below links to a profile with their company, backers, and the filings behind each round.

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