Susa Ventures
Susa Ventures is a San Francisco-based early-stage venture capital firm founded in 2013 by Chad Byers, Leo Polovets, and Seth Berman on the belief that founders are the lifeblood of progress. Susa is a high-conviction, low-volume seed investor that concentrates on data-centric companies with durable competitive moats such as proprietary data, economies of scale, and network effects, and it deliberately caps each partner at a small handful of active companies so it can operate alongside founders in a late-stage, hands-on manner at the earliest stages. The firm invests primarily at pre-seed and seed (occasionally Series A), writing initial checks that typically range from roughly $1M to $5M across artificial intelligence, fintech, healthcare, logistics and supply chain, cybersecurity, developer tools and infrastructure, and consumer. Susa is known for a founder-first posture (it avoids forcing founders out) and for an unusually high seed-stage unicorn hit rate, with notable investments including Robinhood, Flexport, Andela, Newfront, Stord, Human Interest, Mux, Stedi, Viz.ai, and Casetext. The firm closed Fund V at $175M in 2025 and also runs the experimental Humba Ventures vehicle for frontier bets. This profile tracks Susa's identity and its portfolio graph across the API Evangelist network.
Susa Ventures has 21 portfolio companies tracked on the APIs.io network, of which 5 (24%) publish APIs indexed here.
Its highest-rated API providers on the network are Stedi, Stord, Flexport, Namely, Mux.
Portfolio on the Network
Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.
Developing 1 Usable, with meaningful gaps to close
Rest of Portfolio
16 further portfolio companies that don’t yet have a provider page on the network.
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