Uncork Capital
Uncork Capital is a San Francisco-based seed-stage venture capital firm founded in 2004 by Jeff Clavier, who formalized his angel portfolio into one of Silicon Valley's earliest dedicated seed funds; it operated as SoftTech VC until rebranding to Uncork Capital in 2017. Led by managing partners Jeff Clavier and Andy McLoughlin, the firm invests at the seed stage with a "first to believe" conviction style, typically targeting 10-15% ownership and writing seed checks broadly in the $1.5M-$4M range across B2B applications and SaaS, developer tooling, infrastructure and security, consumer and marketplaces, frontier tech/hardware, and AI/ML. In May 2025 the firm closed $300M in fresh capital across Uncork VIII (a $225M seed fund) and Uncork Plus IV (a $75M growth fund), bringing it to roughly $1.2B in assets under management. Across 275+ investments and 100+ outcomes, its portfolio and exits include SendGrid, Fitbit, Poshmark, Postmates, Eventbrite, LaunchDarkly, Tailscale, Front, Shippo, ClassDojo, Groq, Human Interest, Carrot Fertility, and GPTZero.
Uncork Capital has 174 portfolio companies tracked on the APIs.io network, of which 33 (19%) publish APIs indexed here.
Its highest-rated API providers on the network are SendGrid, Torii, Fitbit, UserGems, Flux.
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.
Exemplar 1 Complete, well-documented, and agent-ready
Strong 1 Solid coverage with minor gaps
Developing 10 Usable, with meaningful gaps to close
Thin 15 Limited public surface area
Emerging 5 Early or largely undocumented
Minimal 1 Almost no public developer surface
Rest of Portfolio
141 further portfolio companies that don’t yet have a provider page on the network.
Scroll for all 141
Properties
Portfolio
Where the firm publishes its investments
Firm
The firm itself