S28 Capital

Venture Capital

Early-stage venture fund run by operators and entrepreneurs, helping next-generation founders build their companies.

San Francisco, United States · 31+ investments · 58 portfolio companies

Seed
Early Stage
B2B Technology
Cybersecurity
Data & Analytics
Developer Tools
SaaS
Headquarters
San Francisco, United States
Founded
2015
AUM
$170.0M
Portfolio Companies
58
Total Investments
31
Last Investment
Oct 2025
Geographic Focus
United States, Asia, Canada, France, Israel, United Kingdom

Investment Thesis

Operator-led seed fund backing B2B software founders in developer tools, data, and security — run by immigrant entrepreneurs and former CTOs who invest based on technical conviction.

S28 Capital is a Venture Capital firm based in San Francisco, United States. It has made 31 investments in B2B Technology and Cybersecurity, including Hero, Seawise Capital and Rhumbix.

Portfolio58

Co-investors24

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24 co-investors across 112 shared portfolio companies — who they back alongside, and how often they lead.

Venture Capital ×18 · Hedge Fund ×2 · Corporate VC ×1 · 34 shared rounds

Investment History

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