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Biz Stone

Angel Investor

American entrepreneur and Twitter co-founder who invests as an angel in early-stage technology startups.

Palo Alto, United States · 5+ investments · 5 portfolio companies

Seed
Early Stage
SaaS
Social Media
Headquarters
Palo Alto, United States
Website
bizstone.com
Portfolio Companies
5
Total Investments
5
Last Investment
Jun 2025
Geographic Focus
United States

Investment Thesis

Angel investor backing early-stage technology companies, with a focus on social and consumer internet products.

Biz Stone is an Angel Investor based in Palo Alto, United States. It has made 5 investments, including OK Play, Yupp and Datarank. Focus areas include SaaS and Social Media.

Portfolio5

Co-investors24

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24 co-investors across 26 shared portfolio companies — who they back alongside, and how often they lead.

Venture Capital ×13 · Angel Investor ×6 · Individual ×3 · 24 shared rounds

Investment History

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