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§ Founder & Investor Profile

David Tsao

Founder/CTO at BillionToOne

ActiveFounder Investor

Updated:Jul 13, 2026

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Quick Facts

Role: Co-Founder
Company: Silicon Valley CISO Investments
Status: Active
Type: Founder, Investor

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Recent News & Mentions

Jun 1, 2024FundingBillionToOne - Series D Dec 19, 2022Funding

BillionToOne - Debt / Series C

Dec 1, 2022FundingBillionToOne - Series C

Mar 1, 2022FundingBillionToOne - Series C

Jun 1, 2021FundingBillionToOne - Series B

Mar 1, 2019FundingBillionToOne - Series A

Aug 1, 2017FundingBillionToOne - Seed

Experience

Co-FounderFounderCurrent

Silicon Valley CISO Investments

Present - Present

Founder/CTOFounderCurrent

Present - Present

Frequently Asked Questions

Who is David Tsao?

David Tsao is Co-Founder at Silicon Valley CISO Investments.

What companies has David Tsao founded?

David Tsao co-founded Silicon Valley CISO Investments and has also been involved with BillionToOne.