Define Ventures

Define Ventures

San Francisco, Californiadefinevc.com

Overview

Define Ventures is a Silicon Valley-based venture capital firm that focuses exclusively on investing in early-stage digital health startups at the incubation, seed, Series A, and Series B stages. The firm's strategy centers on partnering with companies that serve multiple ecosystem partners, including consumers, payers, providers, employers, and life-sciences companies, combining Silicon Valley principles with deep healthcare operating experience.

Portfolio Companies

30

Investments

CompanyDateStageLead
9amHealthMay 2026Series BLead
9amHealthApr 2026Series BCo-investor
LuminaiApr 2026Series BCo-investor
HyroOct 2025Strategic Growth RoundCo-investor
HyroOct 2025Growth EquityCo-investor

Key People

Lynne Chou O'Keefe

Founder and Managing Partner

Sector & Stage Mix

Industry, funding stage, and valuation band breakdowns.

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SeedSeries ASeries BGrowth

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Investment Activity

Yearly cadence, pace, and funding raised over time.

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2021
2022
2023
2024
2025
2026

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FAQ

Firmographic Details

HeadquartersSan Francisco, California
Year FoundedN/A

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