Define Ventures

Venture fund

Stages: Seed, Series A, Series B
Cheque size: $3M to $25M
Based in: United States
Focus: Primary & Virtual Care, Mental & Behavioural Health, Women's Health

Define Ventures is a digital health venture firm founded in 2020 by Lynne Chou O'Keefe, formerly a partner at Kleiner Perkins. It invests from incubation through Series B and has raised roughly eight hundred million dollars, making it one of the largest early stage health technology investors.

Founder first digital health investing with deep payer relationships.

Notable investments

Folx Health
Kindbody
Author Health

Firm website

The journey

How Define Ventures got here, step by step.

2020
Define Ventures founded
Lynne Chou O'Keefe launched Define Ventures after serving as a partner at Kleiner Perkins.
2020
Focus on early stage digital health
The firm set out to partner with founders from incubation through Series B in health technology.
2021
Second fund raises 200 million dollars
Define closed its second fund to back early stage digital health startups.
2023
460 million dollars across two funds
Define Ventures announced raising 460 million dollars across two funds for digital health investing.
2024 to 2025
Assets approach 800 million dollars
The firm grew to roughly eight hundred million dollars under management.