John Jack
Member, Board of Directors at Contrast Security
San Francisco, California
John Jack, Member, Board of Directors at Contrast Security is an active investor based in San Francisco, California. This profile covers what John Jack backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCInvestor
- Stages
- Seed
- Invests in
- Artificial IntelligenceHealthcare & BiotechSaaS & EnterpriseConsumer & RetailDeveloper Tools & DataCybersecurityRobotics & AutomationMobility & Logistics
- Location
- San Francisco, California
- Typical check
- $250K
- Past investments
- 3
Notable investments
How to reach John Jack
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Frequently Asked Questions
What does John Jack invest in?
John Jack invests in Artificial Intelligence, Healthcare & Biotech, SaaS & Enterprise and Consumer & Retail, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
How do I contact John Jack?
Unlock John Jack's verified email on Round Funded and send a personalized pitch. We surface only deliverable contacts so your outreach lands.
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