John Brennan
Angel investor in Los Angeles
Los Angeles, California
John Brennan, Angel investor in Los Angeles is an active investor based in Los Angeles, California. This profile covers what John Brennan backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCInvestor
- Stages
- Pre SeedSeed
- Invests in
- CybersecurityDeveloper Tools & Data
- Location
- Los Angeles, California
- Typical check
- $150K
- Past investments
- 6
Notable investments
Vulcan Cyber
Valence Security
build.securityCAKE CorporationEureka SecurityHow to reach John Brennan
Angels and operators like John Brennan reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded Accelerator.
Connect with John Brennan
Frequently Asked Questions
What does John Brennan invest in?
John Brennan invests in Cybersecurity and Developer Tools & Data, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does John Brennan invest at?
John Brennan typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is John Brennan's typical check size?
John Brennan typically writes checks around $150K. Use it as a signal for whether your raise fits their stage.
How do I contact John Brennan?
Unlock John Brennan's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.