John Brennan
Verified: Jun 2026 (SMTP Validated)🚀 High-VelocityFlexible Check Size
Background & Investment Thesis
Focus Industries
Active investor in security, cloud, b2b. Highly responsive to concise pitches with clear traction metrics.
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Key Deal Terms & Quick Facts
Audited venture due diligence summary for John Brennan
Undisclosed ($25k – $250k typical for early angels)
Direct angel check per syndicate / roundVerified (Protected — Unlock)
Direct mailbox protected against spamFrequently Asked Questions about John Brennan
What is John Brennan's typical angel check size?▼
John Brennan's investment check size typically ranges around Undisclosed ($25k – $250k typical for early angels), participating in early-stage financing rounds alongside leading venture capital funds and angel syndicates.
What stages and sectors does John Brennan invest in?▼
John Brennan primarily backs early-stage startups across Pre-seed, Seed stages, focusing on security, cloud, b2b.
What companies are in John Brennan's angel portfolio?▼
John Brennan actively participates in early-stage technology investments and venture syndicates.
How can startup founders contact or pitch John Brennan?▼
Founders can access verified direct email contact channels, AI-assisted pitch drafting, and syndicate warm intro paths for John Brennan through OpenAngels.