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Holly Ventures

San Francisco, CA · Invests in US; MENA · Website

SeedCybersecuritySecurity & Cybersecurity

Thesis

The world's best cybersecurity founders deserve a dedicated seed-stage partner focused entirely on their success, starting from Day Zero. Holly Ventures provides access, hands-on engagement, and a high-density network — not just capital.

Likely not a fit for

No non-cybersecurity investments. No Series A or later stage. Does not lead rounds.

How they invest

Lead or follow
Usually follows
Typical decision
~2 weeks
Warm intro
Not required
Involvement
Takes a board seat
Fund status
Actively deploying
Assets under mgmt
$33M
Decision process
Solo GP

Partners & team

1 contact on file

JB

John Brennan

General PartnerFounder & Managing Partner · Primary contact

+ Pitch

Portfolio

Recent activity

Holly Ventures in the news

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Research briefRead more
Holly Ventures Research Overview Holly Ventures is a $33 million solo-GP seed fund that invests exclusively in cybersecurity startups from "Day Zero" — the earliest possible stage of company building, including ideation. Founded by John Brennan in 2025 and headquartered in San Francisco, the firm is intentionally designed as a counter-model to the large, multi-stage cyber platforms that have come

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