Venture in Security | Ross Haleliuk | Substack

Helping security practitioners, entrepreneurs, investors and executives build the future of cybersecurity. Click to read Venture in Security, by Ross Haleliuk, a Substack publication with tens of thousands of subscribers.

ventureinsecurity.net

Venture in Security | Ross Haleliuk | Substack · Aug 25, 2026

CYBERSECURITY AND THREAT INTELLIGENCE

How AI is actually remaking security

AI spells the end of security by obscurity

Venture in Security | Ross Haleliuk | Substack · Jul 14, 2026

ENTREPRENEURSHIP AND STARTUPS

If everyone agrees with your cyber startup idea, you’re either wrong or too late

Every major cyber company was built on conviction, not consensus

ROB LEEFOUNDATION CAPITAL

Venture in Security | Ross Haleliuk | Substack · Jun 16, 2026

CYBERSECURITY AND THREAT INTELLIGENCE

11 generalist mental models applied to cyber: CISOs’ and founders’ guide

A set of generalist frameworks (mental models, principles, or whatever you want to call them) that 100% apply to cyber.

Venture in Security | Ross Haleliuk | Substack · Jun 10, 2026

ENTREPRENEURSHIP AND STARTUPS

What Israeli dominance in cyber means for non-Israeli cybersecurity founders

Sharing some thoughts about Israeli and non-Israeli security startups

ISRAELUS

Venture in Security | Ross Haleliuk | Substack · Jun 02, 2026

CYBERSECURITY AND THREAT INTELLIGENCE

Four questions that answer if a security product will survive in the AI-first world

A few questions I think about when I evaluate if a company or a market category is going to stick around.