Cyber's Machine-versus-Machine Era: Why AI Needs a New Security Stack

Key points

Key takeaways from the Equity Podcast with Shardul Shah of Index Ventures on why AI is creating an entirely new cybersecurity stack (September 2026):

AI is a new category of security, not a cycle. Public cyber companies now carry close to a trillion dollars of combined market value; AI marks a step-change in how defence must be built, not a cyclical wave of spending.

Defence must go machine-speed. As AI collapses the cost of sophisticated attacks, an individual could unleash an agent swarm of 10,000 to run global ransomware; human-in-the-loop defence loses on compute and cost, so human-centric security vendors must evolve or be displaced.

Cyber insurance first, platforms second. His board-level advice opens with offloading risk through brokers and insurers such as Coalition, a firm he sits on the board of; then comes people, process and technology, backing security platforms over point solutions.

Platforms and AI-native builders win. Index looks for businesses with multiple use cases over time, such as 7AI, an AI-native security-agent company built from day one as a platform, reminiscent of how Wiz started, with $3.5 billion across seed, venture and growth funds to deploy.

Agent identity becomes a new security primitive. Enterprises now manage human and non-human identity: agentic identities behave differently and need new core primitives, while entity risk requires fresh categories, an area Wiz alumnus Tal Shlomo's startup Frame addresses.

Continuous security replaces periodic testing. Regulated, once-a-year pentesting and compliance scores are "discontinuous" and will not survive: AI widens the adversary landscape to nation states, syndicates and individuals, all able to launch more sophisticated attacks for less money.

Wiz is becoming a talent factory. Shardul guided Wiz through its $32 billion acquisition by Google, and expects its alumni to keep building: Enigma, founded by Wiz alumnus Jonathan Jacobe, was backed before incorporation; Dolly Rajik, Wiz's go-to-market lead, now serves as CRO at OpenAI.

Intuition beats pattern-matching. Index led six consecutive Wiz rounds, the largest aggregate investment in its history, yet he warns against confusing outcomes with decision quality: there is "no pattern," and rationalisation should pressure-test, not override, deep conviction in founders.

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