Exclusive for Greylock portfolio companies

An AI Hacker for the companies Greylock backs.

Tenzai is an autonomous pentester with the craft of an elite human - ranked in the top 1%. Greylock's portfolio gets priority access, preferred terms, and a first report in hours.

  • 120X Faster
    Compliance reporting, from weeks to hours
  • Top 1%
    Across top hacking platforms
  • $75M Seed
    From Greylock, Battery, Lux
// Redeem offer

Start with one application. First report in hours.

We'll respond within 1 business day to scope and confirm eligibility.
The offer

A pentest that keeps pace with how you ship.

4 things Greylock portfolio companies get when they engage Tenzai - priced and scoped for the stage you're at.

01

Pass enterprise security reviews faster.

Audit-ready pentest evidence you can share with enterprise buyers in vendor reviews — without waiting weeks for a traditional manual engagement.

02

Find real, exploitable risk.

Tenzai runs AI-powered offensive testing across your web app and APIs to uncover issues that actually matter: authentication and access-control gaps, injection, business-logic abuse, and chained vulnerabilities scanners cannot see.

03

Choose the right cadence as you scale.

Start with a one-time compliance report. Move to release-ready or continuous testing as your product and attack surface grow — multi-app and frequent-release cadences supported.

04

Audit-ready deliverables, on demand.

Optional human-signed report for SOC 2, ISO, and procurement requirements. Clean artifact, attacker reasoning, and a remediation path — the same output an excellent human pentester would produce.

Top 1%

Across 6 competitive hacking platforms. Entry open, results public.

120x

Compliance report delivery: 30 days → 8 hours.

25×

Across top hacking platforms

0→100%

Coverage of AI-generated and vibe-coded environments.
websec.fr
hack.arrrg.de
websec.co.il
Lakera Gandalf
pwnable.tw
dreamhack.io
In their words

What customers say after a Tenzai AI hacker run.

“Tenzai took in complex authentication and authorization context  in an easy setup, and found key IDORs in our API microservices."
— Head of Security, leading fintech
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Claim the offer

See what a top-1% hacker finds in your application.

Most Tenzai engagements start with a single application and a single conversation. The first report arrives in hours.

Redeem offer →