Hello, world.
We're Tenzai.

Hackers have always seen the world differently. Where others follow rules, they test them. They find beauty in systems, and truth in their flaws.

That curiosity, that instinct to probe, break, tinker and understand, has repeatedly made the internet a safer place for all of us over the years. Their skill is rare: the ability to find vulnerabilities where others see stability. They’re the ones who expose what is broken before anyone else can exploit it. Think of them as an immune system for software: they surface threats that the rest miss, and force the system to heal.

That’s why penetration testing became the golden standard of security. It became the backbone of trust in every enterprise: the proof that what we build can endure scrutiny.

But, mastery doesn’t scale. Scarcity of talent meant that the best hackers are rare, their craft slow, their reach limited. All the while, the systems that have to be tested grow and evolve by the hour.

Then came AI. Tireless, exacting, and unbound by human pace of learning, analyzing data and understanding context. Modern AI models are trained in all disciplines of networking, engineering, math, logic, languages and even social engineering.

For the first time, we could capture the brilliance of the minds of those rare, singular, elite hackers- and scale it infinitely.

That’s where Tenzai comes in.

We’re closing the scarcity gap with AI hackers that think like adversaries, act like them, and help fix what they find before the real ones do. Our agentic penetration testing platform continuously hacks, exploits, and remediates vulnerabilities across enterprise applications,relentlessly, at the speed of AI.

We spent decades in offensive cyber - building and breaking systems at the highest level, from military intelligence units to category-defining companies like Guardicore and Snyk. Now, backed by $75 million in seed funding from Greylock, Battery Ventures, Lux, Swish Ventures, and others, we’re using that experience to defend the world’s software: autonomously, continuously, and in depth.

Hackers were the first to see how fragile the digital world really is. We’ve built one that never sleeps.

AI has changed the rules. Security must change with it.

If this mission speaks to you, join us.

— The Tenzai Team