Today, I’m proud to share that Prime Security has raised a $20 million Series A, led by Scale Venture Partners, with continued support from Foundation Capital and Flybridge Ventures.When Dima, Matan, Danny, and I started Prime almost two years ago, our hypothesis was simple: Security isn’t keeping up with development. Despite endless tools, day-to-day security engineering and architecture work still feels manual, fragmented, and slow. 

We experienced this problem first-hand. Dima’s previous security teams at PayPal were always playing catch-up, while Matan, Danny, and I were delaying releases at Own because of last-minute security requirements. Even two years ago, this was a huge problem.

What we didn’t expect was just how fast development itself would evolve. Everyone became an engineer. AI-powered coding tools exploded. Velocity went through the roof, and the bottleneck for security? It got 5× worse.

We are building Prime to change that.

The AI Security Architect - the Super-Tool Product Security Always Needed

LLMs changed everything. But we didn’t see them as a replacement for security engineers; we saw them as a way to scale their judgment.

From day one, our vision has been to democratize security knowledge across every development team, to make security as embedded and accessible as code review.

That’s what Prime is building: an AI Security Architect - the super-tool security teams have always needed. An agentic system that autonomously reviews design work, identifies risks, and recommends mitigations, before a single line of code is written.

With Prime, security teams can finally cover all development work, not just the 5–10 percent they can manually review today. The result? Teams eliminate review backlogs, accelerate development and save millions in process costs, sometimes tens of millions annually, all while actually improving security outcomes.

It’s not reactive security. It’s preemptive security, where risks are understood and resolved at the design stage, long before they ever become incidents.

We’ve been lucky to work with some incredible early partners - PayPal, Qualtrics, ThoughtSpot, Bumble, Yext, Redis Labs, and many others who believed in our vision early on.

Together, we proved our hypothesis: Product Security teams require tooling that lets them move at the speed of modern development, without compromising on risk visibility.

It’s not about scanning code faster. It’s about thinking about security earlier, when architecture, design, and product decisions are being made.

We started by focusing on the design stage of the product development lifecycle, but that is just the beginning. The challenges of securing modern development don’t end there. They start there.

This Series A funding gives us the resources to go deeper, expand our agentic AI capabilities, and grow our teams across the U.S. and Israel, all with the goal of leading the next era of product security.

We believe security shouldn’t slow you down. It should help you move faster confidently.

That’s what Prime is here to do.

— Michael Nov, Co-Founder & CEO, Prime Security

‍