Prime Security, a US-based creator of autonomous agentic security tools for software development, has raised fresh capital of $20m
The company, known for building AI-driven systems that embed directly into engineering workflows, has set out to redefine how software teams manage and scale security across modern development environments.
The Series A round was led by Scale Venture Partners, with additional backing from Foundation Capital, Flybridge Ventures and Ofir Ehrlich, CEO and founder of Eon. The investment marks a significant step in Prime Security’s expansion and reinforces rising investor interest in agentic AI for cybersecurity.
Prime Security focuses on bringing automation and intelligence into the earliest stages of development, where design decisions often create the most critical vulnerabilities. Its platform combines a suite of autonomous AI agents that continuously monitor, analyse and guide engineering teams, replacing manual review processes that many organisations still rely on. This approach aims to bridge the widening gap between rapidly accelerating AI-assisted development and traditional security workflows, which often lack the capacity to assess the full volume of planned work.
The new funding will be used to scale Prime’s go-to-market operations and speed up development of its Agentic Product Security Platform, including its flagship Agentic Security Architect. This technology autonomously conducts security design reviews and proactively identifies risks before development begins, helping organisations reduce manual review costs by more than 60% and provide nearly complete coverage of planned engineering tasks.
Prime has already gained industry recognition after beginning commercial roll-out earlier this year. The firm won the Black Hat 2025 Startup Spotlight and is working with dozens of enterprise customers, including PayPal, Qualtrics, Bumble, ThoughtSpot and Redis Labs. These organisations, many with engineering teams exceeding 200 developers, have reported notable improvements such as up to 30x faster resolution of design-stage risks and full assessment of all planned work—far ahead of the 10–15% typical with manual reviews.
Scale Venture Partners partner Ariel Tseitlin said, “Integrating security into the design phase has always been a technically challenging manual process. Prime’s unique approach transforms this critical, time-consuming stage. This team are both visionaries and operators. Having led technical, GTM, and security teams at companies like PayPal and Own, and scaled enterprise Product Security programs, they’ve experienced firsthand the problem they’re solving. This combination of category-creation vision and deep operational expertise is what defines market leaders.”
Prime Security co-founder and CEO Michael Nov said, “Modern product development is changing in front of our eyes. We founded Prime to redefine how security fits into this new world, with agentic systems that operate starting at the design phase, not after development. Our mission is to build security that scales with engineering instead of slowing it down.”
PayPal CISO Shaun Khalfan said, “At PayPal, we know that security must evolve as fast as the threat landscape. Prime Security’s autonomous, design-stage reviews give us continuous and adaptive visibility across our engineering ecosystem, enabling us to identify and address risks earlier in the software development lifecycle. This capability helps us move with speed and confidence to deliver for our customers and strengthen trust in our business globally.”
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