Prime Security Raises $20M from Scale Venture Partners to Transform Product Security with the First Agentic Security Architect
Prime’s new platform accelerates development with automated security reviews and full visibility into design-level risks
NEW YORK CITY and TEL AVIV – December 9, 2025 – Prime Security, creator of the first Agentic Security Architect, today announced its $20M Series A funding. The round was led by Scale Venture Partners, with participation from Foundation Capital, Flybridge Ventures, and Ofir Ehrlich, CEO & Founder of Eon. The new funding will fuel Prime’s go-to-market expansion and accelerate development of its Agentic Product Security Platform, a growing suite of autonomous AI agents that continuously monitor, assess, and guide product security throughout the entire development lifecycle.
Modern development runs at machine speed, but security still operates like an assembly line, slow, manual, and dependent on scarce expertise. Today, security teams have the capacity to manually review only a small fraction of planned work before release, leaving the rest to chance. As AI-assisted coding accelerates development velocity, this gap keeps widening. Prime’s agentic platform automates this manual craftsmanship, transforming design-stage protection into a continuous, intelligent process that scales with engineering.
"Integrating security into the design phase has always been a technically challenging manual process. Prime's unique approach transforms this critical, time-consuming stage." said Ariel Tseitlin, Partner at Scale Venture Partners. "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 is developing a new era of Product Security, where AI agents bring security into the design stage of every software project and feature. Its flagship product, the Agentic Security Architect, autonomously conducts security design reviews and proactively identifies design flaws across development work. By embedding directly into engineering workflows, Prime enables organizations to accelerate reviews, cut manual effort and cost by more than 60%, and achieve nearly full coverage across planned development tasks.
“Modern product development is changing in front of our eyes,” said Michael Nov, Co-Founder and CEO of Prime Security. “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.”
After starting to commercialize the product earlier this year, Prime won the Black Hat 2025 Startup Spotlight this summer and is already working with dozens of customers including PayPal, Qualtrics, Bumble, ThoughtSpot, Redis Labs, and others with development teams of over 200 engineers who are seeing significant impact including:
- Up to 30x faster resolution of design-stage risks
- 100% of planned work receives security assessment versus 10-15% with manual reviews
- 50% reduction in time and cost spent on security reviews
“At PayPal, we know that security must evolve as fast as the threat landscape,” said Shaun Khalfan, CISO at PayPal. “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.”
By providing continuous, automated security assessment of all planned work, Prime empowers security teams to focus on strategic architecture while ensuring comprehensive coverage of every feature, enhancement, and change flowing through the development pipeline.
ABOUT PRIME SECURITY
Prime Security provides an agentic-powered platform that enables security teams to detect, prioritize, and mitigate risks at the software design phase. Founded in 2023 and headquartered in New York with offices in Tel Aviv, Prime integrates with leading engineering tools to deliver 100% coverage of development efforts without slowing engineering down. The company is SOC2 Type II certified and backed by Scale Venture Partners, Foundation Capital, Flybridge Capital Partners and PayPal Ventures. For more information, visit the website.
Media Contact:
Morgan Grandi
morgan@primesec.ai