Prime Security, the creator of what it calls the first Agentic Security Architect, announced a $20 million Series A round led by Scale Venture Partners, with participation from Foundation Capital, Flybridge Ventures, PayPal Ventures and Ofir Ehrlich, CEO and founder of Eon. The company said the funding will support its go-to-market expansion and speed development of its Agentic Product Security Platform, a suite of autonomous AI agents that continuously monitor, assess and guide product security throughout the development lifecycle.
The company argues that while modern software development moves at “machine speed,” security processes remain slow, manual and dependent on limited expertise. Security teams, it says, can manually review only a small share of planned work before release, a gap that continues to widen as AI-assisted coding increases development velocity. Prime’s platform aims to automate this manual work and turn design-stage protection into a continuous system 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 describes its work as ushering in a new era of product security in which AI agents bring protection into the design stage of every software project and feature. Its flagship tool, the Agentic Security Architect, autonomously performs security design reviews and identifies design flaws across planned development tasks. By embedding into engineering workflows, the platform enables teams to accelerate reviews, reduce manual effort and cost by more than 60 percent and achieve nearly full coverage of planned development work.
“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 beginning to commercialize the product earlier this year, Prime won the Black Hat 2025 Startup Spotlight and is already working with dozens of customers, including PayPal, Qualtrics, Bumble, ThoughtSpot and Redis Labs. Companies with engineering teams of more than 200 developers have reported improvements, including:
• Up to 30 times faster resolution of design-stage risks
• Security assessment for 100 percent of planned work, compared with 10–15 percent under manual reviews
• 50 percent 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.”
Prime says continuous, automated assessment of all planned work allows security teams to focus on strategic architecture while ensuring full coverage of every feature, enhancement and change moving through the development pipeline.
Founded in 2023 and headquartered in New York with offices in Tel Aviv, Prime Security provides an AI-driven platform that helps security teams detect, prioritize and mitigate risks at the software design phase. The company integrates with leading engineering tools to provide full coverage without slowing development, is SOC 2 Type II certified and is backed by Scale Venture Partners, Foundation Capital, Flybridge Capital Partners and PayPal Ventures.