A Security, an autonomous offensive security startup, emerged from stealth with $37 million in funding to help organizations identify and eliminate attack paths before they can be exploited by AI-powered adversaries.
The funding round was backed by Lightspeed Venture Partners and Cyberstarts, along with angel investors including Assaf Rapaport, CEO of Wiz, Yotam Segev, CEO of Cyera, and Cerca Partners. The company plans to use the capital to scale growth and expand its autonomous platform, which continuously discovers and remediates exploit paths that malicious AI agents could leverage.
Founded in 2025, A Security was created in response to the accelerating use of artificial intelligence in cyberattacks. The company says advances in frontier AI models have enabled threat actors to automate vulnerability discovery and exploitation at machine speed, allowing even unsophisticated attackers to deploy capabilities previously associated with nation-state actors.
A Security’s platform continuously identifies cross-domain attack paths, validates exploitability, and demonstrates how AI-enabled attackers could chain vulnerabilities together to compromise systems. Its offensive and defensive AI agents then drive remediation efforts with full audit trails and proof that vulnerabilities have been addressed.
The company is already working with organizations in finance, healthcare, critical infrastructure, and technology sectors, where security teams face increasing pressure to close exploitable attack paths faster than traditional manual testing cycles allow.
Yossi Torati, CEO and co-founder of A Security, previously spent nearly two decades helping enterprises respond to sophisticated cyberattacks, most recently serving as Director of Enterprise Security at incident response firm Sygnia. Co-founders Omer Gull and Yuval Itzchakov bring experience from Check Point Software, Hunters, and Israel Defense Forces Unit 8200.
Lightspeed partner Guru Chahal said the emergence of weaponized AI has rendered theoretical risk assessments insufficient, while Cyberstarts General Partner Hila Zigman noted that autonomous capabilities are already changing the speed and scale of offensive cyber operations.
Matt Hart, CISO of PTC, described the platform as a critical technology for validating exploitability and protecting businesses operating in environments where failure is not an option. Francisco Donoso, Chief Product and Technology Officer of Beazley Security, said the platform enables organizations to identify and remediate active exploit paths at machine speed, providing capabilities that are increasingly necessary in a post-Mythos environment.
KEY QUOTES:
“AI has changed the speed and scale of offensive cyber operations. Attackers are using agentic capabilities to find, chain and exploit weaknesses across environments, at a pace that human teams relying on manual processes cannot match. A is the only platform built to beat weaponized AI at its own game.”
Yossi Torati, CEO and Co-Founder, A Security
“Today’s cyber defenders need a weapon that can beat weaponized AI to the punch. We believe A Security is that platform. The days of theoretical risk are over.”
Guru Chahal, Partner, Lightspeed Venture Partners
“We invested in A because we believe the security industry is underestimating how dramatically AI is changing offensive cyber operations.”
Hila Zigman, General Partner, Cyberstarts
“A is a game changer, giving us a critical tool to validate exploitability and better protect our business.”
Matt Hart, CISO, PTC
