Founded by Israeli cyber veterans, A Security emerges from stealth with backing from Lightspeed and Cyberstarts, saying its autonomous platform finds and fixes real exploit paths before AI-enabled attackers can chain them into breaches
A Security, a cyber startup built by Israeli security veterans, emerged from stealth Monday with $37 million in funding as it bets that artificial intelligence is changing not only how companies defend themselves, but how quickly attackers can find and exploit their weaknesses.
The New York-based company said the round was led by Lightspeed Venture Partners and Cyberstarts, with participation from angel investors including Wiz CEO Assaf Rappaport, Cyera CEO Yotam Segev and Cerca Partners.
A Security says it is building an autonomous offensive security and remediation platform designed to continuously discover real attack paths inside organizations, validate whether they can be exploited and help close them before malicious actors use AI to chain vulnerabilities into breaches.
“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,” said Yossi Torati, A Security’s CEO and co-founder.
“A is the only platform built to beat weaponized AI at its own game,” he added. “Operating autonomously with full contextual awareness, we don't stop at identifying and prioritizing isolated vulnerabilities. We discover the real-world exploit paths AI-enabled attackers will use to cause breaches, downtime, and business disruption and help organizations eliminate them before anyone gets the chance.”
The company’s pitch comes as cybersecurity teams face a new version of an old problem: security tools often flag long lists of vulnerabilities, but attackers rarely exploit them one by one. Instead, they look for combinations, misconfigurations and access paths that can be chained together to reach critical systems.
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A Security says its platform continuously finds and validates real attack paths inside organizations, then helps close them before AI-enabled attackers can chain vulnerabilities into breaches
(Photo: A Security)
A Security says AI is making that process faster and cheaper for attackers. The company argues that defensive teams need automated systems that can think offensively, test real exploitability and drive remediation at the same speed.
Unlike traditional penetration tests or periodic risk assessments, A Security says its platform continuously maps cross-domain attack paths across an organization. Its offensive and defensive AI agents stress test environments with scoped execution and full audit trails, then help remediate weaknesses both at the source and through compensating controls.
The company says the goal is not only to identify risk, but to prove whether an attack path is real and confirm that it has been closed.
“Today’s cyber defenders need a weapon that can beat weaponized AI to the punch,” said Guru Chahal, partner at Lightspeed. “We believe A Security is that platform. The days of theoretical risk are over. Threat actors are deploying agents that turn theory into practice 24/7.”
Cyberstarts General Partner Hila Zigman said the firm invested because AI is changing offensive cyber operations faster than many defenders realize.
“Attackers are already operating with autonomous capabilities, at a speed and scale defenders were never designed to handle,” she said. “What stood out to us about A from day one was the team’s deep understanding of real-world offensive operations, combined with a clear vision for how autonomous security must evolve in the AI era.”
Before founding A Security, Torati spent nearly two decades working with global enterprises on cyberattack response and resilience. He most recently served as director of enterprise security at incident response firm Sygnia, where he worked on advanced persistent threat cases and global incident response programs.
His co-founders, Omer Gull and Yuval Itzchakov, previously worked at Check Point Software, Hunters and the IDF’s Unit 8200, bringing experience in red-team operations, vulnerability research, AI engineering and cybersecurity infrastructure.
A Security says it is already working with large organizations in finance, healthcare, critical infrastructure and technology, where security teams are under pressure to validate and close real attack paths faster than manual testing cycles allow.
The company said the new funding will be used to scale growth and expand its autonomous offensive security platform.