A Security raises $37 million backed by Wiz CEO Assaf Rappaport and Cyera CEO Yotam Segev
Cyberstarts and Lightspeed led the investment in the startup, which is building AI agents designed to detect, simulate, and block autonomous cyberattacks before they reach enterprise networks.
A Security, an Israeli startup developing a platform to defend organizations against AI-powered cyberattacks, has raised a total of $37 million across two funding rounds.
The company initially secured a $5 million Seed round led by Cyberstarts. Five months later, it completed a $32 million follow-on round led by Cyberstarts and Lightspeed. The round also attracted prominent angel investors, including Assaf Rappaport, CEO of Wiz; Yotam Segev, CEO of Cyera; Merav Bahat, founder of Dazz, and Cerca Partners.
A Security is developing a platform designed to help organizations defend themselves against what it calls "Weaponized AI," cyberattacks conducted by autonomous AI agents. The platform deploys AI agents that continuously search for vulnerabilities, chain them together into potential attack paths, and identify how an attacker could gain access to critical systems. At the same time, defensive AI agents work to remediate those vulnerabilities and close security gaps as quickly as possible.
"We focus on agent-based attacks that operate end-to-end," said co-founder and CEO Yossi Torati. "Our goal is not just to identify vulnerabilities, but to close the entire attack chain before it can be exploited."
Toreti, who previously managed major cyber incidents involving cryptocurrency platforms and global enterprises, argues that cybersecurity is entering a fundamentally different era.
"One of our customers received intelligence from the FBI indicating they were vulnerable to a Russian cyber campaign," he said. "We identified the attack path before it could be exploited and helped prevent the attack."
According to Torati, modern cyber threats increasingly rely on autonomous systems rather than human operators.
"The reality is that today's attackers are increasingly AI-driven," he said. "The industry was built to defend against human adversaries, but the threat landscape is changing rapidly. AI systems can operate autonomously, continuously search for weaknesses, and scale attacks in ways humans cannot."
Addressing concerns about the risks posed by AI agents themselves, Torati said the company has implemented multiple layers of safeguards.
"The major AI model providers already build controls to prevent misuse, but we add additional oversight mechanisms," he explained. "We use supervisory agents that monitor other agents and enforce policies to ensure they operate safely, transparently, and within predefined boundaries."
Torati believes the cybersecurity industry faces a major inflection point over the next two years.
"We are likely to experience a significant cybersecurity crisis as organizations transition from defending against human attackers to defending against autonomous AI systems," he said. "The internet will increasingly be populated by AI agents searching for information and vulnerabilities around the clock. Capabilities that were once reserved for nation-states can now be accessed by almost anyone with a few clicks. The barrier to entry has fallen dramatically."
The company was founded in 2025 by Yossi Torati, Omer Gal, and Yuval Itzchakov.
Torati brings more than two decades of cybersecurity experience. During seven years of military service, he was responsible for computing systems and cybersecurity within the Israeli Navy. Most recently, he was Director of Enterprise Security at Sygnia, where he managed cyber crisis response efforts for large organizations worldwide.
Co-founders Omer Gal and Yuval Itzchakov served in Unit 8200 before holding senior positions at Check Point and Hunters. Their expertise spans offensive cybersecurity, vulnerability research, AI engineering, and cybersecurity.
The company says traditional security approaches, which often rely on periodic testing and manual assessments, are no longer sufficient in an era of AI-powered attacks. Instead, its platform continuously deploys autonomous attacker and defender agents simultaneously, allowing organizations to identify and block potential attack paths before they are exploited.
"Recent advances in AI have ushered in a new era in cybersecurity," said Hila Zigman, Partner at Cyberstarts. "Attack capabilities that were once the exclusive domain of intelligence agencies and nation-states are becoming accessible to almost anyone. The defenses organizations rely on today were simply not designed to withstand autonomous AI agents that can identify and exploit vulnerabilities at an inhuman pace."
