Astelia, a platform founded by former leaders of Israel’s National Red Team, has raised fresh capital as enterprises grapple with a surge in AI-driven cyber threats.
The company, which focuses on exposure management and vulnerability prioritisation, is already working with dozens of customers, including leading Fortune 500 companies.
The firm has secured $35m in combined seed and Series A funding. The round was led by Index Ventures and Team8, with participation from Holly Ventures.
The funding comes at a time when security teams are under mounting pressure. Organisations are now facing an average of 135 new vulnerabilities every day, marking a 40% increase on the previous year. At the same time, AI-powered threats are accelerating attackers’ ability to exploit weaknesses, with around a quarter of successful breaches taking place within 24 hours of a vulnerability being disclosed. According to the company, 78% of CISOs say AI-driven attacks are already affecting their security posture.
Astelia argues that while security teams understand not all vulnerabilities carry the same risk, existing tools often overwhelm them with alerts and limited clarity on what is genuinely exploitable. Its platform combines deep analysis of an enterprise’s environment with agentic AI. It maps network topology, segmentation and existing security controls, while autonomous AI agents — trained by vulnerability research experts — assess the technical requirements needed to exploit specific weaknesses.
By correlating exploitability with real-world reachability and potential attack paths, the platform identifies the small proportion of vulnerabilities that create meaningful exposure. In some deployments, the company said that out of nearly three million vulnerabilities, only around 30 were truly exploitable. It then provides environment-specific remediation plans designed to reduce exposure without forcing unnecessary patches in live production systems, helping security and IT teams cut remediation costs and time.
Astelia said it plans to use the new capital to expand its AI-driven analysis capabilities, scale customer deployments, deepen technology partnerships and grow its engineering, research and global go-to-market teams. The company is also focused on advancing attack-path modelling to support organisations shifting away from volume-based scanning towards evidence-driven exposure management.
Alon Noy, CEO and co-founder of Astelia, said, “When you’ve spent years on both the offensive and defensive sides, you learn pretty quickly that most of the vulnerabilities defenders worry about are irrelevant to how attacks actually work. We built Astelia because seeing that gap from both sides made it clear the industry was optimizing for the wrong problem. Security teams need to see their environment the way an attacker does, not the way a scanner does.”
Juriaan Duizendstraal, partner at Index Ventures, said, “As AI reshapes both attacker capabilities and defensive expectations, the strategic imperative for enterprises is to move from assumed risk to provable exposure. Solutions that show where organizations are actually exposed enable CISOs to align cybersecurity with business priorities, reduce wasted effort, and turn vulnerability management from a reactive scramble into a preemptive defense.”
Amir Zilberstein, managing partner at Team8, added, “What convinced us about Astelia was the team and the worldview they bring. Their background gives them a rare, end-to-end understanding of how security failures actually emerge inside real environments – not in theory. That perspective is embedded in the product itself. Astelia cuts through vulnerability noise by grounding decisions in real exposure, and we believe this team is redefining how enterprises operationalize security.”
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