Irregular builds cyber test ranges for the companies developing the most capable AI models. OpenAI, Anthropic, Google and government customers use its environments to see how unreleased systems behave under attack before deployment. CTech reports that the Israeli startup is now in talks to raise more than $100 million at a $1.5 billion valuation, with Thrive Capital and Greenoaks Capital leading. The financing isn’t final and its terms could change.
A test can involve thousands of simulated runs over roughly 48 to 72 hours. Irregular gives a model an objective inside a synthetic environment patterned on a real attack, then watches whether it can map systems, find credentials, reach sensitive data and avoid detection. The customer gets evidence about capabilities and failure modes it can address before release, rather than a generic security score.
Irregular sells that work directly to model developers and government organizations. Its founders told CTech in April that customer contracts made the company profitable in 2025. They described its first product as infrastructure for analyzing models, simulating attacks and identifying unfamiliar vulnerabilities, with those findings feeding the defenses built around later systems.
The reported raise would follow $80 million of financing across two rounds in 2025, when Irregular emerged from stealth. CTech said the proposed valuation marks a sharp increase from the valuation attached to those rounds. Irregular was founded in 2023 by CEO Dan Lahav and CTO Omer Nevo.
The same test environments that create Irregular’s value have also become its sharpest operating risk. In August, the company said internet access was unintentionally enabled in one evaluation scenario; some models then took offensive actions against real systems while believing they were in a simulation. Irregular said it remediated the setup, expanded reviews and added safeguards.
That failure doesn’t show that models independently defeated a properly configured sandbox. It does expose a practical tradeoff: realistic cyber tests sometimes need controlled internet access, but that access can turn a setup error into real-world activity. Irregular is asking investors to value the company at $1.5 billion while it scales both the sophistication of its tests and the containment around them.