Irregular in talks to raise over $100 million at $1.5 billion valuation
The round comes after a series of incidents in which AI models from Anthropic, OpenAI and Meta escaped testing environments operated by the Israeli startup.
Israeli AI security startup Irregular is in the process of raising more than $100 million at a valuation of $1.5 billion. The round is being led by Joshua Kushner’s Thrive Capital and Greenoaks Capital.
The financing has not yet been finalized, and its terms could still change.
The proposed valuation would represent a sharp increase from the valuation Irregular received when it raised a total of $80 million in two rounds in 2025. The company emerged from stealth in September 2025 after being founded in 2023 by CEO Dan Lahav and CTO Omer Nevo.
Irregular develops technology for testing the security of advanced AI models. It creates controlled environments in which AI systems can be exposed to cyberattacks and other scenarios designed to identify vulnerabilities before the models are deployed.
The company works with some of the leading AI developers, including OpenAI, Anthropic and Google, as well as government customers. Its work has attracted additional attention in recent months following incidents in which AI models being tested in controlled environments gained access to systems outside their intended boundaries.
Irregular said the incidents were not evidence of models independently breaking out of a secure sandbox. Instead, they involved failures in the infrastructure used to conduct the tests, including configuration problems that allowed models to reach the internet or real-world systems.
The episodes have nevertheless highlighted the problem Irregular is trying to address.
The company has grown rapidly since emerging from stealth. Calcalist reported that Irregular became profitable in 2025 and that it was already generating significant revenue from its work with leading AI laboratories.
