Ancient Greece didn't get remembered for its scaffolding. It got remembered for its foundations. The columns, the proportions, the basic architectural principles that were so solid that people kept building on top of them for two thousand years. That's the idea behind Act, and it's also the thesis behind our investment.

Act Security, founded by the team behind Medigate, emerged from stealth on July 28, 2026 with $60M across a $20M seed and $40M Series A. The Tel Aviv startup's cloud security platform targets AI agents inheriting bloated cloud permissions, arguing that 97% of cloud access sits unused and AI is now exploiting that sprawl faster than humans can patch it.

Bessemer Venture Partners backs Act Security from seed to Series A—company emerges from stealth with $60M to eliminate the access paths behind security breaches in the AI era.

Cloud security startup Act Security Ltd. says it’s primed and ready to help enterprises safely deploy artificial intelligence agents at large scale after raising $60 million in funding across two rounds.

Act Security tackles the spiraling patch problem caused by AI’s ability to find new vulnerabilities in existing cloud environments.

Seven months after Calcalist first revealed its funding, Act Security officially launches with a cloud security platform designed to eliminate the access pathways that AI-powered attacks increasingly exploit.

Cloud-focused Act Security has raised $60 million and emerged from stealth, CEO Jonathan Langer tells Axios Pro exclusively.

Explore Act's solution brief to discover how our action-centric approach secures your cloud from the ground up, eliminating risk directly at the source.

Every breach eventually comes down to the same root cause: Access. Security has spent a decade obsessed over chasing exposures and racking up findings, while access quietly sprawled out of control underneath. Today, Act Security is exiting stealth with a platform built to secure the cloud at its foundation, eliminating the access paths every attacker, human or AI, depends on.