Human Security, a bot mitigation and fraud detection platform for enterprises, is merging with PerimeterX, a company focused on safeguarding web apps from account takeover and automated fraud.

As part of the deal, Human said that it has received a USD 100 million debt facility from Blackstone Credit, which follows seven months on from a USD 100 million growth round of funding, according to Techcrunch. PerimeterX, meanwhile, raised a USD 57 million funding round last year.

The problem both companies have been setting out to solve is that a vast chunk of online security and fraud incidents are driven by bots — and these bots have become more sophisticated through the years as they adapt their behavior to become more difficult to detect.

Sullivan & Cromwell served as legal counsel to Human Security with Yigal Arnon-Tadmor Levy as local counsel, in particular, Ben Sandler, Ofir Levy, Neta Goshen Brami, Josh Hauser, Ofir Paz and Basel Sader.

Fenwick & West served as US legal counsel to PerimeterX.