Abnormal Security Clinches New Funding at $5.1 Billion Valuation

Abnormal Security Corp. raised $250 million in a funding round valuing the startup at $5.1 billion, highlighting investors’ appetite for AI companies trying to reinvent existing technology categories like security.

San Francisco-based Abnormal uses AI to protect customers from email- and app-based cyberattacks. It has gained traction as “the rise of generative AI has enabled even petty criminals to create highly-sophisticated attacks at scale,” the company said in a statement.

Chief Executive Officer Evan Reiserand Chief Technology Officer Sanjay Jeyakumar, who founded the company in 2018, previously worked together at Twitter. There,Reiser led product management and machine learning ...