Abnormal Security, a next-generation email security company, raised $50m in Series B venture capital funding. The round was led by Menlo Ventures, with participation from early investor Greylock. The company intends to use the funds to double the size of its machine learning and data science teams.

The Abnormal Security cloud email security platform protects enterprises from targeted email attacks. Powered by Abnormal Behavior Technology (ABX), the platform combines the Abnormal Identity Model, the Abnormal Relationship Graph and Abnormal Content Analysis to stop attacks that lead to account takeover, financial damage and organizational mistrust. Though one-click, API-based Office 365 and G Suite integration, Abnormal Security sets up in minutes, requires no configuration and does not impact email flow.