Abnormal Security Raises $50M in Series B Funding

Abnormal Security, a San Francisco, CA-based next-generation email security company, raised $50m in Series B venture capital funding.

The round, which brings total funding to $75m, 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. 

Led by Evan Reiser, CEO and co-founder, Abnormal Security is a next-generation cloud email security company that protects enterprises from targeted email attacks, account compromise and supply chain compromise. The platform uses an innovative AI-based approach that deeply understands the people, relationships and business processes to stop the most sophisticated cyber-attacks.  

The Abnormal platform deploys to Microsoft 365 and Google Workspace environments through native API integrations. Its AI threat detection engine analyzes a diverse set of data about people, relationships and business context to understand abnormal behavior and block socially-engineered attacks. The engine also clearly explains to users why an attack is blocked to provide transparency about the AI judgments applied to an environment. 



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