Abnormal Security, Email Protection Firm, Raises $50 Million In Series B Funding

Abnormal Security, an email security startup, has raised $50 million in Series B funding, bringing its total financing to date to $75 million. 

The round was led by Menlo Ventures, with participation from early investor Greylock Partners.

The firm will use the money to double the size of its machine learning and data science teams.

Abnormal’s platform can be deployed to Microsoft 365 and Google Workspace environments with one click through native API integrations, the company says. 

“Abnormal’s AI-powered detection has autonomously stopped incredibly sophisticated attacks,” states Mike Britton, chief security and privacy officer of Alliance Data. 

Abnormal says its own research shows that business email compromise (BEC) attacks increased 15% from the second quarter to the third quarter of this year. 



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