Abnormal Security Raises $250 Million at $5.1 Billion Valuation

Abnormal Security is a cybersecurity startup dedicated to protecting organizations from the growing menace of targeted email attacks. Abnormal Security's platform leverages behavioral data science and AI to model the unique communication patterns within an organization, enabling it to detect anomalies that may signal potential threats.

Abnormal Security has raised $250 million in a Series D round, increasing the company’s valuation to $5.1 billion. The new round was led by Wellington Management with participation from existing investors Greylock Partners, Menlo Ventures, Insight Partners, and the Falcon Fund. In total, Abnormal Security has raised nearly $546 million to date.

Abnormal Security, San Francisco, California, United States, was founded in 2018 by Evan Reiser and Sanjay Jeyakumar. In 2022, the company joined the unicorn club. “This funding allows us to further invest in our human behavior AI platform to protect more people across their everyday applications while enabling customers to accelerate their AI initiatives with autonomous AI solutions,” said Abnormal co-founder and Chief Executive Evan Reiser.