Abnormal Security

Abnormal Security is the leading AI-native human behavior security platform that protects organizations from sophisticated cyber threats that traditional email security solutions miss. Founded in 2018 by Evan Reiser (CEO) and Sanjay Jeyakumar (CTO), the company pioneered the use of behavioral AI to detect and prevent advanced email attacks, business email compromise (BEC), account takeovers, phishing, and social engineering schemes that exploit human vulnerability. The platform has rapidly become a critical security layer for enterprises, now protecting over 3,000 organizations across 35 countries, including 17% of the Fortune 500.

Abnormal's technology represents a fundamental shift from traditional signature-based email security to behavioral anomaly detection powered by machine learning. By analyzing human identity, behavior patterns, relationships, and business processes across cloud email environments and collaboration applications, Abnormal identifies threats that bypass conventional filters. The company's platform has evolved from pure email protection to comprehensive human behavior defense, addressing emerging threats around social engineering and fraud across the entire communication landscape.

The company's growth trajectory has been extraordinary. In August 2024, Abnormal raised $250 million in Series D funding at a $5.1 billion valuation, led by Wellington Management with participation from Greylock Partners, Menlo Ventures, Insight Partners, and CrowdStrike Falcon Fund. The company has achieved over 100% year-over-year ARR growth, recently surpassing $200 million in annual recurring revenue. This success reflects the critical importance of Abnormal's mission: protecting organizations from the human-targeted attacks that represent the fastest-growing and most damaging category of cybersecurity threats.

Abnormal's leadership team combines deep expertise in machine learning, cybersecurity, and enterprise software. CEO Evan Reiser previously led product management and ML teams for Twitter's advertising business and co-founded multiple successful companies including Bloomspot (acquired by JPMorgan Chase) and AdStack (acquired by TellApart). The company has attracted top executive talent including CFO Smita Sanadhya (former Microsoft and Okta executive), Chief Legal Officer Jeff True (former Zoom legal head), and James Yeager (CrowdStrike veteran) heading public sector sales. With this world-class team and industry-leading technology, Abnormal is positioned to define the future of human behavior security as organizations worldwide recognize that protecting people requires different approaches than protecting systems.