AI-native cloud email security platform that uses behavioral AI to detect and stop phishing, business email compromise, and account takeover attacks.
Abnormal Security is an AI-native cloud email security company. Its behavioral AI platform learns the normal behavior of an organization's people, vendors, and systems, then detects and blocks email attacks that bypass traditional defenses, including phishing, business email compromise (BEC), and account takeover.
The company was founded in 2018 and is headquartered in San Francisco, California. In 2025 it rebranded its public identity to Abnormal AI and moved its main website to abnormal.ai. Evan Reiser, a co-founder, serves as chief executive officer.
The platform spans inbound email security, account takeover protection, an AI security mailbox for abuse triage, an AI phishing coach for end users, email posture management, and messaging security, all built on the company's behavioral AI models.
MSPs and internal IT teams use Abnormal Security for Inbound Email Security, Account Takeover Protection, AI Security Mailbox.
Best for: organizations that need to block phishing, business email compromise, and spam beyond native email security.
Abnormal Security pricing depends on your organization's size, the modules you enable, and your contract term. Tools in this category are usually licensed by subscription, billed per mailbox, per month, and scale with the users, endpoints, or sites you cover.
Public rate cards are not always available, and many vendors set final pricing through a quote or their MSP and reseller channel. To get an accurate Abnormal Security price for your environment, request a quote from Abnormal Security directly, or ask a managed IT provider that supports Abnormal Security to bundle licensing, deployment, and management into one predictable monthly cost.
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Abnormal Security is an AI-native cloud email security company founded in 2018. Its behavioral AI platform detects and blocks email attacks such as phishing, business email compromise, and account takeover that evade traditional email defenses. The company now operates publicly as Abnormal AI.
Abnormal Security is headquartered in San Francisco, California.
Abnormal offers inbound email security, account takeover protection, an AI security mailbox, an AI phishing coach, email posture management, and messaging security, all built on its behavioral AI platform.
Evan Reiser, a co-founder of the company, is the chief executive officer of Abnormal Security.