Abnormal Security

Abnormal Security, now branded Abnormal AI, is an email security tool. It uses behavioral AI to learn how each employee and vendor normally communicates, then flags emails that break that pattern, such as a fake invoice or a spoofed executive request. It targets phishing, business email compromise, and account takeover attempts that slip past standard email filters. It connects to Microsoft 365 and Google Workspace through an API, so there are no changes to mail routing records, and plugs into tools like Slack, Okta, CrowdStrike, and Splunk. Abnormal reports it catches over 1,200 attacks per 1,000 mailboxes each month that standard secure email gateways miss, and says more than a quarter of Fortune 500 companies use it.

This fits a company already running Microsoft 365 or Google Workspace that wants a second layer beyond built-in filtering, especially where finance or HR staff are frequent phishing targets. A sensible starting point is a short trial running it alongside your current email filter before you replace anything. Planning pricing runs roughly 15 to 30 dollars per employee per year; this is an estimate, not a quote, so confirm current pricing with Abnormal directly. Two risks: it learns from your own traffic, so accuracy takes a few weeks to reach its best level, and added modules like vendor fraud protection or AI governance cost extra, so check what is bundled in your quote.