Abnormal AI vs Tessian
Abnormal AI
Go ahead, be human. Abnormal AI keeps your email protected
1504 employees · est. 2018 · Las Vegas, United States
Tessian
Cloud Email Security that intelligently prevents advanced email threats and protects against data loss
41 employees · est. 2013 · Boston, United States
Tessian is the older company (2018 vs 2013); Abnormal AI is the larger of the two.
Side-by-Side Comparison
| Metric | Abnormal AI | Tessian |
|---|---|---|
| Founded | ||
| Founded | 2018 | 2013 older |
| Headquarters | ||
| Headquarters | Las Vegas, United States | Boston, United States |
| Employees | ||
| Employees | 1504 larger | 41 |
| Industry | ||
| Industry | Cyber Security, Information Technology, Privacy and Security | AI, Cyber Security, Marketing |
| Funding Stage | ||
| Funding Stage | Venture round | Acquired |
| Total Funding | ||
| Total Funding | $284.00M | $130.17M |
| Funding Rounds | ||
| Funding Rounds | 4 | 12 |
| Services | ||
| Services | Abnormal Behavior Platform, Cloud Email Security, AI Security Mailbox, AI Phishing Coach, Security Posture Management | Cybersecurity Platform, Email Protection, Data Security and Governance, Threat Intelligence Solutions, AI-Powered Security Solutions, Security Awareness Training |
| Target Customers | ||
| Target Customers | Fortune 500 Companies, Technology Services, Information Security Teams, IT Operations, CISOs | Large Enterprises, Small and Medium Businesses, Government Agencies, Higher Education Institutions, Healthcare Providers, Financial Services, Internet Service Providers |
| Taxonomy | ||
| Taxonomy | AI-native Security PlatformHuman Behavior SecurityMachine Learning SecurityEmail SecurityInbound Attack PreventionCompromised Account Detection +9 | Cloud Email SecurityAdvanced Email Threat PreventionData Loss PreventionMachine Learning SecurityBehavioral Data SciencePhishing Attack Prevention +9 |
| Website | ||
| Website | abnormal.ai | tessian.com |
About Abnormal AI
Abnormal AI, founded in 2018, emerges as a pivotal player in the Cyber Security domain. The company's slogan, "Go ahead, be human. Abnormal AI keeps your email protected," captures its mission to deliver peace of mind in digital communication. This U.S.-based firm has carved a niche with its AI-nat...
About Tessian
Tessian, a prominent player in the AI and Cyber Security sectors, has earned a reputation for its innovative approach in cloud email security. Established in 2013, Tessian leverages machine learning and behavioral data science to provide comprehensive protection against sophisticated email-based thr...
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Compiled from the BounceWatch company index. We last looked at Abnormal AI on 30 Mar 2026, and Tessian on 2 Jun 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
