Best Tessian Alternatives in 2026
8 ai email security tools compared against Tessian on features, pricing, and deployment model.
Why look for Tessian alternatives?
Tessian is a strong option for ai email security, but it's not the right fit for every team. Common reasons teams look elsewhere: now part of proofpoint — future as standalone product uncertain; not a full email gateway replacement.
Below we list 8 alternatives, broken down by deployment model. All data is aggregated from official documentation and community feedback.
Cloud-Managed Alternatives
Enterprise email security platform for advanced threat protection, compliance, and data loss prevention
Cloud email security platform with threat protection, archiving, and continuity
Microsoft's native email security for Microsoft 365 with XDR integration
AI-powered email security platform specializing in behavioral detection of social engineering attacks
Cloud email security gateway with AI-powered BEC detection and XDR integration
AI-powered anti-phishing platform with crowdsourced threat intelligence
Self-Hosted Alternatives
Email threat protection platform available as gateway appliance or cloud service
Enterprise email security gateway with Cisco Talos threat intelligence integration