Beyond Encryption Mailock for M365 vs SEPPmail Secure Email Gateway: Side-by-Side Comparison (2026)

Beyond Encryption Mailock for M365: AES-256 encrypted email add-on for M365 with auth & revocation. built by Beyond Encryption..

SEPPmail Secure Email Gateway: built by SEPPmail AG..

Both serve the Email Encryption market but differ in approach, feature depth, and target audience.

Beyond Encryption Mailock for M365 is developed by Beyond Encryption. SEPPmail Secure Email Gateway is developed by SEPPmail AG. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Beyond Encryption Mailock for M365 and SEPPmail Secure Email Gateway serve similar Email Encryption use cases: both are Email Encryption tools, both cover Encryption. Review the feature comparison above to determine which fits your requirements.