Beyond Encryption Mailock for M365 vs RPost RMail Email Encryption: 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. Core capabilities include AES-256 end-to-end email encryption, Recipient identity verification via SMS, Q&A, or Unipass ID, Message revocation after send (including post-open)..

RPost RMail Email Encryption: Email encryption service with automated delivery and compliance tracking. built by rmail. Core capabilities include Automatic encryption method detection per recipient, Dynamic encryption with TLS and message-level fallback, AES 256-bit encrypted PDF message delivery..

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

Beyond Encryption Mailock for M365 differentiates with AES-256 end-to-end email encryption, Recipient identity verification via SMS, Q&A, or Unipass ID, Message revocation after send (including post-open). RPost RMail Email Encryption differentiates with Automatic encryption method detection per recipient, Dynamic encryption with TLS and message-level fallback, AES 256-bit encrypted PDF message delivery.

Beyond Encryption Mailock for M365 is developed by Beyond Encryption. RPost RMail Email Encryption is developed by rmail. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Beyond Encryption Mailock for M365 and RPost RMail Email Encryption 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.