Beyond Encryption Mailock for M365 vs PreVeil: 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)..

PreVeil: Free E2E encrypted email & file sharing for browser and desktop. built by PreVeil. Core capabilities include End-to-end encrypted email messaging, Encrypted file sharing, Secure cloud drive sync and storage..

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). PreVeil differentiates with End-to-end encrypted email messaging, Encrypted file sharing, Secure cloud drive sync and storage.

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

Beyond Encryption Mailock for M365 integrates with Microsoft 365, Microsoft Outlook, Exchange Online, Unipass ID, CRM (generic). PreVeil integrates with Outlook, Gmail, Windows File Explorer, Mac Finder. Check integration compatibility with your existing security stack before deciding.

Beyond Encryption Mailock for M365 and PreVeil serve similar Email Encryption use cases: both are Email Encryption tools, both cover Encryption. Key differences: Beyond Encryption Mailock for M365 is Commercial while PreVeil is Free. Review the feature comparison above to determine which fits your requirements.