Beyond Encryption Mailock for M365 vs PreVeil Security: Side-by-Side Comparison (2026)

Beyond Encryption Mailock for M365

SMB and mid-market teams standardized on Microsoft 365 should pick Beyond Encryption Mailock for M365 if message revocation is non-negotiable; the ability to recall emails even after a recipient opens them covers the mistake you'll inevitably make sending sensitive data to the wrong person. AES-256 encryption with SMS and Q&A recipient verification handles NIST PR.AA without requiring users to manage separate identity infrastructure. Skip this if your organization needs DLP that catches data before it leaves the network or if you're already enforcing encryption at the gateway level; Mailock layers on top of M365 rather than replacing email security controls.

PreVeil Security

Mid-market and enterprise teams handling classified or controlled data will get the most from PreVeil Security because its zero-trust architecture eliminates the server as a decryption point, which is the actual attack surface most email encryption tools ignore. DFARS and ITAR compliance is built in, not bolted on, and the cryptographic key-based authentication replaces the password attack vector entirely. Skip this if your organization needs broad endpoint protection or threat detection; PreVeil is encryption and access control, period, and it assumes you're handling that threat layer elsewhere.