Beyond Encryption Mailock for M365 vs PreVeil Admin Features: 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 Admin Features

Mid-market and enterprise security teams handling classified or controlled information need PreVeil Admin Features for its multi-party approval gates on e-discovery, which prevents any single admin from accessing sensitive encrypted data without peer authorization. The tool covers all four NIST CSF 2.0 identity and data security functions, and its tamper-proof logging exports directly to SIEM systems so you're not trapped in a proprietary audit silo. Skip this if your organization uses Gmail or non-Outlook clients at scale; PreVeil's gateway design assumes Outlook-first environments and doesn't gracefully degrade for mixed deployments.