Beyond Encryption Mailock for M365 vs CloudMask Secure Gmail: 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.

CloudMask Secure Gmail

Teams managing Gmail across startups and mid-market companies need CloudMask Secure Gmail if Gmail's native encryption doesn't satisfy your data residency or key control requirements; the tool keeps encryption keys entirely out of CloudMask's hands, which matters for regulated industries where Google's infrastructure alone won't pass audit. The user-controlled key model aligns with NIST CSF 2.0 Data Security principles by giving you genuine confidentiality control rather than relying on vendor promises. Skip this if your organization needs encryption across multiple email providers or requires formal key escrow for recovery scenarios; CloudMask is Gmail-only and doesn't solve for employees using Outlook or on-premises Exchange.