Beyond Encryption Mailock Enterprise vs DigiCert Secure Email (S/MIME) Certs: Side-by-Side Comparison (2026)

Short answer

Mid-market and enterprise security teams handling regulated data across Microsoft 365 and Google Workspace need Mailock Enterprise because its trigger-word detection and rule-based automation remove the human decision from when to encrypt,the actual failure point in most email security programs. The platform covers NIST PR.DS (data confidentiality via AES-256) and PR.AA (recipient authentication across SMS, Q&A, and Unipass ID) without requiring users to remember to act. Skip this if your organization has under 500 seats or needs DLP beyond keyword matching; Mailock solves encryption governance, not content discovery. Organizations that need legally defensible email encryption without rebuilding their mail infrastructure should start with DigiCert Secure Email (S/MIME) Certs. S/MIME works natively in Outlook, Gmail, and Apple Mail, meaning adoption friction stays low and you avoid the gateway appliance tax. The tool maps directly to NIST PR.AA (authentication via public/private key pairs) and PR.DS (message-level confidentiality and integrity), covering the core email security control most compliance auditors actually care about. Skip this if your threat model demands perfect forward secrecy or sender anonymity; S/MIME signs identities, not conceals them.