Beyond Encryption Mailock for M365 vs DigiCert Secure Email (S/MIME) Certs: 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)..

DigiCert Secure Email (S/MIME) Certs: S/MIME certificates for end-to-end email encryption and signing. built by DigiCert. Core capabilities include End-to-end email encryption using S/MIME, Digital message signing with public/private key pairs, Automated certificate request and delivery..

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). DigiCert Secure Email (S/MIME) Certs differentiates with End-to-end email encryption using S/MIME, Digital message signing with public/private key pairs, Automated certificate request and delivery.

Beyond Encryption Mailock for M365 is developed by Beyond Encryption. DigiCert Secure Email (S/MIME) Certs is developed by DigiCert. 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). DigiCert Secure Email (S/MIME) Certs integrates with Gmail, Yahoo Mail, Microsoft Outlook, Apple Mail. Check integration compatibility with your existing security stack before deciding.

Beyond Encryption Mailock for M365 and DigiCert Secure Email (S/MIME) Certs serve similar Email Encryption use cases: both are Email Encryption tools, both cover Encryption. Review the feature comparison above to determine which fits your requirements.