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Beyond Encryption Mailock for Outlook is a commercial email encryption tool by Beyond Encryption. Retarus Enterprise Cloud Fax is a commercial email encryption tool by Retarus. Compare features, ratings, integrations, and community reviews side by side to find the best email encryption fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
SMB and mid-market teams that need to stop encrypted emails from being forwarded or screenshotted after delivery should use Beyond Encryption Mailock for Outlook, since message revocation works even after recipients have opened attachments. The tool covers NIST PR.DS and PR.AA through AES-256 encryption and multi-factor recipient authentication, eliminating the "trust the recipient" problem that plagues standard TLS. Skip this if your org requires integration with Gmail or non-Microsoft clients; Mailock is Outlook-only and leaves users on other platforms without encryption protections.
Enterprise and mid-market security teams handling regulated document workflows (healthcare, financial services, legal) should use Retarus Enterprise Cloud Fax because it eliminates the compliance burden of managing on-premises fax infrastructure while maintaining audit trails for HIPAA, FERPA, and GDPR requirements. HITRUST e1 certification plus six geographically distributed data centers with redundancy means you're not gambling on a single vendor's infrastructure resilience, and the SAP and EHR integrations handle legacy systems without requiring expensive rewrites. Skip this if your organization needs modern API-first workflows as the primary interface; Retarus excels at retrofitting secure fax into existing enterprise stacks, not rearchitecting them.
Outlook add-in for end-to-end email encryption with recipient auth & revoke.
Cloud-based enterprise fax service for secure document transmission
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Common questions about comparing Beyond Encryption Mailock for Outlook vs Retarus Enterprise Cloud Fax for your email encryption needs.
Beyond Encryption Mailock for Outlook: Outlook add-in for end-to-end email encryption with recipient auth & revoke. built by Beyond Encryption. headquartered in United Kingdom. Core capabilities include End-to-end AES-256 email and attachment encryption, Recipient authentication via SMS, Q&A, or Unipass ID, One-click secure email composition from the Outlook ribbon..
Retarus Enterprise Cloud Fax: Cloud-based enterprise fax service for secure document transmission. built by Retarus. headquartered in Germany. Core capabilities include Email-to-fax transmission, API integration for fax operations, HITRUST e1 certified backend infrastructure..
Both serve the Email Encryption market but differ in approach, feature depth, and target audience.
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