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Beyond Encryption Mailock for Outlook is a commercial email encryption tool by Beyond Encryption. Zivver Secure Email Gateway is a commercial email encryption tool by Zivver. 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.
Mid-market and enterprise security teams drowning in email DLP tuning will see immediate value in Zivver Secure Email Gateway because it detects sensitive data without requiring users to classify it, reducing the false-positive fatigue that kills adoption. The tool handles GDPR, HIPAA, and DORA compliance out of the box while integrating directly into Microsoft 365 and Gmail without ripping out existing infrastructure. Skip this if your organization needs advanced threat detection on inbound mail or is heavily invested in on-premises Exchange; Zivver's strength is automated outbound protection, not inbound scanning.
Outlook add-in for end-to-end email encryption with recipient auth & revoke.
Secure email gateway with automated DLP and zero-knowledge encryption
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Common questions about comparing Beyond Encryption Mailock for Outlook vs Zivver Secure Email Gateway 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..
Zivver Secure Email Gateway: Secure email gateway with automated DLP and zero-knowledge encryption. built by Zivver. headquartered in Netherlands. Core capabilities include Automated sensitive data detection in outbound emails, Zero-knowledge encryption for all outgoing emails, Rule-based security policy enforcement..
Both serve the Email Encryption market but differ in approach, feature depth, and target audience.
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