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StealthMail is a commercial email encryption tool by StealthMail. 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.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Mid-market and enterprise teams handling sensitive email workflows,healthcare, finance, legal,should evaluate StealthMail primarily for its recall and access control capabilities; most competitors encrypt content but can't revoke it post-delivery or prevent forwarding, and StealthMail does both. The hybrid deployment model and user-owned key management (ECC 512+) mean you're not trusting the vendor with your encryption material, which covers the PR.AA and PR.DS functions that matter most for regulated industries. Skip this if your threat model centers on detecting account compromise rather than preventing lateral movement of sensitive emails; StealthMail is a content-control tool, not a mailbox forensics platform.
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.
Enterprise email security via encrypted stealth-links, bypassing SMTP vulnerabilities.
Secure email gateway with automated DLP and zero-knowledge encryption
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Common questions about comparing StealthMail vs Zivver Secure Email Gateway for your email encryption needs.
StealthMail: Enterprise email security via encrypted stealth-links, bypassing SMTP vulnerabilities. built by StealthMail. headquartered in United States. Core capabilities include End-to-end email encryption using Stealth-Links instead of direct content transmission, User-owned encryption key management (ECC 512+ bit), Role-based access controls for managing user permissions..
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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