DigiCert Secure Email (S/MIME) Certs is a commercial email encryption tool by DigiCert. 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:
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.
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.
S/MIME certificates for end-to-end email encryption and signing.
Secure email gateway with automated DLP and zero-knowledge encryption
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Common questions about comparing DigiCert Secure Email (S/MIME) Certs vs Zivver Secure Email Gateway for your email encryption needs.
DigiCert Secure Email (S/MIME) Certs: S/MIME certificates for end-to-end email encryption and signing. built by DigiCert. headquartered in United States. Core capabilities include End-to-end email encryption using S/MIME, Digital message signing with public/private key pairs, Automated certificate request and delivery..
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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