Intermedia Email Encryption vs Z1 SecureMail Gateway: Side-by-Side Comparison (2026)

Intermedia Email Encryption: Cloud-based email encryption service using PKI, S/MIME & X.509 for orgs. built by Intermedia. Core capabilities include End-to-end encrypted email delivery using PKI, S/MIME, and X.509 certificates, Automatic background email scanning without additional software or plugins, Pre-built HIPAA templates for identifying Protected Health Information (PHI)..

Z1 SecureMail Gateway: Enterprise email encryption gateway supporting S/MIME, PGP, and digital signing. built by Zertificon Solutions GmbH. Core capabilities include S/MIME and PGP email encryption at the gateway level, Digital email signing for authenticity and integrity, Automated certificate management via CertMagic®..

Both serve the Email Encryption market but differ in approach, feature depth, and target audience.

Intermedia Email Encryption differentiates with End-to-end encrypted email delivery using PKI, S/MIME, and X.509 certificates, Automatic background email scanning without additional software or plugins, Pre-built HIPAA templates for identifying Protected Health Information (PHI). Z1 SecureMail Gateway differentiates with S/MIME and PGP email encryption at the gateway level, Digital email signing for authenticity and integrity, Automated certificate management via CertMagic®.

Intermedia Email Encryption is developed by Intermedia. Z1 SecureMail Gateway is developed by Zertificon Solutions GmbH. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Intermedia Email Encryption integrates with Microsoft 365, Intermedia Email Plus (Exchange Email). Z1 SecureMail Gateway integrates with Microsoft Azure, Microsoft 365, Google Cloud, Google Workspace, Z1 Global TrustPoint and 1 more. Check integration compatibility with your existing security stack before deciding.

Intermedia Email Encryption and Z1 SecureMail Gateway serve similar Email Encryption use cases: both are Email Encryption tools, both cover Encryption, Microsoft 365. Review the feature comparison above to determine which fits your requirements.