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

Paubox Email Encryption: HIPAA-compliant email encryption for Google Workspace and Microsoft 365. built by Paubox. Core capabilities include Automatic encryption of every outbound email by default, 128-bit or 256-bit AES encryption, Transport Layer Security (TLS) 1.2 or higher for message delivery..

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.

Paubox Email Encryption differentiates with Automatic encryption of every outbound email by default, 128-bit or 256-bit AES encryption, Transport Layer Security (TLS) 1.2 or higher for message delivery. 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®.

Paubox Email Encryption is developed by Paubox. 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.

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