Paubox Email Encryption is a commercial email encryption solution by Paubox. Z1 SecureMail Gateway is a commercial email encryption solution by Zertificon Solutions GmbH. Features, integrations, deployment and the company behind each one, side by side.
HIPAA-compliant email encryption for Google Workspace and Microsoft 365
Enterprise email encryption gateway supporting S/MIME, OpenPGP, and digital signing.
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Based on what each listing shows: deployment, company size, price and open source.
Paubox Email Encryption fits if you want a cloud product.
Z1 SecureMail Gateway fits if you need both cloud and on-premises options.
Common questions when comparing Paubox Email Encryption vs Z1 SecureMail Gateway for email encryption.
Paubox Email Encryption: HIPAA-compliant email encryption for Google Workspace and Microsoft 365. Built by Paubox.
Z1 SecureMail Gateway: Enterprise email encryption gateway supporting S/MIME, OpenPGP, and digital signing. Built by Zertificon Solutions GmbH. Core capabilities include Digital email signing for authenticity and integrity, Automated certificate management via CertMagic®, Inter-organizational encrypted email exchange via GlobalCrypt®.
The table above shows where their features, integrations, deployment and company size fit differ.
Paubox Email Encryption is made by Paubox. Z1 SecureMail Gateway is made by Zertificon Solutions GmbH. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. Paubox Email Encryption and Z1 SecureMail Gateway are both Email Encryption products, and both cover Healthcare, TLS. Use the table above to see where features, deployment and company size fit differ.
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Updated 2026-11-02
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