Kiteworks Secure Email is a commercial email encryption solution by Kiteworks. 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.
Secure email platform with encryption, DLP, and policy automation
Enterprise email encryption gateway supporting S/MIME, OpenPGP, and digital signing.
See more solutions in this category, or build a security stack from your picks.
Based on what each listing shows: deployment, company size, price and open source.
Z1 SecureMail Gateway fits if you are a startup.
Common questions when comparing Kiteworks Secure Email vs Z1 SecureMail Gateway for email encryption.
Kiteworks Secure Email: Secure email platform with encryption, DLP, and policy automation. Built by Kiteworks.
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.
Kiteworks Secure Email is made by Kiteworks. 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. Kiteworks Secure Email and Z1 SecureMail Gateway are both Email Encryption products, and both cover Encryption. Use the table above to see where features, deployment and company size fit differ.
No Email Encryption shortlist yet. This is the closest one.
Updated 2026-11-02
See the shortlist
