# OpenText Core Email Encryption vs Z1 SecureMail Gateway: side-by-side comparison (2026) [OpenText Core Email Encryption](https://cybersectools.com/tools/opentext-core-email-encryption) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [OpenText Cybersecurity](https://cybersectools.com/companies/opentext-cybersecurity). [Z1 SecureMail Gateway](https://cybersectools.com/tools/zertificon-z1-solutions) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [Zertificon Solutions GmbH](https://cybersectools.com/companies/zertificon-solutions-gmbh). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | OpenText Core Email Encryption | Z1 SecureMail Gateway | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Encryption | Email Encryption | | Verified | No | Verified | | Deployment type | Cloud | Hybrid | | Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise, SMB, Startup | | Company | OpenText Cybersecurity | Zertificon Solutions GmbH | | Headquarters | – | – | ### Use cases and capabilities | | OpenText Core Email Encryption | Z1 SecureMail Gateway | |---|---|---| | TLS | Yes | Yes | | Encryption | – | Yes | | Gateway | – | Yes | | GDPR | – | Yes | | SMTP | – | Yes | | Microsoft 365 | – | Yes | | Supply Chain Security | – | Yes | | Healthcare | – | Yes | | DKIM | – | Yes | | DMARC | – | Yes | ### Core features **OpenText Core Email Encryption** 10 features listed. Sign in on the page to see them. **Z1 SecureMail Gateway** - Digital email signing for authenticity and integrity - Automated certificate management via CertMagic® - Inter-organizational encrypted email exchange via GlobalCrypt® - Cloud deployment support for Azure/M365 and Google Cloud/Workspace - Centralized server-side encryption transparent to end users - GDPR-compliant secure data exchange - EU NIS2 Directive compliance support - Secure large file transfer capability ### Integrations **OpenText Core Email Encryption** No integrations listed. **Z1 SecureMail Gateway** - Microsoft Azure - Microsoft 365 - Google Cloud - Google Workspace - Z1 Global TrustPoint - SwissSign ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [OpenText Core Email Encryption](https://cybersectools.com/tools/opentext-core-email-encryption) fits if you want a cloud product. - [Z1 SecureMail Gateway](https://cybersectools.com/tools/zertificon-z1-solutions) fits if you need both cloud and on-premises options and you are a startup. ## OpenText Core Email Encryption vs Z1 SecureMail Gateway FAQ Common questions when comparing OpenText Core Email Encryption vs Z1 SecureMail Gateway for email encryption. ### What is the difference between OpenText Core Email Encryption and Z1 SecureMail Gateway? **OpenText Core Email Encryption**: Cloud-based email encryption with automated DLP policies and delivery methods. Built by OpenText Cybersecurity. **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. ### Who makes OpenText Core Email Encryption and Z1 SecureMail Gateway? **OpenText Core Email Encryption** is made by OpenText Cybersecurity. **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. ### Is OpenText Core Email Encryption a good alternative to Z1 SecureMail Gateway? Often, yes. OpenText Core Email Encryption and Z1 SecureMail Gateway are both Email Encryption products, and both cover TLS. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [OpenText Core Email Encryption vs LuxSci](https://cybersectools.com/compare/luxsci-vs-opentext-core-email-encryption) - [OpenText Core Email Encryption vs SEPPmail Secure Email Gateway](https://cybersectools.com/compare/opentext-core-email-encryption-vs-seppmail-secure-email-gateway) - [OpenText Core Email Encryption vs Beyond Encryption Mailock Enterprise](https://cybersectools.com/compare/beyond-encryption-mailock-enterprise-vs-opentext-core-email-encryption) - [Z1 SecureMail Gateway vs LuxSci](https://cybersectools.com/compare/luxsci-vs-zertificon-z1-solutions) - [Z1 SecureMail Gateway vs SEPPmail Secure Email Gateway](https://cybersectools.com/compare/seppmail-secure-email-gateway-vs-zertificon-z1-solutions) - [Z1 SecureMail Gateway vs Beyond Encryption Mailock Enterprise](https://cybersectools.com/compare/beyond-encryption-mailock-enterprise-vs-zertificon-z1-solutions) ## Alternatives to each - [See all OpenText Core Email Encryption alternatives](https://cybersectools.com/alternatives/opentext-core-email-encryption) - [See all Z1 SecureMail Gateway alternatives](https://cybersectools.com/alternatives/zertificon-z1-solutions) --- Source: https://cybersectools.com/compare/opentext-core-email-encryption-vs-zertificon-z1-solutions For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/opentext-core-email-encryption.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on OpenText Core Email Encryption and Z1 SecureMail Gateway: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md