# INKY Email Encryption vs Z1 SecureMail Gateway: side-by-side comparison (2026)

[INKY Email Encryption](https://cybersectools.com/tools/inky-email-encryption) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [INKY Technology Corporation](https://cybersectools.com/companies/inky-technology-corporation). [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

| | INKY 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 | INKY Technology Corporation | Zertificon Solutions GmbH |
| Headquarters | – | – |

### Use cases and capabilities

| | INKY Email Encryption | Z1 SecureMail Gateway |
|---|---|---|
| Encryption | Yes | Yes |
| Microsoft 365 | Yes | Yes |
| Multi Tenancy | Yes | – |
| Gateway | – | Yes |
| GDPR | – | Yes |
| SMTP | – | Yes |
| Supply Chain Security | – | Yes |
| Healthcare | – | Yes |
| DKIM | – | Yes |
| TLS | – | Yes |
| DMARC | – | Yes |

### Core features

**INKY Email Encryption**

5 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

**INKY Email Encryption**

3 integrations listed. Sign in on the page to see them.

**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.

- [INKY Email Encryption](https://cybersectools.com/tools/inky-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.

## INKY Email Encryption vs Z1 SecureMail Gateway FAQ

Common questions when comparing INKY Email Encryption vs Z1 SecureMail Gateway for email encryption.

### What is the difference between INKY Email Encryption and Z1 SecureMail Gateway?

**INKY Email Encryption**: Email encryption solution for securing sensitive data in email communications. Built by INKY Technology Corporation.

**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 INKY Email Encryption and Z1 SecureMail Gateway?

**INKY Email Encryption** is made by INKY Technology Corporation. **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 INKY Email Encryption a good alternative to Z1 SecureMail Gateway?

Often, yes. INKY Email Encryption and Z1 SecureMail Gateway are both Email Encryption products, and both cover Encryption, Microsoft 365. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [INKY Email Encryption vs LuxSci](https://cybersectools.com/compare/inky-email-encryption-vs-luxsci)
- [INKY Email Encryption vs SEPPmail Secure Email Gateway](https://cybersectools.com/compare/inky-email-encryption-vs-seppmail-secure-email-gateway)
- [INKY Email Encryption vs Beyond Encryption Mailock Enterprise](https://cybersectools.com/compare/beyond-encryption-mailock-enterprise-vs-inky-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 INKY Email Encryption alternatives](https://cybersectools.com/alternatives/inky-email-encryption)
- [See all Z1 SecureMail Gateway alternatives](https://cybersectools.com/alternatives/zertificon-z1-solutions)

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Source: https://cybersectools.com/compare/inky-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/inky-email-encryption.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on INKY 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