# Galaxkey Email Encryption Software vs SEPPmail Secure Email Gateway: side-by-side comparison (2026) [Galaxkey Email Encryption Software](https://cybersectools.com/tools/galaxkey-email-encryption-software) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [GALAXKEY](https://cybersectools.com/companies/galaxkey). [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [SEPPmail AG](https://cybersectools.com/companies/seppmail-ag). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | Galaxkey Email Encryption Software | SEPPmail Secure Email Gateway | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Encryption | Email Encryption | | Verified | No | No | | Deployment type | Hybrid | On-Premises | | Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | GALAXKEY | SEPPmail AG | | Headquarters | – | – | ### Use cases and capabilities | | Galaxkey Email Encryption Software | SEPPmail Secure Email Gateway | |---|---|---| | Encryption | Yes | Yes | | Gateway | – | Yes | | SMTP | – | Yes | | GDPR | – | Yes | | DKIM | – | Yes | | SPF | – | Yes | | DMARC | – | Yes | | TLS | – | Yes | | PII | – | Yes | | Security Compliance Training | – | Yes | ### Core features **Galaxkey Email Encryption Software** 6 features listed. Sign in on the page to see them. **SEPPmail Secure Email Gateway** 6 features listed. Sign in on the page to see them. ### Integrations **Galaxkey Email Encryption Software** 3 integrations listed. Sign in on the page to see them. **SEPPmail Secure Email Gateway** 12 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Galaxkey Email Encryption Software](https://cybersectools.com/tools/galaxkey-email-encryption-software) fits if you need both cloud and on-premises options and you are a startup. - [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway) fits if you need to run it on your own servers. ## Galaxkey Email Encryption Software vs SEPPmail Secure Email Gateway FAQ Common questions when comparing Galaxkey Email Encryption Software vs SEPPmail Secure Email Gateway for email encryption. ### What is the difference between Galaxkey Email Encryption Software and SEPPmail Secure Email Gateway? **Galaxkey Email Encryption Software**: Email encryption software using FIPS 140-2 compliant modules and RSA keys. Built by GALAXKEY. **SEPPmail Secure Email Gateway**: Built by SEPPmail AG. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Galaxkey Email Encryption Software and SEPPmail Secure Email Gateway? **Galaxkey Email Encryption Software** is made by GALAXKEY. **SEPPmail Secure Email Gateway** is made by SEPPmail AG. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Galaxkey Email Encryption Software a good alternative to SEPPmail Secure Email Gateway? Often, yes. Galaxkey Email Encryption Software and SEPPmail Secure Email Gateway are both Email Encryption products, and both cover Encryption. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Galaxkey Email Encryption Software vs Z1 SecureMail Gateway](https://cybersectools.com/compare/galaxkey-email-encryption-software-vs-zertificon-z1-solutions) - [Galaxkey Email Encryption Software vs LuxSci](https://cybersectools.com/compare/galaxkey-email-encryption-software-vs-luxsci) - [Galaxkey Email Encryption Software vs TitanHQ EncryptTitan](https://cybersectools.com/compare/galaxkey-email-encryption-software-vs-titanhq-encrypttitan) - [SEPPmail Secure Email Gateway vs Z1 SecureMail Gateway](https://cybersectools.com/compare/seppmail-secure-email-gateway-vs-zertificon-z1-solutions) - [SEPPmail Secure Email Gateway vs LuxSci](https://cybersectools.com/compare/luxsci-vs-seppmail-secure-email-gateway) - [SEPPmail Secure Email Gateway vs TitanHQ EncryptTitan](https://cybersectools.com/compare/seppmail-secure-email-gateway-vs-titanhq-encrypttitan) ## Alternatives to each - [See all Galaxkey Email Encryption Software alternatives](https://cybersectools.com/alternatives/galaxkey-email-encryption-software) - [See all SEPPmail Secure Email Gateway alternatives](https://cybersectools.com/alternatives/seppmail-secure-email-gateway) --- Source: https://cybersectools.com/compare/galaxkey-email-encryption-software-vs-seppmail-secure-email-gateway For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/galaxkey-email-encryption-software.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Galaxkey Email Encryption Software and SEPPmail Secure Email 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