# Kiteworks Secure Email vs SEPPmail Secure Email Gateway: side-by-side comparison (2026) [Kiteworks Secure Email](https://cybersectools.com/tools/kiteworks-secure-email) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [Kiteworks](https://cybersectools.com/companies/kiteworks). [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 | | Kiteworks Secure Email | SEPPmail Secure Email Gateway | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Encryption | Email Encryption | | Verified | No | No | | Deployment type | Hybrid | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Kiteworks | SEPPmail AG | | Headquarters | – | – | ### Use cases and capabilities | | Kiteworks Secure Email | 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 **Kiteworks Secure Email** 10 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 **Kiteworks Secure Email** 11 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. - [Kiteworks Secure Email](https://cybersectools.com/tools/kiteworks-secure-email) fits if you need both cloud and on-premises options. - [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway) fits if you need to run it on your own servers. ## Kiteworks Secure Email vs SEPPmail Secure Email Gateway FAQ Common questions when comparing Kiteworks Secure Email vs SEPPmail Secure Email Gateway for email encryption. ### What is the difference between Kiteworks Secure Email and SEPPmail Secure Email Gateway? **Kiteworks Secure Email**: Secure email platform with encryption, DLP, and policy automation, built by Kiteworks. **SEPPmail Secure Email Gateway**: Built by SEPPmail AG. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Kiteworks Secure Email and SEPPmail Secure Email Gateway? **Kiteworks Secure Email** is made by Kiteworks. **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 Kiteworks Secure Email a good alternative to SEPPmail Secure Email Gateway? Often, yes. Kiteworks Secure Email 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 - [Kiteworks Secure Email vs Z1 SecureMail Gateway](https://cybersectools.com/compare/kiteworks-secure-email-vs-zertificon-z1-solutions) - [Kiteworks Secure Email vs LuxSci](https://cybersectools.com/compare/kiteworks-secure-email-vs-luxsci) - [Kiteworks Secure Email vs RPost RMail Email Encryption](https://cybersectools.com/compare/kiteworks-secure-email-vs-rpost-rmail-email-encryption) - [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 RPost RMail Email Encryption](https://cybersectools.com/compare/rpost-rmail-email-encryption-vs-seppmail-secure-email-gateway) ## Alternatives to each - [See all Kiteworks Secure Email alternatives](https://cybersectools.com/alternatives/kiteworks-secure-email) - [See all SEPPmail Secure Email Gateway alternatives](https://cybersectools.com/alternatives/seppmail-secure-email-gateway) --- Source: https://cybersectools.com/compare/kiteworks-secure-email-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/kiteworks-secure-email.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Kiteworks Secure Email 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