Best On-Premises Email Encryption Software of 2025

As a cloud-based, full-managed SaaS email encryption provider, Echoworx alone offers 8 ways to send protected mail, with support for 9 authentication options and up-to 28 languages – ensuring secure communication anywhere, on any device. Key features: • Multiple ways to send secure mail ( Web Portal, S/MIME, PGP, Secure PDF, Certificate Encryption, Secure Attachment (PDF, Office, ZIP), TLS with fallback) • More authentication options (Full OAuth Access, Self-Registration, SMS, Shared Secret Passphrase, SSO, System-Generated Verification Codes, Passwordless, and Multi-Factor Authentication (MFA) • Free full proof of concept trial (POC) • 24/7 expert support • End-to-end deployment • Recall and tracking options for secure mail • Extensive branding • Self Service Account Management

25% of the top 100 German companies with the highest turnover choose Zertificon's solutions. We make Enterprise Email Encryption effortless for secure communications with anyone, anywhere, with our Z1 SecureMail Gateway solution. Your entire organization encrypts and decrypts, just as well manages and verifies email signatures smoothly in the background. Z1 SecureMail Gateway requires very little maintenance. Furthermore, the browser-based admin interface does not call for any special skills. Keys are managed automatically, and security policies are centrally enforced. Integration into your cloud or on-premises email infrastructure is quick and straightforward. Your business and workflows are uninterrupted – no employee training is required, and recipients get a frictionless experience. Encryption is centrally customizable and proofed against human error with Z1 SecureMail Gateway. You can quickly establish and maintain compliance and the highest levels of security. You also own your encryption keys and get German-engineered data sovereignty with no backdoors.

SalaX Secure Mail provides a user-friendly and robust email encryption solution that seamlessly integrates with your current email services, safeguarding sensitive communications. It authenticates all users—both senders and receivers—through a variety of methods such as strong bank ID authentication, SMS and email OTPs, and password protection. The system enhances security with features like audit trails and detailed reporting options. It ensures that your communications are protected via end-to-end encryption, maintaining confidentiality from sender to recipient. Additionally, Secure Mail is compatible with multiple email security protocols, including DMARC, DKIM, SPF, and S/MIME-based encryption. You maintain control over your data with flexible deployment options available in both cloud and on-premises environments. The solution also provides numerous configuration options, including APIs and web interfaces, allowing for easy customization. You can classify sensitive data and modify security levels to align with your organizational policies. Moreover, it guarantees compliance with data privacy laws and regulations such as GDPR, delivering government-grade security measures for your peace of mind. By choosing Secure Mail, you enhance the overall security of your email communications significantly.