Best Secure Email Products in 2026

Security-first transactional email: SMTP relay and REST API for password resets, receipts, 2FA and notifications. 100% owned infrastructure, strict sender vetting, human deliverability, ISO 27001/27701/HIPAA, native SendGrid/Mailgun compatibility.

Key Omnivery features:

API API Infrastructure Compliance

Visit website paid Sponsored

Secure email with absolutely no compromises. Get your free encrypted email account today.

Key ProtonMail features:

End-to-End Encryption Zero Access to User Data Swiss Privacy Laws Open Source

freemium €5 / Monthly (user - 5 GB)

mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.

Key mailbox.org features:

Privacy Focused No Ads Feature-Rich Affordable Pricing

Cloud Native DMARC.

Key EasyDMARC features:

AI-powered DMARC Report Analyser DMARC, SPF, DKIM cloud management solutions Email source reputation monitoring

Open Source freemium $35.99 / Monthly (2 domains, 100K emails, 3 month data history, 1 user)

Secure, private email built with open source components.

Key YMOZ features:

Easy to Set-up and use IMAP ActiveSync Calendar sync

Open Source

Get your encrypted mailbox for free.

Key Tutanota features:

Privacy-Focused Open Source GDPR Compliant Ad-Free Experience

Open Source

Secure business email for automated security and compliance. Send sensitive information and transfer files hassle-free.

Key Zivver features:

Easy Secure Email Communication Data Leak Prevention Regulatory Compliance Large File Transfer

Agari is a data-driven security solution powering real-time cyber threat detection for companies & their customers.

Key Agari features:

Email Security Brand Protection Threat Intelligence User-Friendly Interface

OnionMail the TOR encrypted Mail Server.

Email response automation and management.

Key eGain Mail features:

Automation Automation Analytics and Reporting Workflow Management

paid Free Trial

Security-first transactional email: SMTP relay and REST API for password resets, receipts, 2FA and notifications. 100% owned infrastructure, strict sender vetting, human deliverability, ISO 27001/27701/HIPAA, native SendGrid/Mailgun compatibility.

Key Omnivery features:

API API Infrastructure Compliance

Visit website paid

GPGMail is an open source plugin for Apple Mail.

Key GPGMail features:

Enhanced Security Open Source Integration with Apple Mail Free to Use

ShazzleMail is the first privacy-protective and surveillance-resistant secure email service.

Key Shazzlemail features:

Privacy-focused Direct peer-to-peer email End-to-end encryption User control

Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day...

Key Kolab Now features:

Privacy-focused Open Source Comprehensive Features No Ads