SipherMailEncrypted email for privacy
End-to-end encrypted email with zero-knowledge architecture, optional AI assistance, and custom domains for individuals and businesses. Operated by Trisun.
Secure email without the compromise
SipherMail combines enterprise-grade encryption with a modern inbox experience — including threaded conversations, keyboard shortcuts, and optional AI tools you control.
End-to-end encryption
SipherLock™ encryption keeps messages private. We cannot read your mailbox contents.
AI email assistant
Optional AI for compose, smart replies, summaries, and inbox organization.
Custom domains
Use your own domain for professional email. Business plans support multiple domains and shared inboxes.
Cross-platform apps
Access SipherMail on the web, iOS, and Android with secure sync across devices.
Zero-knowledge architecture
Built so your private content stays yours — no advertising, no data mining of mailbox content.
Built for reliability
Professional sending controls and infrastructure so teams can communicate without compromise.
Ready to take back your inbox?
Explore SipherMail on its product site to get started.
Go to siphermail.com