Sealed on your device
Every message gets its own key, sealed on the sender's device for each recipient. Subjects, bodies and attachment names never reach the server readable.
Encrypted email
ZeroMail
Mail only you and the people you write to can read.
End-to-end encrypted email for government, institutes and enterprise — on your own domain and your own servers. A familiar mail client up front; behind it, a server that stores sealed messages it cannot open.
Like every Zeromatics product:
Sealed against breach
Sealed against leak
Sealed against insider access
Privately hostable
What's inside
Real email. Sealed end to end.
A mail client people already know
Threads, folders, rich text, signatures, drafts, undo send, keyboard shortcuts and right-to-left writing — with nothing new to learn.
Attachments sealed as you attach
Files are encrypted the moment you add them, previewed in isolation from your keys, and blocked file types are disarmed on download.
Keys pinned, changes caught
A colleague's key is pinned on first contact. If it ever changes unexpectedly, sending stops until you check — so nobody slips in between.
Honest about the outside world
ZeroMail still talks to ordinary email. Mail to outside addresses is flagged before it leaves, and outside mail arrives clearly marked as not end-to-end encrypted.
Your domain, your servers
Verify your domain and ZeroMail generates the MX, SPF, DKIM and DMARC records for you. Run it in our cloud or on your own infrastructure; web, Windows and Android.
From the platform
And everything the platform gives every product.
Task management
Assign, track and complete work across teams — tasks, boards and deadlines come standard.
Private AI (RAG)
Answers grounded in your own documents, generated by small language models hosted on your infrastructure. Nothing leaves your control.
Give your organisation an inbox nobody else can open.
Watch your own data turn to ciphertext before it leaves the browser. The demo takes two minutes.