All your mail.
One inbox.
Connect Gmail, Outlook, and any IMAP mailbox, and read, search, and reply to all of them from one Apple-styled inbox — without ever switching apps.
Free forever · Self-hosted · No credit card
Connect
Add Gmail, Outlook, or any IMAP mailbox with an app password. Credentials are encrypted at rest — AES-256, never stored in plain text.
Unify
Every mailbox lands in one Apple-styled 3-pane inbox. Filter by mailbox, search across all of them, or read them as one unbroken stream.
Reply
Send from any connected mailbox over SMTP, right where you read it. No app-switching, no forgetting which inbox a thread lives in.
Why self-hosted
Your mail never leaves your server.
Most unified-inbox tools are someone else's cloud — your messages sit on their servers, under their retention policy. UseOneInbox runs on infrastructure you control. Credentials and tokens are encrypted with AES-256-GCM before they touch disk, and nothing is ever synced to a third party.
No vendor lock-in
It's your database, your server, your backups. Walk away any time with everything intact.
Encrypted at rest
App passwords and OAuth tokens are AES-256-GCM encrypted the moment they're saved.
Nothing shared
No analytics vendor, no ad network, no third party ever sees your inbox.
STOP SWITCHING TABS.
START READING MAIL.
Built to be trusted with your mail
Instant sync
A background worker holds an IMAP IDLE connection open per mailbox, so new mail lands immediately — no polling delay.
Every folder, found automatically
Inbox, Sent, Spam, Drafts, Trash — detected straight from your server's own settings, not guessed from folder names.
Encrypted at rest
App passwords and OAuth tokens are encrypted with AES-256-GCM before they ever touch disk.
Built to fit how you work
Resize the panels, drag mailboxes into your own order, zoom the whole workspace — every choice is remembered.
Local-only flags
Read, starred, archived, deleted — tracked locally, never written back to the mail server.
Your server, your data
Self-hosted. No inbox data ever leaves infrastructure you control.
Works with
Why is this free?
There's no hosting cost to us — you run UseOneInbox on your own server, so there's nothing to subsidize and nothing to sell. No trial, no seat limit, no credit card.