New senders are screened. Your Imbox is only people you've approved. Newsletters live in The Feed. Receipts go to Paper Trail. You host it.
The app talks to your Kurir server. Buying it funds the rest.
MCP
Search, triage, screen senders, and change your settings from Claude. Your mail stays on your server. Sending and other destructive actions ask for a confirmation first.
Add the endpoint as a custom connector in Claude.
Sign in with the same passkey you already use.
Approve access. Revoke it later under Settings.
Custom connector
https://<your-domain>/mcp
Claude.ai, Claude Desktop, and Claude Code. Revoke under Settings → Connected apps.
Screener blocks unknown senders. The Feed collects newsletters. Paper Trail files receipts. Search finds everything. Everything in its right place.
New senders don't reach your inbox. You decide who gets in, who gets filed, and who gets blocked.
Only mail from senders you've approved. The important stuff, and nothing else.
Newsletters and subscriptions in a browsable feed. Browse when you want, not when they arrive.
Receipts, confirmations, and notifications. Kept neatly separate so they're there when you need them.
A full calendar beside your mail - week, day, and month views, synced with the calendars you already have, and RSVP to invitations right from the inbox.
Native iPhone and Mac apps on the App Store - paid, smoother, and what funds the project - plus a free PWA.
PostgreSQL-powered search across every email. Find anything, instantly.
Every attachment across your mail in one place, newest first. Filter by type, search by name, and grab what you need.
Snooze messages until later. Set follow-up reminders so nothing falls through the cracks.
Stack the messages you owe a response, then work through them one at a time in a focused mode — nothing else competing for your attention.
Full keyboard shortcuts, command palette, and vim-style navigation. Never touch the mouse.
Write emails in Markdown. Schedule sends. Auto-save drafts. Send from multiple accounts.
Messages grouped into threads — see the full conversation in one view and reply inline. Un-thread noisy senders when you'd rather take them one message at a time.
Light, dark, or match your system. Easy on the eyes at any hour.
Tracking pixels stripped and remote images proxied. Senders can't see when, where, or whether you opened their mail.
Runs on your hardware. Your data stays on your server. No third parties, ever.
The server, the web app, and the PWA are free and open source. The native Mac and iPhone apps are the one thing that costs money - buying them is what funds the rest.
A real Mac app. Same Swift as the iPhone, built for a keyboard and a wide window. Offline-first. Lists and threads read from a local store, and actions queue when you're offline.
Search, shortcuts, a full native calendar, and the sidebar you already know. Paid, like the iPhone app, and what funds the rest of Kurir.
Real Swift, not a wrapped web page. Offline-first — every list and thread reads instantly from a local store, and actions queue up when you're off the grid. A native calendar with RSVP built in, and push notifications the moment mail lands in your Imbox.
The native apps are the only part of Kurir you can pay for, and you never have to. Think of them as the project's tip jar - with a really nice app attached.
Every feature is here. Screener, Imbox, Feed, Paper Trail, search, compose - the same Kurir, installed from your own server. No App Store, no extra account. Full-screen, with push on iOS 16.4+ and Android.
It's just not as smooth as the native iPhone app. The Swift client is offline-first and faster. The PWA is free, like everything else on your server. Install guide.
If you want to customize Kurir for your own use, or just see how it looks from the inside out, you can download it and run it yourself. Have a great idea? Submit a PR to contribute and make it better. Our software license allows for flexible use with few restrictions.
Kurir is free and open source. If it's useful to you and you'd like to help keep it going, consider supporting the project financially. Every bit helps cover hosting, development time, and infrastructure.
Monthly or one-time. Directly supports development.
A real Swift client for your Imbox. Pay once - it funds development. The Mac app is out too.
Don't want to self-host? We'll run it for you.
Need help? Check out the documentation.
$ curl -fsSL https://raw.githubusercontent.com/cfarvidson/kurir-server/main/install.sh | sudo sh