Umbra

Private, end-to-end encrypted chat with a self-hosted backend and no third party in the middle of your conversations.

See downloads All platforms
End-to-end encrypted· Self-hosted· Windows, macOS, Linux & Android

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Windows

10/11, 64-bit
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macOS

Apple Silicon, 14.4+
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Linux

AppImage, x86_64
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Android

APK, arm64
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Windows and macOS builds are unsigned, so expect a SmartScreen warning on Windows, and on macOS right-click the app → Open the first time. The Android APK isn't on the Play Store, so allow installs from this source when prompted. The Linux build is a single AppImage: chmod +x it and run, no install needed.

Latest releases

v2.1.3latest Aug 23, 2026
  • Fixed message reactions not applying correctly after sending your own message.
  • The reaction picker now opens right next to the "+" button instead of in a disconnected spot.
  • Fixed the update progress bar rendering outside its own track while downloading.
  • No more duplicate notification popups while you're actively using the app.
  • Android: tapping a message notification now opens that conversation directly.
  • Android: you can now reply to a message right from the notification, without opening the app.
v2.1.2 Aug 23, 2026
  • Notifications are tappable again, tapping one now opens the app straight to your messages.
  • Fixed an Android issue where background notifications could silently stop arriving after the app had been closed for several hours.
  • Verified the in-app updater end to end against the real download server.
v2.1.1 Aug 23, 2026
  • Friend status now shows Active, Idle, or a real "Last seen" time (a few minutes ago, hours ago, or the date) instead of just a clock.
  • Redesigned message read receipts and the reaction picker for a cleaner look.
  • Chats now keep a private, encrypted copy of your recent messages on your device, so reopening a conversation is instant instead of waiting on the network every time.
  • Added loading indicators so a slow connection doesn't look like the app froze.
  • Icons now recolor correctly with every theme, no more invisible buttons on light backgrounds.
  • You can now update the app from within Settings itself.
  • General performance and stability improvements.