Briar Mailbox

Briar Mailbox is an open-source (AGPL-3.0-or-later) Android app. The APK we host is 51 MB, it needs Android 4.3 or newer, and it declares 8 permissions.

The file on this page is Briar Mailbox 1.0.9, 51.26 MB, and it installs on Android 4.3 and newer.

We compared the signing certificate of this build with the certificate recorded the first time org.briarproject.mailbox entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.

The manifest inside the APK declares 8 permissions, none of which cover contacts, location, SMS, the camera or the microphone.

Its licence is AGPL-3.0-or-later. We took this build from F-Droid, and the source for this exact version is linked below.

The most recent release upstream is from Aug 12, 2024, over 2 years ago. It still installs; it is simply not being updated.

We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.

Download APK · 51.26 MB

Version: 1.0.9
Size: 51.26 MB
Requires Android: API 18
Package: org.briarproject.mailbox
Signature checked on: Sep 22, 2026
Where this file came from: F-Droid
Licence: AGPL-3.0-or-later
Source code: Source for this version

File SHA-256: 6251ab38cf7c79b3b8e970686e39e0a41078d6a0ecbce32000f3d4d0b5596245

Signing certificate (SHA-256): acc4dba48bea4c14df80361a68e5607c0bdbe4ddfafff60cf5ca6c09190f6b83

We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.