Signal Has Non-free Dependencies [Android]

Short Description: Signal requires proprietary software for Android
What is wrong with Signal?: Signal depends on proprietary software for its Android application. Therefore, is not “free software” as listed before.
Why does freedom matter?: Users cannot fully audit Signal’s Android application. This is particularly worrisome if it plans to replace modern SMS.
More Info:

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Is this info up-to-date?

  • Signal, a messaging app for mobile phones, has earned widespread deserved praise as a free software encrypted voice and text communication client, but currently has a proprietary dependency on Google libraries. Helping the project remove this dependency and operate the necessary infrastructure is a high priority.

((article linked is dated: Published on Jan 13, 2017 03:01 PM

they also fail to mention it on their signal page: (This entry (in part or in whole) was last reviewed on 19 April 2018.)

nor on their full listing pages:

but do refer to list on libreplanet, but no reference there:

looks like your first post, welcome to PTIO forums!

edit to add: sounds like Wire has similar issue still? (something is prevent fdroid inclusion :confused:

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Signal also released the APK for direct download which doesn’t rely on the google dependencies.

That article is from 2017 and things in tech move faster than that. It’s not a good idea to be so reactionary to old information without doing further research.

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Welcome to the forums! But yes, as @anon18111482 said, these statements don’t look up to date. Is it just me, or is everyone trying to find holes in every privacy tool that exists? I understand being paranoid, but there have to be at least a few that work…right?

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it appears the issue was signal relying on the gaggle cloud messaging (GCM aka firebase, this enables push notifies on android) which depends on gaggle Play Services and became a moot point with this commit enabling websocket use instead of gcm/firebase.

Desktop version also is independent of chrome/chromium dependency now (ref:

for android, also see April 2018:

Thanks in large part to moxie himself (but also to the F-Droid folks), we are much, much closer to a liberated signal than we were 4 years ago. The server side is still proprietary now publicly available under the AGPLv3. The client is also fully free software, optionally including the dependencies, so that’s really encouraging. I would recommend people reconsider their strong positions and see how it is, after all, possible to collaborate in a positive way. The Noise folks really showed us the way here, and we should probably be grateful to them as well…

if you know or suspect other non-free dependencies for Signal then please do include a credible reference for such!