matrix-bifrost VS signal

tbh Matrix was pretty green 5 years ago, so you probably didn't miss much. Thanks for considering a slidge-matrix bridge. On the Matrix side, we already have https://github.com/matrix-org/matrix-bifrost as our main Matrix<->XMPP bridge, but it could definitely be better, and the more interop between open protocols the better \o/ :)

Unfortunately XMPP<->Matrix end-to-end encryption is a contradiction in terms. You have to speak the same protocol from end-to-end, otherwise you'd have to break the end-to-end encryption to translate from one protocol to the other. The closest you could get would be to run the Matrix<->XMPP bridge clientside alongside your Matrix client... but at that point you might almost as well be running a multihead messenger that speaks both Matrix & XMPP.

In terms of adding Matrix to MUCs; i believe we're working on it in Bifrost, which is in active albeit slightly sporadic dev: https://github.com/matrix-org/matrix-bifrost.

Matrix itself looks like it may be able to serve xmpp via this bridge

Yes, there is: https://github.com/matrix-org/matrix-bifrost/wiki/Address-sy...

On-device bridging works like this https://blog.beeper.com/p/how-beeper-mini-works. We'll put together a full technical deep dive for the real launch, this is just an open beta. Our signal bridge code is open source: https://github.com/mautrix/signal

You don't have to use our hosted bridges, we've made it ridiculously easy to self host: https://github.com/beeper/bridge-manager

Exactly yeah, I used this bridge with this playbook

I personally recommend going with a Matrix client and building a bridge to your Signal account.

OWS has historically been hostile to third party implementations outside of their clients. There are multiple unofficial options but the only one I've been looking at is the bridge with matrix, though setting up a matrix server just for this is likely overkill.

However, looking at the Matrix docs for the mautrix-signal bridge, it seems to be open-source and end-to-end encrypted. You'll have to look through the source code to figure out how they did that, I guess, because I couldn't find any details.

Once you have the home server set up and configured (not covered here because it's a process), clone the bridge repo (for instance mautrix-signal and follow the instructions.

the signal matrix bridge currently listed on matrix.org (https://github.com/tulir/mautrix-signal) uses signald