chooj VS signal

If you're willing to dive deep into self-hosting, the open source chat protocol Matrix.org has support for an in-development iMessage bridge. Once you get it to work, there's a Matrix.org client on KaiOS devices called Chooj (sideloading guide) made by Farooq that you can use to access the chat.

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

My end goal is to sideload a matrix chat app on to my Nokia 6300 4G US phone. Root would be nice but I'm not sure it can be done.

We do have a third-party client for Matrix, the protocol technology which Beeper is based on. Check it out here, and you can sideload this app by following this guide.

Some guy started one here, but needs more support to keep it going.

Hmm, the Matrix.org client Chooj currently works, but only with basic functions, like one-to-one texting and calling, group/channel texting, experimental notifications and so on. It's just that the dev hasn't got time to work more on this - see the support chat at #chooj:mozilla.org. https://github.com/farooqkz/chooj

Though I am not aware of any developments on an xmpp client, farooqkz is working on a matrix client which could then be bridged over to xmpp

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