this post was submitted on 14 Feb 2025
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XMPP is the answer. Alternatively, there is Session. I have never understood the obsession with Matrix (which allegedly had some Israeli involvement in its creation).
XMPP is cool but Delta Chat is the good shit
Can you send large-ish (~5Gb) files over Delta Chat? That was one of my favorite things about self hosting matrix was to be able to dump raw clips from my phone into a chat.
No but XMPP is fine for that. I use both of them. DeltaChat has a way to send larger files in smaller chunks and store them in a persistent cloud drive type UI through the webapps it introduces.
The webapps are really nice and actually work a lot better than all of the Matrix integrations. They may look rustic but I actually use them for almost all of my notes and todo lists now lol. It has a very valuable place in my stack because of how I use it to sync notes and files between devices.
I should be a little more measured in my hyping of DeltaChat lol it's just surprisingly good for how in-development it is already, soon to add location sharing and video chats, they're in testing currently.
Multiple devices is a little quirky as you either need to make a new account (instantaneously) to communicaye with the same contacts and yourself, use the backup (doesn't have a password), or do the transfer thing where you need both devices on the same wifi network.
Again I have tried to stress test Matrix and I did hang onto it for a while to do exactly what you're describing but I just moved on because of the issues I mentioned and losing old messages even while doing everything right. It's some shit with device key storage I think, shit can get fucked up. Maybe a more competent person with a tech job/unemployment would do better than me haha
Also worth mentioning that Matrix does not encrypt the images while they're on the home server itself and has a bunch of creepy issues like that. Homeservers have some weird privileges and attacks they can pull off on rooms, although in edge cases like when a room is totally orphaned and loses all participants.
Delta is notable for how you can delete all of your stuff off of the server after receiving it. I choose device based storage + higher security + the backup option over Matrix's false promise of preserving old messages.
Matrix clients were insanely buggy and would still show rooms after my friends and I left them and stuff like that?? Augh. Also Delta lets you set a background image for impeccable atmosphere. Webapps open in new windows on desktop so it's nice to throw stuff in them on mobile and come back when you're ready to work at a full desk.