https://delta.chat/en/help#e2ee
I gave it another try last week
- the onboarding automatically creates a username/password on the server you selected, more details here: https://chaos.social/@delta/115479392746850836
- E2EE using openpgp
- fast and light on resources
It’s still in development, it’s not a fully fledged replacement for Matrix yet, but I could see it replace Signal at some point.
For a list of servers: https://chatmail.at/relays


I used it years ago and it worked quite well even back then. If you just need a messenger then its not bad at all imo. I dont know how it scales when running a server for 10000+ users (every message is a new email so the load is probably a lot higher than for a normal email server), but its probably fine.
The main reason why i dont use it over matrix is the very mature VOIP stack that Element/Matrix is using. I basically completely replaced classic phone calling and other video conferencing stuff with matrix.
I just noticed reading their forum that they plan to include calls support in the next release https://support.delta.chat/t/help-testing-upcoming-delta-chat-release-with-calls/4220
1:1 calls are pretty straightforward to implement with webrtc. Nice to see they are doing it.
Interesting, I don’t use Matrix for voice call, maybe I should give it a try
So far only Element Web/Desktop and ElementX have implemented the current gen call system. It also needs to be supported server side so it only works if you are on a homeserver that has set up element-call. (Many have at this point, but far from all)
In Element X its the only available call system, in the desktop version you need to click on the video/camera icon and select “Element Call” to use it.
If you just wanna try it out standalone (the client just embeds this same UI) you can do so here. https://call.element.io/
This systems is super smart and can distribute the load across multiple homeservers when you have large calls with like 100+ participants.
Very interesting, thanks!
If you wanna see if a server supports it just put in your servers URL into this handy matrix server tester.
If the server has something related to “livekit” in the .well-known section then its most likely supported.
https://federationtester.mtrnord.blog/?serverName=matrix.org#server-wellknown