and the thing is: Telegram having a proprietary server feels more opensource and open to 3rd party clients and developers (ex. bots, mini-apps etc) than Signal, Signal's issue tracker has a bot auto-closing stale issues and several people are completely ignored, never receive a reply

I highly recommend you to give a try to https://arcanechat.me/ (I am the developer) it is heavily inspired by Telegram, if you want to test it you can join this community group: https://i.delta.chat/#6CBFF8FFD505C0FDEA20A66674F2916EA8FBEE99=&a=invitebot%40nine.testrun.org&g=ArcaneChat+Community&x=3KvvQZfzU4t-9u5s0PF3USGp&i=AQKH9_8x0R0&s=dbGW9xOhRQX

I like SIP and XMPP, but in practice I don't have any contacts to use it and the apps are lacking a bit compared to ArcaneChat/DeltaChat, besides the problem of losing groups because the XMPP server went down etc. there are some downsides but yes, if I was not satisfied with ArcaneChat I would use XMPP and SIP, or anything that is open source, decentralized and doesn't require a phone number

Nice! 🤩

1. if they leaked something you wouldn't know because US government law doesn't allow them to disclose if they requested data.
2. uses AWS servers that also the gov could ask for access to Amazon directly without even talking to Signal, being centralized and depending on AWS infra is also a weakness.
3. needing phone numbers to register, often tied to passport and it is super easy to get your whole network when compromising 1 device
4. all centralized services start nice, attracting users, once they have you, and money starts being a problem.... meet: enshitification

I moved my whole family since years to Delta Chat, eventually started contributing to the project and even created my own fork that is what my family is using, see: https://lemmy.ml/post/26007254

Or the classic "guys I am leaving WhatsApp, moved my whole family to Signal, another centralized US-based silo that requires phone numbers and runs on AWS, CloudFlare, etc."

Sure thing! ArcaneChat is decentralized: https://github.com/ArcaneChat/server

I bet it is using more resources than my +1400 people server 😅 but yeah for 10 people it is probably OK with matrix as long as they don't join some crazy federated groups etc

Yes

If you do, you can join this group: https://i.delta.chat/#6CBFF8FFD505C0FDEA20A66674F2916EA8FBEE99=&a=invitebot%40nine.testrun.org&g=ArcaneChat+Community&x=3KvvQZfzU4t-9u5s0PF3USGp&i=AQKH9_8x0R0&s=dbGW9xOhRQX

btw, Matrix server requirements are much higher, and the client apps are less user-friendly

For example, arcanechat.me server has more than 1400 users and the server is using around 800MB of RAM, CPU is idle most of the time or really low usage, less than 3GB of disk (including whole Debian operative system etc)

Yes and no, it allows to login without providing any data or using any email account, in that case a random/anonymous account is created in arcanechat.me which is an email internally but optimized for chatting with similar speeds of other chatting platforms

Also with arcanechat.me server unencrypted messages are not allowed at all so you can be sure you don't accidentally leak any message, also all messages are removed from the server immediately after downloading them (or after a few days when using multiple devices)