Usually when alternatives for messaging apps are recommended it’s Signal, Threema or Element but all of them still seem to have small inconveniences (Signal is American, Threema isn’t free and Element just seems too complicated).
Today I stumbled upon Delta Chat for the first time and it seems to be the ideal solution. It’s european, free, open-source, decentralised, usable on almost any device and privacy focused. But the fact that I’ve never heard about it before makes me hesitant.
Has anyone of you used it and can share their experience?
Edit: Here’s a link to their official website: https://delta.chat/en/
Speaking strictly from a cryptographic point:
Its main claim to fame (that it uses already existing open Standards) is also its biggest Weakness. These open Standards (E-Mail and PGP) are very old and outdated. Especially with PGP there are always new security bugs discovered and respected cybersecurity experts and cryptographers (as in: Mathematicians specializing in cryptography, not crypto-bros trying to sell cryptocurrencies) are actively advocating against it.
The absolute default recommendation always is Signal. It’s just the best, no discussion.
The next option would be something that is using signals encryption. That would be something like simplex messenger. But that one has problems with notifications and large groups.
My recommendation: Be pragmatic and just use Signal.