Without knowing your requirements, it's hard to make any real recommendations. Mumble, XMPP Jingle (groups possible) and Matrix all are options with audio (and some video) call support. Source: about 2 years ago

Take encrypted file transfer for instance. let's say I'm in an OMEMO chat session with you and I click my client's "send file" button. How do I know whether or not my file is going to be encrypted? there's enough wiggle room at the intersection of all of the relevant XEPs (not to mention client-defined behavior) that I'm not sure I could actually tell you for sure without looking at the source code for both clients. Source: over 2 years ago

Unnecessary for a chat protocol. In addition, if you want that you could just move to XMPP instead which does have XEP-0166: Jingle SIP-like session initialization. You could also use Mumble instead. Source: about 3 years ago

I would like to see examples of nocode apps with #4. I'd also like to know what language I should be using when searching and evaluating different tools. My challenge is that I go to all these sites: https://www.nocode.tech/category/app-builders and can't quickly understand how to approach #4 with any of these because they all seem to be for 1, 2, 3. nocode.tech nicely spells out their list for #3: " Customer... Source: about 1 year ago