zlacker

No, there isn't any, because outside Telegram and SMS, none of those apps really support any APIs or 3rd party clients.

Signal team is also actively hostile to any 3rd party client usage of their service.

And that's always cheered on this website - just remember the RCS topics where people were making fun of attempts to add some basic standardisation to this mess.

>>izacus+(OP)
> Signal team is also actively hostile to any 3rd party client usage of their service.

"actively" is a big word, there are several 3rd party clients and no big push to make them stop. They don't want widespread 3rd party clients though.