zlacker

>>pera+(OP)
Signal exposes the user's phone number, better alternative is to use burner phones or Telegram.

>>kome+uq
Or an open standard like Matrix

>>Evidlo+bs
First time hearing about Matrix standard. But in case the clients are maintained by some individuals - why should we trust them that there are no backdoors in their compiled binaries? Seems like a nice project! But probably it will take it's small niche, probably for now it is not wide spreaded, haven't heard any noise about the standard.

>>0x49d1+1K
The signal server has 10 maintainers out of which 5 are signal employees.

Matrix is 100% open source, has a larger community maintaining it and is federated.

If you're worried about backdoors then you should have more eyes on the code.