The response of Matrix to Moxie (Signal maintainer). And why a decentralized version is needed on the internet.

Alternatives: Matrix, Briar, Jitsi, XMPP

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Signal was again ordered by a judge to provide user information. But since everything is encrypted from end to end, here is the only information they were able to provide:

• date/time of account creation.
• date/time of the last connection to the service.
  And that's it.
  That's it.
  It's probably not perfect software, but use Signal.