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Re:Worried About the Privacy of Your Messages? Download Signal by nickik on Thursday December 08, 2016 @11:35AM (#13131504)
Matrix has the crypto and the federation. But of course its still not hiding metadata.

The Signal Server is open source, as far as I know.

Re:Worried About the Privacy of Your Messages? Download Signal by joecool1029 on Thursday December 08, 2016 @12:55PM (#13132366)
> The Signal Server is open source, as far as I know.

Yes, except for the voice call component.