[1/3] https://community.signalusers.org/t/how-deep-is-googles-ecosystem-embedded-in-signal/
https://gnu.org/philosophy/who-does-that-server-really-serve.html
https://gnu.org/philosophy/free-sw.html
The Signal client's own code is free/libre, but it farms out some activities to Google services. Depending on what Signal uses each of those services to do, using it might be SaaSS, which is as subjugating to the user as locally running a nonfree program. I don't use Signal, because it is almost