Verdict: Yes
Yes. Signal publishes an official Signal Desktop for Linux alongside the Windows and Mac versions, and it works the same way.
Signal Desktop supports Mac, Windows and Linux. On Linux you either add Signal's own software source so it updates with the rest of your system, or download an AppImage, which is a single file you run without installing.
The catch is the same one Windows users already live with. Signal must be installed on your phone first, and the desktop app is linked to it. There is no way to use Signal on a computer without a phone account.
Nothing is lost by leaving Windows. Your account belongs to your phone number, and linking the new computer takes a minute. Older messages from the Windows desktop do not follow you across, because Signal keeps desktop history on the machine itself.
Setting up the software source route means typing commands in a terminal. If you would rather not, take the AppImage and save it somewhere you will find it, or install Signal from your system's app store if it offers it.
The same app from the same people, built for Linux. Link it to your phone and carry on.
Your files: Messages stay on your phone and on Signal's servers. Chat history already sitting on the Windows desktop does not transfer.
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