HTidal

HTidal is an unofficial Tidal client for Linux which is completely opensource. It's really close to the official Tidal application, but with a few differences:

• It's not modern looking (It makes it more efficient but also less pleasant)
• It supports Linux (The web app is a bit picky with the browser support, reduces audio quality and it doesn't support offline mode and it's also less convenient, so I don't count it)
• It's opensource (which also means that it can have extra functions based on the developer's / modifier's needs)
• It's a native program for Linux (it uses GTK, Python and your local keyring)
• It's extremely lightweight (compared to official solutions)
• It respects your privacy (it does what it should:  streams your music from Tidal, nothing more)
• it's reliable (even though it's in beta, mainly because of it's simplicity it has less glitches than the official app on windows)