Tilix is described as «tiling terminal emulator which uses the VTE GTK+ 3 widget with the following features:» and is a terminal emulator in the os & utilities category. There are more than 50 alternatives to Tilix for a variety of platforms, including Linux, Mac, Windows, BSD and Electron / Atom Shell. The best alternative is PuTTY, which is both free and Open Source. Other great apps like Tilix are ConEmu, cmder, PowerShell and MobaXterm.Tilix alternatives are mainly Terminal Emulators but may also be Shells or SSH Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Tilix.
