The best open source alternative to Chrome Remote Desktop is Remmina. If that doesn't suit you, our users have ranked more than 50 alternatives to Chrome Remote Desktop and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Chrome Remote Desktop are mRemoteNG (Free, Open Source), UltraVNC (Free, Open Source), TightVNC (Free Personal, Open Source) and X2Go (Free, Open Source).
Remmina is a remote desktop client written in GTK+. Remmina primarily targets system administrators and travelers that need to work with computers remotely in front of either large monitors or tiny netbooks.
UltraVNC is easy to use and free software that can display the screen of another computer (via the Internet or a local network) on your own screen. The program allows you to use your mouse and keyboard to control the other computer remotely.
UltraVNC vs Chrome Remote Desktop opinions
pros, cons and recent comments
It's only Visual remote screen, but can't control the remote host
TightVNC is a free remote desktop application. With TightVNC, you can see the desktop of a remote machine and control it with your local mouse and keyboard, just like you would do it sitting in the front of that computer.
TigerVNC is an advanced VNC implementation. It is based on the fourth generation of VNC. TigerVNC also includes features from the TightVNC and TurboVNC projects. This includes accelerated JPEG compression. TigerVNC supports the latest X.Org X server.
Dayon! is a user friendly, open-source, cross-platform solution, that allows controlling of remote computers.
It can be used as free alternative to various commercial remote desktop and remote assistance products.
xrdp provides a graphical login to remote machines using RDP (Microsoft Remote Desktop Protocol). xrdp accepts connections from variety of RDP clients: FreeRDP, rdesktop, NeutrinoRDP and Microsoft Remote Desktop Client (for Windows, macOS, iOS and Android).