TeamViewer is free for personal use

The 11 best alternatives to TeamViewer

The open source software UltraVNC is an excellent alternative to TeamViewer for Windows users, which is developed and sold under the free GPLv2 license. The software bundle consisting of viewer (client) and server (remote PC) supports you in establishing and managing remote connections and uses the VNC principle for this purpose (V.irtual Network C.omputing) based on the RFB protocol (R.emote F.ramebuffer). Remote connections that have been established with the help of these two components enable, among other things, the uncomplicated transfer of files, the exchange of text-based messages and different authentication methods (8-digit DES password, MS Logon I and II).

Both the client and the server components of the free remote software are convincing extensive configuration options. These give experts a huge amount of leeway. However, in return, they make it noticeably more difficult for less experienced users to use UltraVNC, which is also due to the old-fashioned menu interface. Since the signals from the server application can be received and displayed by any number of viewers, the TeamViewer alternative is also suitable for training or presentations. Via the toolbar or in the server module, you can set that only individual desktop windows are transmitted in order to direct the participants' focus to the essential information.