NTRSupport is described as 'NTRsupport Ultimate is an On-demand Remote Support for Multi-agent teams that allows you to offer remote support to all Windows & Linux-based PCs, Macs & smartphones' and is a Remote Desktop tool in the network & admin category. There are more than 25 alternatives to NTRSupport for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best NTRSupport alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try TeamViewer or AnyDesk. Other great apps like NTRSupport are TightVNC, UltraVNC, DWService and LogMeIn Resolve.