Simplehelp is described as 'Web based remote support software for a one time purchase with no subscription. Support your customers as well as the leading brand but for a fraction of the cost. Your customers join a central queue simply by visiting your website with the SimpleHelp client integrated as just' and is a Remote Desktop tool in the network & admin category. There are more than 50 alternatives to Simplehelp for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Simplehelp alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try TeamViewer or RustDesk. Other great apps like Simplehelp are Remmina, DWService, LogMeIn Resolve and NoMachine.
Only other self-hosted option