What are some alternatives?
TeamViewer - TeamViewer lets you establish a connection to any PC or server within just a few seconds.
osTicket - osTicket is a widely-used open source support ticket system.
LogMeIn - LogMeIn gives you fast, easy remote access to your PC or Mac from your browser, desktop and mobile...
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
AnyDesk - AnyDesk is the world's most comfortable remote desktop application. Access all your programs, documents and files from anywhere, without having to entrust your data to a cloud service.
ZenDesk - Zendesk is a beautiful, lightweight help-desk solution.