What are some alternatives?
When comparing SolidCP and Ajenti, you can also consider the following products
InterWorx - The InterWorx Web Control Panel is a Linux based dedicated server and VPS web hosting control panel.
Webmin - Webmin, Usermin, Virtualmin, Cloudmin, Linux, System Administration
YunoHost - YunoHost is a Debian GNU/Linux based distribution packaged with free software that automates the...
cPanel - With its first-class support and rich feature set, cPanel & WHM has been the web hosting industry's most reliable, intuitive control panel since 1997.
ISPConfig - ISPConfig 3 is an open source hosting control panel for Linux.