What are some alternatives?
When comparing Webmin and Ajenti, you can also consider the following products
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.
ServerPilot.io - Centralized hosting control panel for Wordpress and PHP web sites
ISPConfig - ISPConfig 3 is an open source hosting control panel for Linux.
Vesta Control Panel - – What I love about Vesta is that it's fast and easy to use
CyberPanel - CyberPanel is web hosting control which is based on OpenLiteSpeed.
CentOS Web Panel - Free CentOS Linux Web Hosting control panel designed for quick and easy management of (Dedicated & VPS) servers without of need to use ssh console for every little thing