What are some alternatives?
When comparing Ajenti and Vesta Control Panel, you can also consider the following products
Webmin - Webmin, Usermin, Virtualmin, Cloudmin, Linux, System Administration
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.
ServerPilot.io - Centralized hosting control panel for Wordpress and PHP web sites
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
CyberPanel - CyberPanel is web hosting control which is based on OpenLiteSpeed.