Kloxo is a free, open-source (AGPL v3) hosting control panel, formerly Lxadmin, installing on RHEL 8/9-family systems with about 130 one-click apps and switchable Apache/lighttpd and BIND/djbdns stacks, suited to budget virtual hosting.
KeyHelp is an open-source server control panel developed by German hosting provider Keyweb AG, free in the base version and EUR 9/month for Pro, supporting Ubuntu/Debian, 15+ languages and unlimited domains as a low-cost cPanel/Plesk alternative.
i-MSCP is a free, open-source hosting control panel led by French developers, letting one panel manage web, mail, DNS and database servers with PHP 5.6 to 8.x support. With no license fees, it suits budget-conscious small hosters and self-hosted environments.
EaglePanel is a free, open-source, lightweight server control panel built on OpenResty, offering one-click website creation, Let's Encrypt SSL, and a basic WAF with low resource usage for individuals and small teams doing lightweight hosting.
CloudPanel is a free open-source server control panel from Berlin, Germany, with 250,000+ server installations worldwide, running on as little as 1 core and 2GB RAM, built on a lightweight NGINX/PHP-FPM stack with one-click WordPress deployment and free SSL.
CentOS Web Panel (now Control Web Panel) is a free open-source server control panel running on 10,000+ dedicated servers and VPS, with an Apache/Nginx/mail stack and Mod Security protection for small teams managing CentOS/AlmaLinux hosts.
ISPConfig is an open-source Linux hosting control panel created in 2005 by German developers Till Brehm and others, released free under the BSD license. It offers multi-server management with web, DNS, mail, and database administration in one console, a cost-effective open alternative to cPanel and Plesk.
CyberPanel is a free open-source hosting control panel built for OpenLiteSpeed, deployed on 500,000+ servers, with WordPress Manager, AutoSSL, and Docker management as a high-performance open alternative to cPanel.
Sentora is a free, open-source (GPLv3) web hosting control panel, a community fork of ZPanel that manages websites, databases, DNS, and email for multiple clients from a single installation - a zero-cost option for self-hosted shared hosting.