The open-source LMS standard, especially in higher education — free to run, but you own the hosting and setup.
Visit MoodleMoodle's biggest strength is that it's free and endlessly customizable via plugins, which is why so many universities run it. The tradeoff is real: you (or an IT team) own hosting, updates, and security, and the interface feels dated next to newer paid LMS platforms. Best fit for institutions with technical staff who want full control rather than a managed SaaS experience.