ProcessWire is a free PHP open source CMS with a great API built to save you time and make development fun at any scale. Developed by Ryan Cramer Design, LLC
License: Open Source
ProcessWire is a highly flexible and developer-friendly CMS that excels in customization, making it ideal for those with PHP skills. In contrast, Kentico CMS offers a more comprehensive out-of-the-box solution with strong marketing tools, making it better suited for enterprises and non-technical users.