Plone is a free, open-source, Python-based enterprise CMS known for security and headless REST API support. See features, pros, cons and alternatives.
Plone is a free and open-source content management system built on the Zope application server and written in Python, with a modern React-based frontend for both traditional and headless website deployments.
The project traces back to 1999, was first publicly released in October 2001, and has been governed since 2004 by the nonprofit Plone Foundation, making it one of the longest-running formally governed open-source CMS projects.
Plone is widely known for a strong, long-standing security track record, along with deep built-in support for granular permissions, content workflows, multilingual sites and accessibility compliance out of the box.
It exposes a full REST API, enabling both traditional server-rendered websites and fully headless architectures via the Volto React frontend, making it attractive to development teams who want flexibility in how content is delivered.
Plone itself is completely free and open source, with no licensing fees, seat limits or vendor lock-in, and can be self-hosted on any infrastructure the organization chooses.
Costs organizations do incur typically come from hosting infrastructure and optional professional services, such as implementation, theming or support contracts, from independent Plone integrators rather than from the Plone Foundation itself.
Yes, Plone is 100% free and open-source software with no licensing fees, governed by the nonprofit Plone Foundation.
Plone was created by Alexander Limi, Alan Runyan and Vidar Andersen, beginning in 1999 and first released publicly in October 2001.
Plone is built on the Zope application server and written primarily in Python, with a React-based frontend called Volto for modern and headless deployments.
Yes, Plone exposes a full REST API and supports headless deployments through its Volto React frontend, alongside traditional server-rendered sites.
Plone is commonly used by government agencies, universities, large nonprofits and enterprises with strong security, workflow or multilingual requirements.
Plone offers stronger built-in security, workflow and permissions capabilities suited to complex organizations, while WordPress has a much larger plugin ecosystem and gentler learning curve.
The Plone Foundation itself does not sell support, but independent Plone integrators and agencies offer paid implementation, hosting and support services.