Plone is a free and open source content management system (CMS) built on top of the Zope application server.

Plone is positioned as an enterprise CMS and is commonly used for intranets and as part of the web presence of large organizations.

In addition, "sprints" are held, where groups of developers meet to work on Plone, ranging from a couple of days to a week.

This new release brought inline editing, an upgraded visual editor, and strengthened security, among many other enhancements.

Plone by default stores all information in Zope's built-in transactional object database (ZODB).

In addition, Plone comes with a user management system called Pluggable Authentication Service (PAS).

Most importantly, PAS covers the security involved for users and groups, requiring authentication in order to log into Plone.

[19] Plone is built on the Zope application framework and therefore is primarily written in Python but also contains large amounts of HTML and CSS, as well as JavaScript.

In addition, Plone has an active IRC channel to give support to users who have questions or concerns.

A 2007 comparison of CMSes rated Plone highly in a number of categories (standards conformance, access control, internationalization, aggregation, user-generated content, micro-applications, active user groups and value).

[25] According to Mitre, Plone has the lowest number of reported lifetime and year to date vulnerabilities when compared to other popular Content Management Systems.

This security record has led to widespread adoption of Plone by government and non-governmental organizations, including the FBI.