MoinMoin

MoinMoin is a free, extensible wiki engine for organizations that want to publish and maintain editable pages on infrastructure they operate. It is strongest for technically capable teams that need detailed revision control, permissions, and integration hooks rather than a hosted service. The trade-off is an aging stable release and the operational responsibility that comes with self-hosting.

Overview

MoinMoin has been developed since 2000 and is released as Free Software under the GNU GPL. Its design favors administrators who want control over deployment and storage: page content lives in directories, with no required external SQL database, PHP installation, or separate revision-control system. That can simplify a small or specialized installation, while still leaving routine server administration, upgrades, backups, and security work to the operator.

The project offers free help through its wiki, mailing list, and chat channel, with paid assistance from consultants and developers when a deployment needs professional support. Version 1.9.11 is the general release, while the 2.0 repository is described as unstable and at best alpha quality. Version 1.9.11, released on November 8, 2020, includes fixes for CVE-2020-25074 and CVE-2020-15275; organizations with strict security or lifecycle requirements should account for that release age before standardizing on it.

Key features

Contributors can choose a WYSIWYG editor or text markup. That combination accommodates occasional editors who prefer visual controls while preserving a precise, text-oriented workflow for experienced authors. Automatic revision backups, revision lists, and diffs between any two versions support auditing and recovery without a separate version-control product.

Search handles titles, full text, multiple terms, and Boolean expressions. Optional Xapian indexing reaches into attachments and older revisions, which is particularly useful once a wiki has accumulated years of documents and edits. Configurable edit locks or warnings help teams avoid overwriting one another, and RSS feeds for RecentChanges provide a lightweight way to monitor activity.

Administrators can define access control lists, select from multiple authentication methods, reuse web-server authentication, and add modular authentication for single sign-on. These controls make MoinMoin suitable for mixed public and restricted content, but they also put policy design and identity integration in the administrator's hands. Extension points cover macros, parsers, actions, formatters, XML-RPC, and themes. Named integrations include email and Jabber notifications, email import, wiki synchronization, and XML-RPC.

Pricing

The MoinMoin plan costs nothing. It includes the GPL-licensed software, advanced page permissions, API access, and self-hosted deployment. There are no paid tiers or seat charges stated, so the financial advantage is clearest for teams able to supply their own hosting and administration. The price does not remove the work of operating the server, maintaining the installation, or arranging optional paid support.

Platforms

MoinMoin supports API access and web use across Linux, macOS, Windows, and self-hosted environments. Its deployment documentation also names UNIX, BSD, and OpenVMS, with CGI, WSGI, a standalone Python HTTP server, FastCGI, and other server options. That breadth helps organizations fit the wiki to existing infrastructure, although choosing and maintaining a suitable deployment remains an administrator's task.

Who it's for

MoinMoin fits teams, communities, and internal groups that need a collaborative knowledge space with granular permissions, searchable historical content, and extensibility. It is a sensible choice when self-hosting, directory-based storage, and GPL licensing matter more than a vendor-managed experience. It is a weaker fit for buyers seeking a current, low-maintenance hosted product or a clearly mature next-generation release.

Pros and cons

Pros

• Deep history tools: backups, arbitrary-version diffs, and revision lists make change tracking and restoration practical.
• Powerful discovery: Boolean search and optional Xapian indexing cover attachments and old revisions.
• Administrative control: ACLs, SSO-capable authentication, APIs, and broad extension points support tailored deployments.
• Flexible infrastructure: directory storage avoids a mandatory SQL database, while multiple server modes and operating systems are supported.

Cons

• Release-age risk: the stable 1.9.11 release dates from 2020, and the 2.0 repository is not presented as production-ready.
• Self-hosting burden: hosting, maintenance, upgrades, and operational security are the customer's responsibility.
• Technical administration required: advanced authentication, permissions, and extensions reward expertise but increase setup complexity.

Alternatives

Choose TiddlyWiki instead if you want another free, open-source option spanning web, desktop, mobile, and self-hosted platforms.

Confluence is the better pick for a hosted, freemium workspace with a free-forever tier for up to 10 users, 2 GB of file storage, and three active whiteboards per user.

Consider Foswiki for a community-supported, self-hosted wiki with a similar broad platform footprint.

ikiwiki is an alternative free software choice for Linux, macOS, web, and self-hosted deployments.

Choose MediaWiki for GPL-licensed, self-hosted wiki software available across API, desktop, web, and Windows environments.

PmWiki suits readers who want free, open-source self-hosting built on PHP, with paid technical support and development available.

Tiki Wiki CMS Groupware is another free, self-hosted open-source option for Linux, macOS, web, and Windows.

TWiki is a free GPL option centered on Perl CGI source code, templates, and documentation, and requires web-server administration.

Browse Wiki Software for more wiki products, or compare broader Knowledge base software.

Verdict

Choose MoinMoin if your team can run its own service and values granular permissions, searchable revision history, and extensive customization at no license cost. Look elsewhere if a current release cadence, hosted convenience, or minimal administration is more important than directory-based self-hosting and GPL control.