Gollum

What it does

Access control

The README describes adding basic user support by running Gollum alongside a CAS single sign-on server with some configuration.checked 8 Oct 2026

Audience

Gollum is presented as a Git-based wiki that can be used for documentation and edited locally or through its web interface.checked 8 Oct 2026

Authentication

Gollum can run alongside a CAS single sign-on server, which the documentation says adds basic user support.checked 8 Oct 2026

Content storage

A Gollum wiki is a Git repository containing editable text or markup files, and pages can be organized into directories.checked 8 Oct 2026

Deployment

Gollum can be installed as a Ruby gem, run through Docker or Rack, or launched from a Java WAR file.checked 8 Oct 2026

Editing and history

Pages can be edited in the built-in web interface or with an external editor, and users can view earlier versions and revert changes.checked 8 Oct 2026

Features

The project lists Mermaid and PlantUML diagrams, citations, CriticMarkup annotations, mathematics, macros, redirects, and an RSS feed of recent changes.checked 8 Oct 2026

Git wiki compatibility

Gollum strives for compatibility with GitHub and GitLab wikis and says users can clone those wikis to view and edit them locally.checked 8 Oct 2026

Installation

The README documents installation as a Ruby gem, running through Docker, or launching a downloadable WAR file with Java.checked 8 Oct 2026

Integrations

Gollum can run with a CAS single sign-on server and with any Rack-compatible web server.checked 8 Oct 2026

Known limitation

The wiki notes that Gollum and GitHub wikis have diverged and says there are significant differences between the two platforms.checked 8 Oct 2026

Markup

Gollum ships with Markdown and RDoc support, and additional renderers can enable formats including AsciiDoc, MediaWiki, Org, and reStructuredText.checked 8 Oct 2026

Notable limitation

The project wiki says Gollum and GitHub wikis have diverged and notes that there is no live demo yet, with plans tracked as an issue.checked 8 Oct 2026

Open-source license

The repository identifies the project license as MIT.checked 8 Oct 2026

Operating systems

The project says Gollum runs on Unix-like systems and Windows; Windows requires JRuby.checked 8 Oct 2026

Page sanitization

The wiki documentation says custom CSS, JavaScript, and potentially dangerous or unknown HTML markup are stripped from generated pages.checked 8 Oct 2026

Purpose

Gollum is a simple, Git-powered wiki with a local frontend.checked 8 Oct 2026

Rich content

The project lists Mermaid and PlantUML diagrams, BibTeX and citation support, CriticMarkup annotations, mathematics, macros, redirects, and an RSS feed of recent changes.checked 8 Oct 2026

Security

The security documentation says Gollum uses Loofah’s default whitelist to filter potentially insecure HTML, and that its behavior can be changed in the configuration file.checked 8 Oct 2026

Security limitation

The security page cautions that someone with Git access can change custom CSS, JavaScript, or MathJax configuration files and thereby change application functionality.checked 8 Oct 2026

SSO support

Yeschecked 20 Sep 2026

Storage model

A Gollum wiki is a Git repository containing human-editable text or markup files, with pages organized into directories.checked 8 Oct 2026

Support and documentation

The project points users to its wiki for extensive documentation and to the contribution guide for submitting issues and getting started with development.checked 8 Oct 2026

Supported systems

Gollum runs on Unix-like systems and Windows; on Windows it runs only with JRuby.checked 8 Oct 2026