What is WackoWiki?

WackoWiki is a lightweight wiki engine built for collaborative writing and knowledge management. It uses an easy-to-learn markup language and provides a WYTIWYG editor so contributors can see changes as they type. Each page has its own access control lists covering five permission types. The software includes full revision history with visual diffs, file attachments with automatic thumbnails, and a theming system. Email notifications keep users informed of changes. It runs on PHP 8.3 through 8.5 with Apache, Nginx, or Caddy and stores data in MariaDB, MySQL, or SQLite. Installation is done by downloading a zip archive from SourceForge, GitHub, or Codeberg and running the web-based setup wizard. The codebase is licensed under BSD-3-Clause and the maintainers offer commercial support options.

Should you self-host WackoWiki?

WackoWiki scores 44/100 on selfhost.directory (how scoring works) and ranks #27 of 31 in Wikis. It has 55 GitHub stars.

It shipped 7 stable releases in the past year. The latest, 6.3.0, came out on 6 September 2026. New versions land roughly every 4 weeks.

Setup is moderate: expect some configuration beyond a single command. It is BSD-3-Clause-licensed and written mostly in PHP.

Its closest alternative on selfhost.directory is outline (78/100, 41 098 stars). It scores higher overall, so compare the two before you pick. See WackoWiki vs outline side by side.