BookStack

BookStack is an open source platform for creating documentation and wikis, built around an intuitive books, chapters, and pages model. It is a popular self-hostable alternative to Confluence, Notion, and Slab for teams that want a structured, easy-to-use knowledge base without a heavy subscription.

BookStack provides a WYSIWYG editor, a full-text search, image management, multi-factor authentication, role-based permissions, LDAP/OIDC SSO, and a built-in audit log. Content can be organised in a flat hierarchy (Books → Chapters → Pages) or with tags, and access can be fine-tuned at every level.

Released under MIT and built on PHP, Laravel, and MySQL, BookStack is a great fit for internal documentation, handbooks, and team wikis that need structure, simplicity, and full data ownership.