BookStack is a fully open-source, self-hosted wiki and documentation platform created in 2015 by Dan Brown, a UK-based full-stack web developer. The project was initially started under the working name "Oxbow" (first commit 12 July 2015) and has grown over the past decade into a category-defining "open-source Confluence alternative", particularly popular with IT teams, technical documentation sites, internal knowledge bases, and home-lab self-hosters. The codebase is fully MIT-licensed and source-available on Codeberg (mirror on GitHub), meaning buyers can fork, modify, redistribute, and use commercially with no licence restrictions or copyleft obligations.
Technical stack: PHP with the Laravel framework + MySQL, standard LAMP-style deployment that runs on any Hetzner / OVHcloud / Scaleway / IONOS VPS with minimal resource requirements. Content organisation is structured into Books → Chapters → Pages with WYSIWYG and Markdown editing, full-text search, role-based access controls, LDAP / SAML / OIDC SSO, multi-language UI for 10+ locales, PDF and Markdown export, image management, and a clean RESTful API. The project explicitly does not operate a managed SaaS: third-party sponsor companies (Stellar Hosted, Cloudabove) offer BookStack hosting commercially but are explicitly not vetted or supported by Dan Brown's project team, so the "official" BookStack experience is self-host.
For procurement-grade EU buyers BookStack is structurally one of the cleanest listings in this directory: no commercial entity to acquire or pressure, no VC investors, no parent company, fully MIT-licensed source code that can be forked at will, no managed cloud to worry about region selection on. Best fit: IT teams building internal knowledge bases, technical documentation projects, EU public-sector buyers who want MIT-licensed self-host as the procurement-grade default, home-lab and engineering-team self-hosters, organisations that want to escape Confluence's licensing complexity. The only minor caveats are the solo-developer maintenance model (some procurement teams require formal vendor SLA which BookStack doesn't offer directly; third-party hosting sponsors fill that gap) and the UK-post-Brexit other ownership tier (which is moot if you self-host since you control the deployment jurisdiction).