Wiki.js

Wiki.js is a self-hosted wiki engine designed for teams that want a clean, fast, and customizable documentation tool. It runs on Node.js and uses a Git-backed storage system, meaning every page edit becomes a commit you can review, revert, or sync with remote repositories. The interface is responsive and works well on desktop and mobile devices.

You can write content in Markdown, HTML, or AsciiDoc, and the editor supports live preview. Wiki.js supports multiple authentication providers including LDAP, SAML, OAuth (Google, GitHub, Microsoft, Discord), and local accounts. It includes a powerful search engine based on Elasticsearch or PostgreSQL FTS. The modular architecture lets you install official or community themes and modules via a built-in marketplace. It also integrates with popular services like Slack, Discord, and Mattermost for notifications.

Wiki.js is free and open source under the AGPLv3 license. It runs on Linux, Windows, macOS, Docker, and Kubernetes. The project was started by Nicolas Giard and is maintained by Requarks. It is a good choice for organizations that want full control over their documentation without vendor lock-in.