About Outline
Outline is the open-source answer to Notion and Confluence: a fast, polished team wiki with collections, nested documents, real-time editing and a search that punches above its weight. Run it on your own server with Docker and your entire knowledge base — including anything sensitive — never leaves your infrastructure.
It's the only pick that combines a genuinely modern wiki experience with full data ownership. For privacy-conscious or budget-constrained teams, it's the standout.
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The honest list
What we love
＋Free and open source (BSL) — self-host with Docker
＋Fast, modern editor and search
＋Slack, Figma and API integrations
＋Managed cloud available if you'd rather not host
Watch out for
−Self-hosting means you own backups and updates
−Fewer enterprise governance features
−No structured databases like Notion