What is Outline used for?

Outline is a collaborative team knowledge base and wiki with realtime editing and Markdown compatibility, built with React and Node.js and available hosted or self-run. It is a good fit for company wiki and internal documentation, team handbooks and onboarding guides, and replacing Confluence with a lighter tool.

Is Outline open source?

Yes. Outline is open source under a custom licence. Its source code is on GitHub at outline/outline and is written mainly in TypeScript.

Yes. Outline is open source, so the software itself is free to use under the terms of its own licence. A managed cloud version is also available, with paid plans from $10 per month.

Can I self-host Outline?

Yes. Outline can be self-hosted on your own server or infrastructure.

What is Outline an alternative to?

Outline is an open-source alternative to Confluence, Notion, Slab and Nuclino. Other open-source alternatives to Confluence include Docmost, BookStack and Wiki.js.

Is Outline actively maintained?

Yes. The most recent commit to Outline was on 1 October 2026, and the latest release is v1.10.1, published on 9 September 2026. The project has 41k stars on GitHub.

Outline: open-source alternative to Confluence, Notion, Slab

About Outline

Outline is a knowledge base for teams, built with React and Node.js. It focuses on fast, collaborative writing: documents are edited together in realtime, stay compatible with Markdown, and are organized into collections so a growing team can find what it has written down.

The maintainers offer a hosted version at getoutline.com, and the repository contains the source that runs Outline and its associated services. If you only want to use Outline you do not need to run the code yourself, while teams that want their own copy can follow the documentation for a production configuration and use the published container images. Topics also mention a Slack integration.

The repository license is listed as 'Other', so review it before commercial redistribution. Outline suits teams looking for a wiki or internal documentation tool with a clean editor, as an alternative to products such as Confluence or Notion for company knowledge. The project does not accept AI-generated pull requests.

Key features

Realtime collaborative editing
Markdown-compatible document editing
Collections for organizing a wiki
Integration with Slack workspaces
Hosted service at getoutline.com
Container images for self-running

Good fit for

→Company wiki and internal documentation
→Team handbooks and onboarding guides
→Replacing Confluence with a lighter tool

Built with: TypeScript; React; Node.js; JavaScript; Docker
Tags: wiki; knowledge-base; documentation; collaboration; markdown; react; nodejs; self-hosted

Outline: questions and answers

What is Outline used for?: Outline is a collaborative team knowledge base and wiki with realtime editing and Markdown compatibility, built with React and Node.js and available hosted or self-run. It is a good fit for company wiki and internal documentation, team handbooks and onboarding guides, and replacing Confluence with a lighter tool.
Is Outline open source?: Yes. Outline is open source under a custom licence. Its source code is on GitHub at outline/outline and is written mainly in TypeScript.
Is Outline free?: Yes. Outline is open source, so the software itself is free to use under the terms of its own licence. A managed cloud version is also available, with paid plans from $10 per month.
Can I self-host Outline?: Yes. Outline can be self-hosted on your own server or infrastructure.
What is Outline an alternative to?: Outline is an open-source alternative to Confluence, Notion, Slab and Nuclino. Other open-source alternatives to Confluence include Docmost, BookStack and Wiki.js.
Is Outline actively maintained?: Yes. The most recent commit to Outline was on 1 October 2026, and the latest release is v1.10.1, published on 9 September 2026. The project has 41k stars on GitHub.