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Outline: the best Open Source alternative to Confluence in 2026

Outline is a fast, well-designed team knowledge wiki, with real-time collaborative editing, instant search and a clear collection structure.

License BUSL-1.1 40.4k stars liveUpdated hoyWebsite GitHub Repository

Technical profile

License
BUSL-1.1
Category
Productivity
Replaces
Confluence, Notion
Tech stack
Node.jsReactPostgreSQLRedis

Preview

Outline interface preview

Public image provided by Outline on its own website.

Key features

  • Real-time collaborative editing
  • Instant search
  • Collections and team permissions

Outline vs. Confluence

Pros

  • Very polished interface, fast team adoption

Things to consider

  • BUSL-1.1 license restricts offering it as a competing SaaS

Quick Docker installation guide

Copy this docker-compose.yml, adjust the example passwords and run docker compose up -d on your server. See the full step-by-step guide →

docker-compose.yml
version: "3.9"
services:
  outline:
    image: outlinewiki/outline:latest
    restart: unless-stopped
    ports:
      - "3000:3000"
    environment:
      - SECRET_KEY=change-me-super-secret
      - DATABASE_URL=postgres://outline:outline@outline-db:5432/outline
      - REDIS_URL=redis://outline-redis:6379
      - URL=http://localhost:3000
    depends_on:
      - outline-db
      - outline-redis
  outline-db:
    image: postgres:15-alpine
    restart: unless-stopped
    environment:
      - POSTGRES_USER=outline
      - POSTGRES_PASSWORD=outline
      - POSTGRES_DB=outline
    volumes:
      - outline_pg_data:/var/lib/postgresql/data
  outline-redis:
    image: redis:7-alpine
    restart: unless-stopped
volumes:
  outline_pg_data: