Self-Hosting Outline: Replace Notion With Your Own Team Knowledge Base

Notion is everywhere. It’s the default wiki for startups, the meeting notes hub for agencies, the project tracker for small teams, and the async brainstorming board for remote companies. It earned that position honestly — the editing experience is smooth, the templates are useful, and the collaborative features work well.

But Notion has a pricing model that scales painfully. The Plus plan runs $10 per user per month. The Business plan is $18 per user per month. A 15-person team on the Business plan pays $270 every month — $3,240 per year — for what is essentially a shared document workspace. Add 10 more people and you’re at $5,400. And every dollar goes to a third party that controls your data, your access, and your pricing.

If your team’s knowledge base lives entirely in someone else’s cloud, you don’t own your institutional memory. You’re renting it.

Outline is the self-hosted alternative. It’s a fast, collaborative, real-time knowledge base built with React and Node.js. It has the block-based editor, the nested document structure, the search, the comments, the templates, and the API that teams have come to expect from modern wiki tools — but you run it on your own infrastructure. No per-seat fees. No vendor lock-in. No surprise pricing changes.

With over 41,000 GitHub stars and an active development community pushing updates on a near-daily basis, Outline is one of the most mature self-hosted knowledge base tools available today.

In this post, we’ll compare Outline to Notion, walk through what you get, and show you how to deploy it with Docker Compose in under an hour.

What Outline Gives You

Outline is designed to be a team knowledge base — not a general-purpose database or project management tool. This focus is a strength. Where Notion tries to be everything (documents, databases, Kanban boards, calendars, forms), Outline does one thing very well: structured, collaborative documentation.

Here’s what’s included in the self-hosted community edition:

• Real-time collaborative editing — Multiple people can edit the same document simultaneously, with live cursors and instant sync
• Block-based editor — Drag-and-drop blocks for text, headings, lists, code, tables, images, and embedded content
• Markdown support — Write in Markdown or use the visual editor; import existing Markdown files directly
• Nested document hierarchy — Organize documents in collections and sub-documents, with drag-to-reorder
• Full-text search — Fast, indexed search across all documents and content
• Comments and @mentions — Leave inline comments, mention teammates, and get notifications
• Document templates — Create reusable templates for meeting notes, RFCs, onboarding docs, etc.
• Groups and permissions — Control who can view, edit, and manage collections through group-based access control
• API and webhooks — Programmatically create, update, and retrieve documents; trigger webhooks on events
• Integrations — Connect to Slack, Mattermost, GitHub, and more via webhooks and the API
• Audit logs — Track who did what, when, across the entire workspace
• Multi-language support — Available in 17+ languages with community translations
• Dark mode — Because developers insist

What you don’t get in the self-hosted edition is the AI question-answering feature that Outline’s cloud offering includes. But if you’re running Ollama alongside your stack (as we’ve covered in previous posts), you can build your own AI-powered document search using Outline’s API and a local LLM — more on that later.

Outline vs Notion: A Head-to-Head

The trade-off is clear. Notion gives you more breadth — databases, Kanban boards, calendars — but at a per-user cost that compounds as your team grows. Outline gives you a focused, high-quality documentation experience with zero per-user cost and full data ownership.

If you need project management alongside your wiki, pair Outline with an open source project management tool (we covered options in our open source project management post) or use NocoDB for databases. The combination costs less than a single Notion subscription.

Understanding the License

Outline is licensed under the Business Source License (BSL) 1.1. This is important to understand because it’s source-available — not the same as OSI-approved open source.

Here’s what BSL 1.1 means in practice for Outline:

• You CAN self-host Outline for your own team or organization
• You CAN modify the code for internal use
• You CAN contribute back to the project
• You CANNOT sell, resell, or host Outline as a service to others
• You CANNOT offer Outline as a hosted product to customers

For 99% of businesses reading this post, the license is a non-issue. You’re hosting it for your own team, which is explicitly permitted. The restriction only matters if you’re trying to build a business around hosting Outline for other companies — and Outline Inc. offers paid Enterprise and Business licenses for exactly that use case.

If you need a truly OSI-approved open source wiki instead, BookStack (MIT licensed) is the alternative we covered in an earlier post. But Outline’s real-time collaboration and block editor are closer to the Notion experience most teams are looking for.

Requirements: What You Need to Run Outline

Outline is engineered as a horizontally scalable platform, which means it has a few more dependencies than simpler self-hosted tools. Here’s what you need:

Server:

• Any Unix-based OS (Ubuntu, Debian, etc.) — Outline does not run on Windows Server
• Minimum 512MB RAM (1GB recommended for small teams)
• Docker and Docker Compose

Software dependencies (handled by Docker Compose):

• PostgreSQL v14 or later
• Redis v4 or later

Other requirements:

• A dedicated domain or subdomain (e.g., docs.yourcompany.com)
• An authentication provider — Outline requires OIDC-compatible SSO. It supports self-hosted options like Keycloak, Authentik, or Authelia, as well as cloud providers like Auth0 and Okta
• SMTP server for email notifications (optional but recommended)

Recommended VPS specs for a small team (up to 25 users):

• 2 vCPU, 2GB RAM, 20GB SSD
• Cost: ~$6–12/month from providers like Hetzner, DigitalOcean, or Linode

The authentication provider requirement is the one that catches people off guard. Outline doesn’t have its own built-in username/password system — it relies on an external identity provider. If you’re already running Keycloak or Authentik for other services, this is a non-issue. If not, you’ll need to set one up, which adds some initial complexity. We’ll address this in the setup section.

Deploying Outline with Docker Compose

Here’s a complete Docker Compose configuration that includes Outline, PostgreSQL, Redis, and an HTTPS reverse proxy. This setup is suitable for a small to mid-size team.

Step 1: Create the project directory

mkdir -p ~/outline && cd ~/outline

Step 2: Create the docker-compose.yml

services:
  outline:
    image: outlinewiki/outline:latest
    env_file: ./docker.env
    expose:
      - "3000"
    volumes:
      - storage-data:/var/lib/outline/data
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy

  redis:
    image: redis:7
    expose:
      - "6379"
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 10s
      timeout: 30s
      retries: 3

  postgres:
    image: postgres:16
    expose:
      - "5432"
    volumes:
      - database-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD", "pg_isready", "-d", "outline", "-U", "outline"]
      interval: 30s
      timeout: 20s
      retries: 3
    environment:
      POSTGRES_USER: outline
      POSTGRES_PASSWORD: change_this_strong_password
      POSTGRES_DB: outline

  https-portal:
    image: steveltn/https-portal:1
    ports:
      - '80:80'
      - '443:443'
    links:
      - outline
    restart: always
    volumes:
      - https-portal-data:/var/lib/https-portal
    environment:
      DOMAINS: 'docs.yourcompany.com -> http://outline:3000'
      STAGE: 'production'
      WEBSOCKET: 'true'
      CLIENT_MAX_BODY_SIZE: '0'

volumes:
  https-portal-data:
  storage-data:
  database-data:

Note: Pin your image versions for production. Instead of outline:latest, use a specific version like outlinewiki/outline:0.82.0. This gives you control over when upgrades happen and avoids surprise breaking changes.

Step 3: Create the docker.env file

This file contains all the configuration variables Outline needs. Here’s a working template:

# === Core ===
URL=https://docs.yourcompany.com
PORT=3000

# === Database ===
DATABASE_URL=postgres://outline:change_this_strong_password@postgres:5432/outline

# === Redis ===
REDIS_URL=redis://redis:6379

# === Security ===
# Generate with: openssl rand -hex 32
SECRET_KEY=generate_a_64_char_hex_string_here

# === Authentication ===
# Outline requires an OIDC-compatible auth provider
# Example with Keycloak:
OIDC_CLIENT_ID=outline
OIDC_CLIENT_SECRET=your_oidc_client_secret
OIDC_AUTH_URI=https://auth.yourcompany.com/realms/company/protocol/openid-connect/auth
OIDC_TOKEN_URI=https://auth.yourcompany.com/realms/company/protocol/openid-connect/token
OIDC_USERINFO_URI=https://auth.yourcompany.com/realms/company/protocol/openid-connect/userinfo
OIDC_USERNAME_CLAIM=preferred_username
OIDC_DISPLAY_NAME=Company SSO
OIDC_SCOPES="openid profile email"

# === File Storage ===
# Local storage (simplest — use S3 for production at scale)
FILE_STORAGE=local
FILE_STORAGE_LOCAL_ROOT_DIR=/var/lib/outline/data

# === SMTP (email notifications) ===
SMTP_HOST=smtp.yourprovider.com
SMTP_PORT=587
SMTP_USERNAME=your_smtp_user
SMTP_PASSWORD=your_smtp_password
SMTP_FROM_EMAIL=noreply@yourcompany.com
SMTP_REPLY_EMAIL=hello@yourcompany.com

# === Team ===
TEAM_NAME=Your Company

Generate a secure secret key:

openssl rand -hex 32

Step 4: Point your DNS

Create an A record for docs.yourcompany.com pointing to your server’s IP address. Wait for DNS to propagate (usually a few minutes to an hour).

Step 5: Start everything

docker compose up -d

Check the logs to make sure everything started cleanly:

docker compose logs -f outline

Look for “Outline is now running” or similar. The HTTPS proxy will automatically provision Let’s Encrypt certificates for your domain.

Step 6: Log in

Navigate to https://docs.yourcompany.com. You’ll be redirected to your authentication provider to log in. Once authenticated, you’ll be redirected back to Outline and can start creating documents.

Setting Up Authentication: The One Hurdle

The most common stumbling block with Outline is the authentication requirement. Unlike simpler wiki tools that have built-in user management, Outline delegates authentication to an external provider via OIDC (OpenID Connect).

If you’re already running a self-hosted identity provider, great — just register Outline as a new OIDC client. If not, here are your options:

Keycloak (MIT/Apache 2.0 licensed):

• Full-featured identity and access management
• Runs well in Docker alongside Outline
• Supports SSO across all your self-hosted tools
• Best choice if you plan to self-host multiple services

Authentik (MIT licensed):

• Modern, flexible authentication platform
• Excellent UI and workflow builder
• Good for teams that want visual configuration

Authelia (Apache 2.0 licensed):

• Lightweight, focused on reverse proxy authentication
• Simpler than Keycloak but less feature-rich
• Good for smaller setups

Cloud providers (Auth0, Okta, Azure AD):

• If you already use one of these, just register Outline as an app
• Less self-hosting but zero auth infrastructure to maintain

For a team that’s just getting started with self-hosting, adding Keycloak to your Docker Compose stack is the most common approach. It adds about 200MB of RAM usage and gives you SSO across Outline, Mattermost, NocoDB, and any other OIDC-compatible tool you deploy later.

What About AI Features?

Notion offers “Notion AI” as an add-on — $10 per user per month on top of the base subscription. It can summarize pages, answer questions about your workspace, and generate content.

Outline’s cloud offering includes AI question-answering built in. The self-hosted community edition doesn’t include AI out of the box, but because Outline has a full API, you can build your own AI features using tools we’ve covered before.

Here’s a simple approach using Outline’s API and Ollama:

1. Install Ollama on your server (we covered this in our Ollama guide)
2. Pull a model — ollama pull llama3.2 or ollama pull qwen2.5
3. Create an n8n workflow that:
   • Fetches document content from Outline via its API
   • Sends the content to Ollama as context
   • Lets team members ask questions in Mattermost or via a simple web form
   • Returns AI-generated answers grounded in your actual documentation

This gives you a private, self-hosted “chat with your wiki” feature without sending a single byte of your internal documentation to a third-party AI provider. The API makes it straightforward:

# Fetch all documents from a collection via Outline API
curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://docs.yourcompany.com/api/documents.list?collectionId=xxxxx

Feed those documents into Ollama as context, and you have a knowledge-base-aware AI assistant running entirely on your own infrastructure.

Cost Comparison: The Real Math

Let’s break down the actual costs for three team sizes:

5-person team

15-person team

50-person team

Even accounting for setup time (a few hours of a developer’s time) and ongoing maintenance (updates every few months), the savings are substantial. For a 50-person team, you’re saving over $10,000 annually — enough to fund an additional hire or invest in other infrastructure.

When to Choose Notion Over Outline

Self-hosting isn’t always the right answer. Here’s when Notion is genuinely the better choice:

• You need databases and Kanban boards in one tool — Notion’s database views (table, board, calendar, gallery) are unmatched in a single tool. Outline is a knowledge base, not a project manager.
• Your team is very small (1–3 people) — The overhead of setting up authentication and Docker may not be worth the savings at this scale. Notion’s free plan covers most individual use cases.
• You don’t have anyone who can manage a server — Outline requires some dev-ops knowledge. If nobody on your team can run Docker and debug a container, the SaaS premium is worth paying.
• You rely heavily on Notion integrations — Notion has hundreds of native integrations. Outline has a solid API and webhooks, but fewer turnkey integrations.
• You need offline access — Notion has limited offline support. Outline requires a server connection. If offline editing is critical, neither is ideal.

For teams of 5+ people who primarily use Notion as a knowledge base and wiki, the case for Outline is strong. The savings compound, the features are comparable for documentation use cases, and you own your data outright.

Migrating from Notion

Outline includes a built-in importer for Notion. The process is straightforward:

1. Export your Notion workspace as Markdown + CSV (Notion supports this natively via Settings → Export)
2. In Outline, go to Settings → Import
3. Select “Notion” as the import source
4. Upload the exported archive

Outline also supports imports from Confluence, Slab, and raw Markdown files, so if you’re coming from a different tool, the migration path exists.

The import preserves document hierarchy, content blocks, and basic formatting. Complex Notion databases won’t import (since Outline doesn’t have a database feature), but text documents, meeting notes, wikis, and SOPs come through cleanly.

Backing Up Your Knowledge Base

When you self-host, backups are your responsibility — but they’re also entirely in your control. For Outline, you need to back up two things:

1. PostgreSQL database (contains all document content, users, permissions):

# Daily database backup
docker compose exec postgres pg_dump -U outline outline > \
  /backups/outline-db-$(date +%Y%m%d).sql

2. File storage (contains uploaded images and attachments):

# Sync storage volume to backup location
rsync -avz ~/outline/storage-data/ /backups/outline-files/

We covered a complete backup strategy for self-hosted stacks in our disaster recovery guide, including automated cron jobs and off-site replication. The same principles apply here.

The Bottom Line

Notion is an excellent product. It’s also an expensive subscription that scales linearly with headcount and locks your team’s collective knowledge in someone else’s infrastructure.

Outline gives you 80% of the Notion experience for documentation — real-time collaboration, a polished block editor, templates, search, comments, permissions, and an API — at the cost of a $6/month VPS and a few hours of setup time. The trade-off is no built-in databases, a required authentication provider, and the responsibility of running your own server.

For teams that have outgrown Notion’s pricing but still want a modern, collaborative knowledge base, Outline is the strongest self-hosted option available. Pair it with NocoDB for databases, a project management tool for task tracking, and Ollama for AI features, and you’ve replaced Notion’s entire value proposition with open source tools you control.

Ready to Take Control of Your Team’s Knowledge?

At ARDOT Consulting, we help businesses design and deploy self-hosted automation stacks tailored to their needs. Whether you’re migrating from Notion, setting up Outline for the first time, or building a complete open source collaboration suite, we can guide you through every step — from server setup to authentication, migration, and AI integration.

Contact us through the form on our homepage to schedule a consultation. We’ll assess your current setup, recommend the right tools for your team, and handle the deployment so you can focus on what matters: running your business.

No vendor lock-in. No per-seat fees. Just your knowledge, on your terms.