Open source Notion alternatives: AppFlowy, AFFiNE, Outline and Docmost

What are you really using Notion for?

Notion blends several tools: a document editor, a wiki, lightweight databases, project boards and personal notes. No open source project matches all of it equally well, so the first step is naming the job you care about most.

Teams that mainly write documentation need a fast wiki with search, permissions and a clean editor. People who build trackers and linked databases need a workspace tool. Mixing those requirements is how migrations stall.

Once the main job is clear, the shortlist usually shrinks to one or two projects.

It also helps to count users and guests. A tool that works well for five people may feel different with fifty, especially around permissions and search.

Which open source Notion alternatives should you compare?

Licence families differ a lot in this list, from copyleft to source-available. That rarely matters for internal use, but it matters a great deal if you plan to host workspaces for clients or build a product on top.

AppFlowy and AFFiNE: the workspace options

AppFlowy targets Notion most directly. It offers documents, grid, board and calendar views over databases, and runs as a native app on desktop and mobile. Data can stay local, and a self-hosted cloud component provides sync and collaboration.

AFFiNE combines page editing with an edgeless whiteboard where the same blocks can live on a canvas. It suits teams that plan visually and want notes and diagrams side by side.

Both are moving quickly. Check which features are included in the self-hosted build you intend to run, rather than relying on the hosted product’s marketing page.

For teams that rely on Notion databases for project tracking, test the specific views you use every day. Filters, sorting, grouping and relations vary in maturity between tools and releases.

Outline and Docmost: the wiki options

Outline is a polished knowledge base with collections, nested documents, fast search and a markdown-friendly editor. Self-hosting requires Postgres, Redis, file storage and an authentication provider such as an OIDC or OAuth service, which is extra work up front.

Docmost is a newer wiki with spaces, permissions, real-time collaboration and diagram support. It is simpler to stand up with Docker Compose and is aimed squarely at teams replacing Confluence or Notion as a wiki.

Outline’s Business Source License restricts some commercial uses, so read the terms if you plan to host it for other companies.

Both wikis handle the main wiki needs well: nested pages, search, comments, history and sharing. Neither tries to be a database tool, so trackers and CRMs built in Notion need a different home.

That split is often healthier anyway. Documentation in a wiki and structured work in a dedicated tracker tend to age better than one tool doing both.

How to choose and roll out step by step

Pilot with one team for a few weeks. Pick a team with a clear documentation need and a willing lead, migrate their pages and collect the friction points before anyone else moves.

Then decide the structure: spaces or collections per team, a naming convention and who can create top-level areas. Structure decided early saves a messy reorganisation later.

Before the pilot ends, write down what would make you stop. Clear exit criteria keep a trial honest and stop a half-working tool from becoming permanent by default.

Finally, check the export path of the new tool too. Being able to leave again in Markdown or HTML is the best insurance against repeating this migration under pressure.

• Export a representative slice of your Notion workspace, including a few complex databases.
• Classify your content: mostly documents, mostly databases or an even mix.
• Documents first: trial Outline or Docmost. Databases first: trial AppFlowy or AFFiNE.
• Check authentication: do you need SSO, and does the tool support your provider?
• Import your sample and inspect what broke: tables, embeds, mentions and nested pages.
• Confirm the licence fits your use, especially if you serve clients from one instance.

How much does self-hosting cost to run?

These tools run comfortably on a small server for a team, with Postgres and object storage for files. The main costs are backups, upgrades and the time spent on authentication and email configuration.

Desktop-first tools like AppFlowy shift some load onto users’ devices, which keeps server needs low. Wikis like Outline and Docmost rely more on the server, so plan storage for attachments, which usually grows faster than text.

Back up both the database and the file storage, and test a restore on a second machine. A backup nobody has restored is only a hope.

Common mistakes when leaving Notion

A migration is a good moment to archive. Move only what people used recently and keep the Notion export as a read-only archive.

Also plan communication. Tell people where new documents go from a specific date, and make the old workspace read-only so the two do not drift apart.

• Expecting a perfect import; relations, rollups and formulas rarely survive intact.
• Choosing a workspace tool when the team mostly needed a wiki, or the reverse.
• Skipping SSO planning and ending up with a second set of passwords.
• Ignoring file storage, then filling the server disk with uploaded images.
• Migrating everything, including years of abandoned pages nobody reads.
• Not assigning an owner for upgrades, so the instance quietly falls behind.

What can you build on top, including AI features?

Several of these projects have added AI writing and question-answering features that call a model provider you configure. For a self-hosted setup, that means you decide whether document text goes to a hosted API or to a local model.

If you want question answering across your whole knowledge base, a separate retrieval layer with proper permissions is often more reliable than a built-in assistant. RepoLoot’s catalog includes knowledge-base and retrieval projects that pair well with a self-hosted wiki.

Open APIs make these tools part of larger systems. Outline and Docmost can serve as the knowledge source for an internal assistant, while AppFlowy databases can act as lightweight trackers fed by automation workflows.

Because you host the data, you can also run nightly exports to Git or object storage. That gives you versioned backups and a plain-text archive that outlives any single tool.

Agencies sometimes deploy one instance per client as a documentation portal. Check the licence before doing this, since copyleft and source-available terms treat hosting for others differently.

How do they compare on the details that matter daily?

Beyond headline features, a few everyday details decide whether people keep using a tool. Check these during your pilot, because they vary by version and edition.

Frequently asked questions

What is the closest open source alternative to Notion?

AppFlowy is usually the closest match, with Notion-like pages, databases and board, grid and calendar views. AFFiNE is a strong option if you also want a whiteboard. For documentation-focused teams, a wiki like Outline or Docmost may fit better than a full Notion clone.

Can I import my Notion workspace?

Most alternatives import Notion’s Markdown or HTML exports, and some offer direct importers. Plain pages usually come across well; databases with relations, rollups and formulas often need manual rebuilding. Test with a sample of your most complex pages before committing.

Is Outline free to self-host?

Outline’s source is available under the Business Source License, which permits self-hosting for your own use but restricts some commercial offerings. Read the licence text for your situation. You also need an authentication provider, Postgres, Redis and file storage.

Which option works offline?

AppFlowy and Anytype are built local-first, so you can work offline and sync later. AFFiNE also supports local workspaces. Server-based wikis such as Outline and Docmost need a connection to the server, which is normal for shared team documentation.