I like Notion. I also got tired of the invoice. So here is my honest 2026 rundown of the best open-source, self-hosted Notion alternatives – the ones you run on your own server, where adding your tenth teammate costs exactly zero extra dollars.
Here is the thing nobody tells you when your five-person side project turns into a real team: Notion charges per seat. Every person you add is another line on the bill, forever. Add a couple of contractors, a designer, the new hire, and the “cheap docs tool” is quietly $1,000+ a year, and it only climbs. You are renting your own wiki.
So I went looking for the escape hatch. I self-hosted most of these open-source Notion alternatives, read the licenses (that part matters more than you think), and sorted out which ones are truly open source, which quietly are not, which install in five minutes, and which need a small pile of infrastructure before they boot.
Why does Notion get expensive as your team grows?
Let me show you the math, because “it adds up” is too vague.
As of 2026, Notion’s paid tiers are Plus at ~$10 per user per month billed annually (~$12 if you pay monthly) and Business at ~$20 per user per month annually (~$24 monthly). Enterprise is custom. AI used to be a separate ~$8-10 per-seat add-on; Notion folded full AI access into the Business tier in 2025, and newer “Custom Agents” run on a metered credit system on top of that (~$10 per 1,000 credits). Verify the current numbers at notion.com/pricing before you quote me, but the shape is stable.
Now multiply by heads:
| Team size | Notion Plus (~$10/seat/mo) | Notion Business (~$20/seat/mo) | Self-hosted (flat) |
|---|---|---|---|
| 1 person | ~$10/mo | ~$20/mo | one server |
| 5 people | ~$50/mo | ~$100/mo | one server |
| 10 people | ~$100/mo | ~$200/mo | one server |
| 25 people | ~$250/mo | ~$500/mo | one server |
The right column does not move. That is the whole pitch for self-hosting: one server hosts your docs whether two people use it or two hundred, and you own the data instead of leasing access to it. If you are one person who loves Notion, pay them. The break-even shows up the moment you are roughly two-plus people, and it gets more lopsided every hire.
Are these Notion alternatives open source or source-available?
Before the list, one warning that separates a real recommendation from a copy-pasted one: “open source” and “you can see the source” are not the same thing.
A lot of “open-source Notion alternative” posts list tools that are source-available, meaning you can read the code and self-host it, but the license restricts what you are allowed to do (often you cannot offer it as a competing hosted service, sometimes there are other strings). That is a reasonable business model, but it is not OSI-approved open source, and if you are self-hosting specifically to avoid lock-in you should know which bucket a tool is in.
Two big ones to flag up front: Outline uses the Business Source License 1.1 (BSL), and Anytype ships under a custom “Any Source Available License 1.0.” Both are source-available, not classic open source. The rest of my picks are OSI-open (MIT, GPL, or AGPL). I have marked each one below so you are not surprised later.
What are the best open-source Notion alternatives in 2026?
Here is the shortlist, then the details. Star counts and licenses were checked against each project’s GitHub as of 2026.
| Tool | License | Truly open source? | Self-host model | Best at | GitHub stars |
|---|---|---|---|---|---|
| AFFiNE | MIT (self-host CE) | Yes | Server, needs Postgres + Redis | Docs + whiteboards + databases in one | ~70k |
| AppFlowy | AGPL-3.0 | Yes | Local-first desktop, or self-host cloud (heavier) | Notion-style projects, kanban, data ownership | ~73k |
| Outline | BSL 1.1 | No (source-available) | Server, needs Postgres + Redis + storage + external auth | Polished team wiki / knowledge base | ~40k |
| Docmost | AGPL-3.0 (core) | Yes (core; EE is separate) | Server, needs Postgres + Redis | Confluence-style team wiki with permissions | ~21k |
| Anytype | Any Source Available License 1.0 | No (source-available) | Local-first, P2P, end-to-end encrypted | Private personal knowledge OS, offline | ~8k (desktop repo only) |
| SiYuan | AGPL-3.0 | Yes | Local-first single app, Docker option | Block-based PKM, markdown, backlinks | ~45k |
| Notesnook | GPL-3.0 | Yes | Local-first apps + self-hostable sync server (alpha) | Encrypted private note-taking | ~14k |
| Trilium (TriliumNext) | AGPL-3.0 | Yes | Local-first desktop + single self-hosted server | Deep hierarchical personal knowledge base | ~37k |
AFFiNE – MIT, docs and whiteboards and databases in one
AFFiNE is the closest thing to “Notion and Miro had a baby that you own.” Docs, an infinite whiteboard, and databases live in the same workspace, and it is local-first so your data is yours. The self-host Community Edition is MIT-licensed (the repo is dual-licensed, but self-hosting is the MIT path), and it sits around ~70,000 GitHub stars. The catch: it is a heavier Node app, and the server build wants PostgreSQL and Redis behind it, so it is not a “single tiny binary” tool. More on the easy way to run it below.
AppFlowy – the closest Notion clone in feel
AppFlowy (Rust + Flutter, AGPL-3.0, ~73,000 stars) is the most direct Notion clone in feel: pages, kanban boards, databases, the works. As a desktop app it is local-first and dead simple. The friction is team sync: self-hosting AppFlowy Cloud pulls in Postgres, Redis, and an auth layer, so the multiplayer story is more infrastructure than the solo story.
Outline – a polished team wiki (source-available)
Outline is the prettiest team wiki here and the one most teams recognize as “the Notion replacement.” But it is the heaviest to run and it is BSL 1.1, not open source in the strict sense. To self-host it you need Postgres, Redis, S3-compatible object storage for attachments (MinIO, R2, or B2) or local file storage, and an external auth provider, because Outline has no built-in password login. Powerful, but budget real setup time.
Docmost – a Confluence-style wiki with permissions
Docmost (AGPL-3.0 core, ~21,000 stars) is the newer Confluence/Notion-style wiki that a lot of teams are switching to. Spaces, granular permissions, groups, page history, diagrams. It needs Postgres and Redis to run, which is middle-of-the-road effort. Note that the enterprise features live under a separate license, but the core is real AGPL.
Anytype – private, local-first, end-to-end encrypted
Anytype is the privacy maximalist: local-first, peer-to-peer, end-to-end encrypted, works fully offline, and you can self-host the any-sync backbone. It is lovely for personal or small-team knowledge you never want touching someone else’s cloud. Remember, the license is source-available, not OSI-open, and the sync model is different enough that “self-host” means running a sync node, not a classic web app.
SiYuan, Notesnook, and Trilium – the local-first crowd
SiYuan, Notesnook, and Trilium/TriliumNext are the low-infra picks. SiYuan (AGPL-3.0, ~45k stars) is a block-based markdown PKM with backlinks that runs as one app or a small Docker service. Trilium, now community-maintained as TriliumNext (AGPL-3.0, ~37k stars) after the original author archived his repo, is the pick for deep hierarchical personal wikis and runs as a single self-hosted server. Neither needs a separate database.
Notesnook (GPL-3.0, end-to-end encrypted) is the outlier to read carefully. The local apps are light and easy, but running your own Notesnook sync server is a different animal: it is officially in alpha and it is a multi-service Docker stack (MongoDB plus MinIO object storage plus identity and sync services). So the easy part is the app; hosting your own sync backbone is not yet a five-minute job. If you are one person and want zero infrastructure, start with SiYuan or Trilium.
So which open-source Notion alternative should you pick?
It depends on what you are replacing, so here is the blunt version.
If you want the all-in-one Notion-plus-whiteboards experience for a team and you want it to be truly open source, AFFiNE is my pick. If you want the most Notion-like page-and-database feel, AppFlowy. If you specifically want a team wiki and do not mind source-available licensing plus real setup, Outline or the lighter Docmost. If it is only you and you care about privacy and simplicity over collaboration, go SiYuan, Trilium, or Anytype. There is no single winner; there is a winner for your use case.
Is there a self-hosted version of Notion, and how hard is it to run?
Yes, several, and the honest answer is that “self-hosted” spans a huge effort range. That is the part cost comparisons skip.
At the easy end, SiYuan, Trilium, and Anytype are close to install-and-go, and Notesnook’s local app is too (its own sync server is the alpha exception noted above). At the hard end, Outline expects you to stand up Postgres, Redis, object storage, and wire an OAuth provider before you see a login screen. AFFiNE and Docmost sit in between, needing a database and a cache but not a whole zoo.
The real cost of DIY self-hosting is not the ~$5-10 a month for a VPS. It is you: provisioning the box, installing the app and its database, configuring nginx as a reverse proxy, getting SSL certificates, pointing DNS, and then patching all of it forever. If you enjoy that, a bare VPS is the cheapest path and I will not talk you out of it.
How do I self-host AFFiNE without becoming a sysadmin?
If you want AFFiNE but you do not want to babysit Postgres, Redis, and certbot, that gap is exactly why we built InstaPods. We host AFFiNE as a 1-Click app on a real Linux server for a flat $15 per month on our Grow plan. You click deploy, and about two minutes later you have a running AFFiNE workspace on your own server with SSL, DNS, and the reverse proxy already handled. Unlimited users, no per-seat billing, ever.
Two honest notes so this does not read like a pitch. First, AFFiNE is a heavier app, which is why it lands on the $15/mo Grow plan and not some “$3 cheapest” tier; it needs the headroom for Postgres and Redis. Second, $15/mo is more than a $5 VPS you run yourself. What you are paying the difference for is not touching provisioning, nginx, SSL, or DNS again. It is the managed middle ground between “pay Notion per head” and “become a part-time sysadmin.”
The math is still the easy part. At ~$20 per seat on Notion Business, a five-person team is ~$100/mo. Flat $15/mo for unlimited users on your own server undercuts that the moment you are two or three people, and the gap only widens as you grow. You can browse the rest of the self-hosted app catalog if you want the same one-click treatment for other tools.
The bottom line
Notion’s per-seat model is fine until it is not, and “not” arrives around your second or third teammate. The open-source escape hatches are real in 2026: AFFiNE and AppFlowy for the full workspace feel, Outline and Docmost for team wikis, and SiYuan, Trilium, Notesnook, or Anytype for private personal knowledge. Read the license (Outline and Anytype are source-available, not classic open source) and be honest about the infrastructure each one wants. Run it on a raw VPS if you like tinkering, or on a managed flat-rate server if you would rather write docs than configure them. Either way, you stop paying per head.
FAQ
What is the best open-source Notion alternative in 2026?
AFFiNE is the strongest pick for a team that wants an all-in-one workspace (docs, whiteboards, and databases) under a genuine open-source license, and it is MIT-licensed for self-hosting with around 70,000 GitHub stars. For the most Notion-like page-and-database feel, AppFlowy (AGPL-3.0) is the closest clone. For a dedicated team wiki, Outline or the lighter Docmost work well. The best choice depends on whether you are replacing Notion’s docs, its databases, or its wiki, and whether you are solo or on a team.
Are all these Notion alternatives open source?
No, and this is the common trap. AFFiNE (MIT), AppFlowy (AGPL-3.0), Docmost (AGPL-3.0 core), SiYuan (AGPL-3.0), Notesnook (GPL-3.0), and Trilium/TriliumNext (AGPL-3.0) use OSI-approved open-source licenses. Outline uses the Business Source License 1.1 and Anytype uses a custom “Any Source Available License 1.0” – both are source-available, meaning you can read and self-host the code but the license adds restrictions. If avoiding lock-in is your goal, favor the OSI-licensed ones.
Is there a self-hosted version of Notion I can run on my own server?
Notion itself is closed and cannot be self-hosted, but several open-source alternatives can. AFFiNE, AppFlowy, Outline, and Docmost run as self-hosted server apps (they need a database like PostgreSQL, and most also need Redis), while SiYuan, Trilium, and Anytype are local-first and run with little or no backing infrastructure. The effort ranges from a single install to standing up Postgres, Redis, and object storage, so pick based on how much setup you want to own.
How much does self-hosting a Notion alternative cost?
The server itself is cheap: a small VPS runs roughly $5-10 per month and hosts unlimited users at a flat rate, versus Notion’s ~$10-20 per user per month. The hidden cost is your time to provision, secure, and maintain it. A managed option like InstaPods hosts AFFiNE for a flat $15/month on a Grow plan with SSL, DNS, and the reverse proxy handled for you, which is more than a raw VPS but removes the sysadmin work. Either way, self-hosting replaces per-seat billing with one predictable bill.
Which self-hosted Notion alternative is easiest to install?
SiYuan and Trilium (TriliumNext) are easiest: they install as a single app or a small Docker service with no separate database. Notesnook’s local app is just as simple, though its own self-hosted sync server is in alpha and needs a multi-service stack (MongoDB plus MinIO). AFFiNE and Docmost are medium effort because they each need PostgreSQL and Redis. Outline is the hardest to self-host, since it requires PostgreSQL, Redis, S3-compatible object storage (or local file storage), and an external authentication provider before it will run.
Does self-hosting AFFiNE give me unlimited users without per-seat fees?
Yes. AFFiNE is licensed MIT for self-hosting, so when you run it on your own server you are not billed per seat the way Notion charges. One server hosts your whole team at a flat cost, whether that is 3 people or 30. On a $15/month managed Grow plan or a cheaper VPS you manage yourself, adding teammates does not increase the bill, which is the core reason teams move off per-seat SaaS in the first place.
