BookStack
75 · StableWiki organized as shelves, books, chapters and pages, built on Laravel.
Directory / Wikis & knowledge base
Open source Wikis & knowledge base
Wiki.js
70 · StableNode.js wiki with Markdown and visual editors, Git sync and many auth providers.
Source-available and unverified licenses
The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.
Outline
72 · StableFast team knowledge base with real-time collaborative editing and Slack integration.
Directory / Wikis & knowledge base / Outline
Outline
Fast team knowledge base with real-time collaborative editing and Slack integration.
Will it still be around?
Health 72/100 · Stable
Activity, bus factor and issue responsiveness. Breakdown
Can a business use it freely?
Source-available, not open source
Business Source License 1.1 (Apache-2.0 after the change date). Details
Alternative to
Savings proposal
At 25 members, Notion costs about $250 a month and self-hosting Outline about $264, so Notion is cheaper at this size. Self-hosting pays off from 29 members.
List price: Notion Plus, billed annually. Business is $20 per member. Source, checked 2026-10-07.
Extra cost over 3 years
$1,704
Pays for itself
Not at this size
Extra cost in year one
$1,368
Each month
$250 → $264
Show as a table
| Month | Notion | Self-hosted | Difference |
|---|---|---|---|
| Today | $0 | $1,200 | −$1,200 |
| Month 3 | $750 | $1,992 | −$1,242 |
| Month 6 | $1,500 | $2,784 | −$1,284 |
| Month 9 | $2,250 | $3,576 | −$1,326 |
| Month 12 | $3,000 | $4,368 | −$1,368 |
| Month 18 | $4,500 | $5,952 | −$1,452 |
| Month 24 | $6,000 | $7,536 | −$1,536 |
| Month 30 | $7,500 | $9,120 | −$1,620 |
| Month 36 | $9,000 | $10,704 | −$1,704 |
Assumptions you can change
Self-hosting Outline usually means an app server, a database and a cache or worker. Hours are for one engineer; the server cost is a typical cloud VPS with backups and grows with the number of people using it.
Not included: paid editions or features of Outline (see What's free?), large data migrations, and compliance work. All amounts in US dollars at list price; your negotiated price may differ.
Health score: 72/100
Activity45% weight
100/100
- Last commit today (100/100).
- 2169 commits in the past 12 months (100/100).
- 18 releases in the past 12 months (100/100).
Bus factor30% weight
9/100
- Top contributor wrote 93% of the last 73 commits (past 12 months).
- 5 people authored those commits.
Responsiveness25% weight
96/100
- 99% of all issues are closed (35 open, 4281 closed) (100/100).
- 28 of 30 recent issues got a reply or were closed (93/100).
Score v2. How the health score works.
License
Business Source License 1.1 (Apache-2.0 after the change date) · Source-available, not open source
Free to use, including commercially, but you can't offer it as a hosted document service to third parties. Version 1.10.1 becomes Apache-2.0 on 2030-09-09.
The code is public, but the license restricts how you can use it, usually by banning competing hosted services or capping production use. Not open source.
License text checked 2026-10-07: read it.
What's free?
Enterprise features many open-core projects keep for paid plans.
| Feature | Self-hosted, free? |
|---|---|
| SSO (SAML) | Unknown |
| SSO (OIDC) | Unknown |
| SCIM provisioning | Unknown |
| Audit logs | Unknown |
| Role-based access control | Unknown |
| Multi-tenancy | Unknown |
We haven't verified which of these features are free for this project yet.
GitHub metrics
| Stars | 41k | Forks | 3.6k |
|---|---|---|---|
| Last commit | today | Commits, 12 months | 2.2k |
| Releases, 12 months | 18 | Last release | 28 days ago |
| Contributors | 250 | Active authors | 5 in last 73 commits |
| Open issues | 35 | Closed issues | 4.3k |
Funding: github
Snapshot from 2026-10-08.