Wiki software lets a team write, link and edit shared pages, so internal knowledge lives in one searchable place. The choice splits two ways, as of Oct 2026: open-source wikis you install and run yourself, and hosted team wikis and knowledge bases that a provider runs for you, many now with AI answers built in. Ten follow in no particular order.
Most teams start a wiki after the third time someone asks where a document lives. The hard part isn't writing pages, it's deciding who runs the thing and how you'll keep it current once the first burst of enthusiasm fades.
The ten options below are listed alphabetically and in no particular order. Each description comes from the product's own website, as of Oct 2026.
Wiki and knowledge base software compared
| Tool | Type | Good for |
|---|---|---|
| Bloomfire | Enterprise AI knowledge platform | Governed company knowledge for people and AI |
| Document360 | AI knowledge base for documentation | Internal docs, SOPs and user manuals |
| Guru | Governed knowledge layer | Verified answers inside your workflow |
| MediaWiki | Free, open wiki software you install | Running a large public or internal wiki |
| Slab | Knowledge base and wiki software | A simple wiki for the whole company |
| Slite | Self-maintaining AI knowledge base | Docs kept in sync with your tools |
| Tettra | AI internal knowledge base | Answering teammates' questions in Slack |
| TiddlyWiki | Personal web notebook | A non-linear notebook of your own |
| Wiki.js | Open-source wiki on Node.js | A wiki you run with a full admin area |
| XWiki | Open-source enterprise wiki | Knowledge bases, intranets and wiki apps |
Ten wikis and team knowledge bases
Bloomfire
Best for: Large organisations wanting an app to author, curate, search and engage with company knowledge, with an API-first engine feeding answers to AI tools.
Document360
Best for: Teams writing internal knowledge bases, SOPs, user manuals and product documentation who want AI built in and imports from Confluence, Word or Google Docs.
Guru
Best for: Companies that want their knowledge structured and checked so every AI tool and every person gets answers they can trust, with agents that verify information.
MediaWiki
Best for: Organisations wanting free, open wiki software they download, install and configure themselves, to collect and organise knowledge for people.
Slab
Best for: Companies wanting to create, organise and discover knowledge for everyone from non-technical to tech-savvy staff; the page names a free plan for small teams.
Slite
Best for: Teams wanting an AI knowledge base whose agent watches Slack, Linear, GitHub and the codebase to flag docs that have drifted out of date.
Tettra
Best for: Support, HR and operations teams that answer the same questions in Slack, with an AI bot searching the knowledge base and experts verifying key pages.
TiddlyWiki
Best for: Individuals who want a non-linear personal web notebook rather than a shared team wiki.
Wiki.js
Best for: Technical teams wanting open source wiki software on Node.js, with an extensive admin area and full control over the wiki's look, including dark mode.
XWiki
Best for: Organisations wanting an open source enterprise wiki for a knowledge base, collaborative intranet, public website or business applications, developed in Java.
Run your own wiki, or let someone host it?
The product pages split cleanly. MediaWiki says it's used by tens of thousands of websites and that it powers Wikipedia. XWiki calls itself an open source enterprise and application wiki, Wiki.js lets you manage all aspects of your wiki from its admin area, and TiddlyWiki describes itself as a non-linear personal web notebook. The first three are open source projects you set up and look after yourself, and the fourth is a personal notebook rather than a team wiki.
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On the hosted side, Slab is knowledge base and wiki software, Slite a self-maintaining AI knowledge base, Tettra an AI internal knowledge base and knowledge management tool, and Document360 AI knowledge base software for documentation. Bloomfire and Guru now describe themselves as governed knowledge for enterprise AI, which is a bigger job than a team wiki. So the real decision isn't which wiki has the most features. It's whether you want to run it yourself or have someone else run it.
What changes when you host a wiki yourself
- Control. You decide where the data sits, who can see it and how it's backed up.
- Upkeep. Someone on your team installs updates, fixes problems and keeps the server running. One open-source project even points you to hosting services if you don't own a server.
- Editing. Try the editor with your least technical colleague before you commit, because a wiki nobody edits goes stale fast.
- AI features. Several hosted products now build AI into the knowledge base, such as bots that answer questions in Slack or agents that flag docs that have drifted out of date.
- Moving later. Check export options early. Getting pages out matters as much as getting them in.
Questions for your team before you pick a wiki
- Who will own the wiki and keep it current?
- Do you have someone who can run and update a server?
- Is it for internal notes, customer-facing help, or both?
- Does it need to connect to Slack or the other tools your team lives in?
- How will you know when a page is out of date?
- Can you export everything if you switch later?
Weighing up the big names too? My comparison of Notion alternatives covers more options for team notes.
Do you make wiki or knowledge base software? Tool makers can ask to be considered for a featured place on this list.
My plain advice on choosing wiki software
Decide who's going to run it before you compare features. If you've got a technical team that wants full control of the data, an open-source wiki you host yourself is a sensible route. If nobody wants to manage a server, a hosted team wiki gets you writing on day one. And if your problem is keeping pages accurate, look at the hosted tools that check for out-of-date content. Whatever you pick, give one person the job of keeping it tidy.
If you'd rather have a dedicated help centre, my list of knowledge base software goes deeper on that side.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
What is wiki software?
It's software for writing and linking shared pages that anyone with access can edit, so a team's knowledge lives in one searchable place.
What's the difference between a wiki and a knowledge base?
A wiki is usually open for the whole team to edit. A knowledge base is often more structured and may be written for customers as well as staff, though many products now do both.
Is there free wiki software?
Yes. Some open-source wikis are free to download and run yourself, and at least one hosted product here names a free plan for small teams. Hosting and upkeep still take time.
Should I host my own wiki?
Only if someone on your team can install updates and look after the server. If not, a hosted wiki is less work.
Can a wiki connect to Slack?
Some can. At least one product on this list answers teammates' questions in Slack using AI that searches your content.
How do I keep a company wiki up to date?
Give each section an owner, review the important pages on a schedule, and use any built-in checks for stale content. Several hosted tools here now flag pages that need a review.
