An internal wiki is the place a company keeps the answers people would otherwise ask in chat: how to request time off, how the deploy works, which pricing deck is current, who owns the vendor contracts. Most teams can start one in an afternoon. The hard part comes later. Pages go stale, nobody knows who owns them, search returns three conflicting versions, and people drift back to asking in Slack.
This guide compares seven tools for teams setting up a company wiki in 2026: Confluence, Notion, Slite, Guru, Nuclino, Tettra and BookStack. Every price and feature below was checked on the vendors' own pricing pages and help docs in October 2026. Where a vendor does not publish something, we say so rather than guess.
What matters when choosing an internal wiki
Feature lists for wiki tools look alike. These are the points that actually separate them once the whole company is using one.
Structure and navigation. A wiki needs a shape people can browse without being told where things are. Confluence uses spaces with a page tree. BookStack uses shelves, books, chapters and pages. Notion uses teamspaces with nested pages and databases. Slite, Tettra and Nuclino are lighter, built around docs, categories and workspaces. Rigid structures are easier to keep tidy; flexible ones are easier to start and easier to turn into a maze.
Permissions. Sooner or later HR, finance or leadership will need pages that only some people can see. Check whether page-level permissions are on the plan you plan to buy, not just on the plan in the marketing headline. On Confluence's Free plan, for example, there are no space or page permissions at all, and on Notion private teamspaces start at Business.
Search and AI answers. Most of these tools now answer questions in plain language with citations to wiki pages. What differs is the plan you need, how many questions are included, and whether the AI can also read your other tools. Confluence includes Rovo AI on every paid plan with a monthly credit allowance; Notion includes its AI from Business up; Slite's Basic plan includes 30 AI questions per seat per month; Nuclino puts Sidekick AI on Business; Tettra includes AI answers on its one self-serve plan; BookStack has no AI features.
Keeping pages fresh. This is where wikis fail. Look for page owners, verification (a page marked as checked and still true, usually with an expiry), and reports that surface stale or unowned pages. Slite, Guru and Tettra are built around this. Notion has a verified badge on Business. Confluence has page owners on all plans and a stale-content filter for admins on Premium.
Slack and Microsoft Teams. If questions get asked in chat, the wiki should answer in chat. Guru and Tettra are built for this, Slite answers in Slack from your docs, and Confluence has official apps for both Slack and Teams. Check Teams support carefully: several tools here list Slack only.
Adoption. A wiki nobody opens is a cost, not an asset. A clean editor, fast search, and answers delivered where people already work matter more for adoption than any single feature.
Self-hosting. Some companies need the wiki on their own servers. BookStack is free, open source and self-hosted only. Atlassian also sells Confluence Data Center for self-managed setups through sales. The other tools here are cloud services.
Price at 10 and 50 people. Per-seat prices look small until you multiply them. We work out the bill for both team sizes, with the math, further down.
Confluence: full review
Confluence is Atlassian's wiki and the tool many companies picture when they hear "internal wiki". It earns the top pick here on the combination of structure, permissions, AI included in the price, chat integrations and a low annual price per user.
Structure and navigation. Content lives in spaces (one per team or topic), and each space has a structured page tree. Every plan includes databases, macros, page versioning, a template library and an employee directory. This hierarchy is the main reason Confluence holds up at company scale: new hires can browse the HR space or the engineering space without knowing a page title.
Permissions. Space and page permissions start on Standard. Standard also adds guests, public links and anonymous access. Guests are free (up to 5 per paid user), but each guest can only access one space at a time. Premium adds "inspect permissions", which helps admins see who can reach what, plus IP allowlisting. The Free plan has no space or page permissions and no guests, so it suits a small team where everyone can see everything.
Search and AI. Rovo AI (search, chat and agents) is included on every paid plan with a monthly allowance: 25 credits per user on Standard, 70 on Premium and 150 on Enterprise. Free has no Rovo.
Keeping pages fresh. Every page, live doc, whiteboard and database has an owner (the creator by default), and ownership can be transferred, by admins too, or by an automation rule. On Premium and Enterprise, space admins get a content manager that filters pages by "last active" (not viewed, updated or commented on in 7 days to 6 months) and by deactivated owners, then archives up to 500 items or reassigns owners of up to 100 at once. Standard includes page archiving and page insights. We did not confirm a formal "verified page" badge in Confluence Cloud, so teams that want explicit verification should look at Slite, Guru or Tettra.
Slack and Teams. The official Confluence Cloud app for Slack sends Confluence notifications to Slack, posts channel updates for chosen spaces and pages, shows link previews, and lets people like pages and reply to comments without leaving Slack. The Microsoft Teams app lets people create, edit and share Confluence pages inside Teams, add pages as tabs, get notified about edits, and search previously shared pages.
Pricing. Free is $0 for up to 10 users with 2 GB storage. Standard is $7.15 per user per month on monthly billing and Premium $14.10 (for 1 to 100 users). Annual billing is priced in user tiers: Standard costs $720 a year for 1-10 users and $3,600 a year for 26-50 users; Premium $1,400 and $7,100. SAML SSO and SCIM need a separate Atlassian Guard Standard subscription on Free, Standard and Premium (Atlassian's Guard page lists Guard Standard at $4.35 per user per month); Guard Standard is included on Enterprise, which is annual-only and quoted by sales.
Self-hosting. Atlassian sells Confluence Data Center for self-managed deployments with strict regulatory needs, through sales.
Who it is for. Companies of 10 people and up that want a wiki with a clear structure, real permissions, AI that comes with the seat price, and official Slack and Teams apps.
Limits. SSO costs extra below Enterprise. The stale-content tools are Premium. The Free plan lacks permissions and AI, so most companies will pay for Standard from day one.
Notion: full review
Notion is a flexible workspace where a wiki is one of many things a team builds, next to project trackers, meeting notes and docs. If the wiki should live alongside the rest of the team's work, Notion is the strongest option here.
Structure and navigation. Pages nest inside pages and live in teamspaces. Databases can turn a set of pages into a filterable directory (for example, all policies tagged by department). Open and closed teamspaces are available on all plans; private teamspaces need Business. The flexibility is the strength and the risk: without agreed conventions, a Notion wiki can sprawl.
Permissions. Permission groups and advanced teamspace permissions (override per person or group) are available, and guests only see pages they are invited to. Guests are free; Free allows 10, paid plans unlimited. Granular database (row-level) permissions, SAML SSO and domain verification are on Business. SCIM and the audit log are on Enterprise.
Search and AI. Notion's AI (Notion Agent, AI Meeting Notes, Research mode and Enterprise Search in beta) is included from Business up. Free and Plus get only a limited trial. Enterprise Search reaches into connected tools including Slack, Microsoft Teams and GitHub, with Jira, Box, OneDrive, Salesforce and Asana in beta.
Keeping pages fresh. Business adds "Verify any page", which shows a verified badge in search and in AI citations. Page analytics show viewers and views over time on all plans, and editors on Business.
Slack and Teams. Slack and Google Drive basic connections start on Plus. Microsoft Teams appears as an Enterprise Search source on Business.
Pricing. Free is $0. Plus is $10 per member per month billed annually ($12 monthly). Business is $20 annually ($24 monthly). Enterprise is custom. Page history runs 7 days on Free, 30 on Plus, 90 on Business and unlimited on Enterprise.
Migration. Notion imports from Confluence (Cloud and Server/Data Center), Evernote, Google Docs, Quip, Dropbox Paper and more. Confluence permissions are not imported; imported pages land private to the importer.
Who it is for. Teams that want the wiki, docs and lightweight project tracking in one tool and are willing to set conventions for structure.
Limits. The features a wiki needs most (verification, private teamspaces, SSO, included AI) are on Business, which doubles the per-seat price compared with Plus.
Slite: full review
Slite is a focused knowledge base for teams, and its entry plan includes more wiki-maintenance tooling than any other self-serve plan here.
Structure and navigation. Slite keeps structure light: unlimited docs on every plan, templates, and scheduled recurring docs (for example, a weekly update).
Permissions. Basic includes guest collaborators, user groups, doc permissions, protected doc editing and reader access on docs. Reader-only seats (people who read but are not billed as full users) are listed on Enterprise only.
Search and AI. Basic includes Ask, Slite's AI search and answers within Slite docs, with 30 questions per seat per month, and 30 AI edits per user per month. Pro adds Slite Agent with AI search across connected tools (Slite's search results page cites "20+ connected tools"), doc fact-checking with suggested fixes, custom assistants and 50 credits per seat per month.
Keeping pages fresh. This is Slite's strength. Basic includes doc verification, doc ownership, a Knowledge Management Panel with bulk actions, and doc insights. Pro's fact-checking goes further by suggesting fixes to outdated content.
Slack and Teams. Basic includes the Slack integration, with AI answers in Slack drawn from Slite docs. Microsoft Teams was not listed in the sources we read.
Pricing. There is no free plan, only a 14-day trial of Basic and Pro without a credit card. Basic is $10 per user per month billed annually ($12 monthly). Pro is $20 annually ($25 monthly). Enterprise is custom and adds SCIM, audit logs, HIPAA and migration support. Nonprofit and academic discounts are available on Basic.
Security. SOC 2 Type II on all plans, with production data hosted in the EU (Belgium). OpenID SSO is on Pro.
Who it is for. Teams of roughly 10 to 100 that care most about keeping pages verified and owned, and that work in Slack.
Limits. No free plan. The 30 AI questions per seat per month on Basic can run short in a busy team. SAML is not listed; SSO on Pro uses OpenID Connect.
Guru: full review
Guru positions itself as a knowledge platform with AI agents rather than a wiki you browse. It is aimed at larger companies that want trusted answers delivered in Slack, Teams and the browser.
Structure and navigation. Content sits in Collections, with collaborative editing, approval and templates.
Permissions. Role-based access controls, SAML SSO and SCIM. Answers and search are permission-aware, and content pulled from 100+ connected sources "inherits its original access controls".
Search and AI. Knowledge Agents give cited, permission-aware answers, and a Q&A skill and deep research run on governed knowledge.
Keeping pages fresh. Verification is central. Guru says its automated verification handles "~80–90% of verification automatically", with expert review workflows, auto-archival and cleanup, and knowledge health reporting. Its home page notes that Knowledge Agents can now verify and unverify information.
Slack and Teams. Slack and Microsoft Teams integrations are both listed, plus a browser extension with "knowledge triggers".
Pricing. Guru publishes no prices, plans, free plan or trial. It sells a tailored package (platform, an AI and knowledge management strategy team, and enterprise governance) through a sales call. Eligible 501(c)(3) nonprofits get reduced pricing through Guru for Good.
Security. SOC 2 Type II, HIPAA and GxP compliance are listed, with DLP masking and centralized audit logs. Guru states that your data never trains its AI models.
Who it is for. Mid-size and large companies, especially support, sales and operations teams, that need verified answers in Slack and Teams and want a vendor team to help with rollout.
Limits. No self-serve option, so you cannot compare its cost with the others without a quote. It is more than a small team needs.
Nuclino: full review
Nuclino is a lightweight, fast wiki that keeps the feature set small on purpose. For small teams that want something simple and cheap, it is a strong fit.
Structure and navigation. Content is organized into workspaces of items, with list, board, table and graph views on every plan. The graph view shows how pages link to each other.
Permissions. Starter adds admin, member and guest roles, comment-only and read-only roles, groups, and private and default workspaces. Note that every user counts toward the bill, including guests and read-only members.
Search and AI. Sidekick AI (ask questions of your content, draft and edit, generate images) is on Business.
Keeping pages fresh. Nuclino's sources we read list version history (30 days on Starter, unlimited on Business) and team insights on Business, but no verification or page-owner feature, so freshness depends on team habits.
Slack and Teams. Integrations "such as Slack and Google Drive" are listed on all plans. Teams was not listed.
Pricing. Free covers up to 50 items, 3 canvases and 2 GB of storage, with no version history. Starter is $6 per user per month billed annually ($8 monthly). Business is $10 annually ($12 monthly) and adds Sidekick AI, audit log, SAML SSO and advanced security controls. There is a 14-day Starter trial, and teams over 100 users can ask for volume pricing.
Security. ISO 27001, ISO 27018 and SOC 2, AES-256 at rest.
Who it is for. Small and mid-size teams that want a clean, quick wiki with roles and private workspaces at a low price.
Limits. No verification or ownership features. The Free plan's 50-item cap is a trial in practice. Guests are billed as users.
Tettra: full review
Tettra is still sold in 2026 and is still an internal knowledge base, now marketed as "AI-powered knowledge management". It is built around Slack: people ask in Slack, Tettra answers from the wiki, and teammates can request pages that are missing.
Structure and navigation. Pages are grouped in categories, with a Q&A area for questions and answers.
Permissions. Guest users, read-only users, invite-only categories, page locking and group permissions are listed. SAML SSO and SCIM are a paid add-on on the Scaling plan (price not published) and included on Enterprise.
Search and AI. Scaling includes AI answers, AI page tagging, AI FAQ generation and training on Google Docs.
Keeping pages fresh. Verification, page requests, a stale pages report, an unowned content report and a public content report are all on Scaling, along with unlimited version history. That is a full freshness toolkit on the entry plan.
Slack and Teams. Slack is the core: sign in with Slack, Slack notifications, AI answers in DMs and channels, AI thread summaries and mining existing answers from Slack. Tettra's integrations page lists Slack, Google Workspace, GitHub and Zapier. Microsoft Teams is not listed, so Teams-based companies should look elsewhere.
Pricing. There is no free plan, only a 30-day trial with no credit card. Scaling is $8 per user per month billed annually or $10 billed monthly, with a 10-user minimum. Enterprise is custom, with discounted rates past 250 licenses and custom import and onboarding. Nonprofit and education discounts are available through sales.
Who it is for. Slack-first companies of 10 to a few hundred people whose main goal is cutting repeat questions in chat.
Limits. No Teams integration listed. SSO costs extra on Scaling. The pricing page names no security certifications, and its security overview page did not load when checked, so ask for compliance documents if you need them. The app interface is English-only.
BookStack: full review
BookStack is a free, open-source wiki you install on your own server. For companies that need the wiki inside their own infrastructure, it is the clearest option on this list.
Structure and navigation. Content is organized as books, chapters and pages, and books can be grouped on shelves. Pages can be sorted across books, and you can link to any paragraph. The editor is WYSIWYG, with an optional Markdown editor with live preview and built-in diagrams.net drawing.
Permissions. A full role and permission system lets admins lock down content and actions. Login options include email and password, OIDC, SAML2, LDAP and social logins, and multi-factor authentication (TOTP and backup codes) can be enforced per role. The whole instance can also be made publicly viewable.
Search and AI. Full-text search across all books or within one book. The BookStack site mentions no AI features.
Keeping pages fresh. Page revisions are built in, and the API includes an audit log. The sources we read do not list page owners, verification or stale-page reports.
Slack and Teams. There is no native Slack or Teams app. BookStack sends outgoing webhooks with a "Slack compatible" payload, which its docs say Discord, Zulip and Teams can accept, so you can post page updates to a channel. There is also a REST API.
Pricing. The software is MIT-licensed and free, in one edition with every feature; the project says it does not and will not offer an enterprise version. It also does not offer official hosting, so you pay for your own server (BookStack says it can run on a £2.50 IONOS VPS) and your time to maintain it. Optional paid support comes from HTTP Functions Ltd: a Professional Support Plan at £450 a year and an Enterprise Support Plan at £4,500 a year (prices in GBP, VAT not included).
Who it is for. Companies with someone comfortable running a PHP application and database (PHP 8.2+, MySQL 8.0+ or MariaDB 10.6+) that want a free, self-hosted wiki with enterprise login options.
Limits. You handle hosting, updates, backups and security patches yourself. No AI answers, no verification workflow, and no native chat apps.
Pricing comparison: what a wiki costs for 10 and 50 people
All figures use the vendors' published prices. Annual means the per-month rate on yearly billing. Guru is excluded because it publishes no prices.
10 people
| Tool and plan | Annual billing | Monthly billing |
|---|---|---|
| Confluence Free | $0 (10-user limit, no permissions or AI) | $0 |
| Confluence Standard | $720/year (tier price for 1-10 users) | 10 x $7.15 = $71.50/month |
| Confluence Premium | $1,400/year | 10 x $14.10 = $141.00/month |
| Notion Plus | 10 x $10 x 12 = $1,200/year | 10 x $12 = $120/month |
| Notion Business | 10 x $20 x 12 = $2,400/year | 10 x $24 = $240/month |
| Slite Basic | 10 x $10 x 12 = $1,200/year | 10 x $12 = $120/month |
| Slite Pro | 10 x $20 x 12 = $2,400/year | 10 x $25 = $250/month |
| Nuclino Starter | 10 x $6 x 12 = $720/year | 10 x $8 = $80/month |
| Nuclino Business | 10 x $10 x 12 = $1,200/year | 10 x $12 = $120/month |
| Tettra Scaling | 10 x $8 x 12 = $960/year | 10 x $10 = $100/month |
| BookStack | $0 license, plus your hosting | $0 license |
At 10 people, Confluence Standard and Nuclino Starter tie at $720 a year on annual billing ($6.00 per user per month). Confluence Standard includes AI credits and page permissions at that price; Nuclino Starter has no AI. Tettra's 10-user minimum means a team of 6 still pays for 10.
50 people
| Tool and plan | Annual billing | Monthly billing |
|---|---|---|
| Confluence Standard | $3,600/year (tier price for 26-50 users) | 50 x $7.15 = $357.50/month |
| Confluence Premium | $7,100/year | 50 x $14.10 = $705.00/month |
| Notion Plus | 50 x $10 x 12 = $6,000/year | 50 x $12 = $600/month |
| Notion Business | 50 x $20 x 12 = $12,000/year | 50 x $24 = $1,200/month |
| Slite Basic | 50 x $10 x 12 = $6,000/year | 50 x $12 = $600/month |
| Slite Pro | 50 x $20 x 12 = $12,000/year | 50 x $25 = $1,250/month |
| Nuclino Starter | 50 x $6 x 12 = $3,600/year | 50 x $8 = $400/month |
| Nuclino Business | 50 x $10 x 12 = $6,000/year | 50 x $12 = $600/month |
| Tettra Scaling | 50 x $8 x 12 = $4,800/year | 50 x $10 = $500/month |
| BookStack | $0 license, plus hosting | $0 license |
What stands out at 50 people:
- Confluence Standard is the cheapest paid plan with AI included, at $3,600 a year, which is $3,600 / 50 / 12 = $6.00 per user per month. Monthly billing at 50 users costs $357.50 x 12 = $4,290 a year, so annual billing saves $690.
- The comparable "wiki with verification and AI" plans are Slite Basic at $6,000 a year, Tettra Scaling at $4,800 and Notion Business at $12,000. Notion Plus ($6,000) lacks verification and included AI.
- SSO changes the math. SAML SSO is included on Notion Business and Nuclino Business. On Confluence it needs Atlassian Guard; on Tettra Scaling it is a paid add-on; Slite Pro includes OpenID SSO.
- BookStack costs nothing to license at any size. If you want the project's paid support, the Professional plan is £450 a year whether you have 10 users or 50.
How to choose
Work through these questions in order.
- Must the wiki run on your own servers? Choose BookStack if you have someone to run it, or ask Atlassian about Confluence Data Center.
- Is your company on Microsoft Teams? Confluence has an official Teams app, Guru lists Teams, and Notion can search Teams on Business. Tettra, Slite and Nuclino list Slack, not Teams, in the sources we read.
- Is stale content your biggest worry? Slite (verification and owners on Basic), Tettra (verification and stale and unowned reports on Scaling) and Guru (automated verification) are built for it. Notion's verified badge needs Business, and Confluence's stale-content filter needs Premium.
- Do people mostly ask questions in Slack? Tettra and Slite answer in Slack from your wiki on their entry plans. Guru does this at enterprise scale.
- Should the wiki live next to projects and docs? Notion, if you will pay for Business to get verification, private teamspaces and AI.
- Do you want the lowest cost for a structured wiki with permissions and AI? Confluence Standard on annual billing.
- Do you just want something small, quick and cheap? Nuclino Starter.
A practical rollout tip that applies to every tool: assign an owner to each top-level space or category before launch, seed the wiki with the 20 questions people ask most often, and point people to the wiki (or the wiki's chat bot) every time those questions come up in chat.
Conclusion
For most companies setting up an internal wiki in 2026, Confluence is the safest choice. It has the clearest structure (spaces and a page tree), real space and page permissions on Standard, Rovo AI included in every paid plan, official Slack and Microsoft Teams apps, and the lowest annual cost per user among paid plans with AI: $720 a year for 10 users and $3,600 a year for 50. Budget for Atlassian Guard if you need SSO, and for Premium if you want the stale-content tools.
Pick Slite or Tettra if keeping pages verified and answering questions in Slack matters more than deep structure. Pick Notion if the wiki is part of a wider workspace and Business fits the budget. Pick Guru for verified AI answers across Slack and Teams in a larger company. Pick Nuclino for a simple, cheap wiki, and BookStack when the wiki must run on your own servers.
Sarah Chen