A knowledge base fails when employees find a plausible answer but cannot tell whether it is current, approved, or intended for them. Publishing more pages can make that problem worse. The purchasing decision should start with who writes the knowledge, who verifies it, and whether the audience consists of staff, customers, developers, or several distinct groups.
Confluence, Guru, Slab, Document360, and GitBook offer different approaches to authoring, organizing, finding and publishing knowledge. They overlap, but they are not identical substitutes. This comparison uses current official product and pricing material checked on October 7, 2026. Recommendations describe audience and workflow fit; they do not assign invented accuracy scores to search or AI answers.
Choose an audience and a source of authority
Separate collaborative working documents from approved procedures and public documentation. A project note can change freely; a customer instruction may need a deliberate release process. Identify which information should live in the knowledge base and which should remain in another authoritative system with a clear link or connector.
Also separate knowledge publishing from ticket handling. Our help desk comparison covers support queues and agent workflows. A knowledge platform can help people find answers, but it does not remove the need to handle exceptions or assign ownership when the published answer is wrong.
The quick difference
| Product | Best fit | Main strength | Boundary to check |
|---|---|---|---|
| Confluence | Teams collaborating within Atlassian work | Shared pages and organized workspaces | Permissions, guest scope and cloud subscription tier |
| Guru | Organizations governing knowledge across tools | Verified knowledge and connected answers | Custom platform and implementation proposal |
| Slab | Teams building an internal knowledge habit | Focused authoring, topics and unified search | Users, history, guests and higher-tier controls |
| Document360 | Teams managing internal or customer documentation | Editor workflow and published knowledge sites | Project, reader, AI and plan scope |
| GitBook | Teams publishing product and technical documentation | Collaborative docs with a publishing workflow | Site charges, users, AI credits and audience access |
Confluence
Confluence organizes collaborative content into pages and spaces, with additional structures such as databases and whiteboards. It is a relevant candidate when the team already manages work in the Atlassian environment and wants project context and enduring documentation to remain close together.
The current cloud Free plan supports ten users and 2 GB of storage. Standard adds more granular permissions, 250 GB of storage and guest access; the pricing page describes up to five free guests per paid user. Premium expands the collaboration and administration offering. Monthly and annual subscriptions use different commercial models, and the displayed rate depends on the selected team size.
Strength: shared knowledge within an existing work environment. Tradeoff: a flexible workspace still needs editorial boundaries. Decide which spaces hold draft work and which contain approved guidance. Pilot a restricted procedure and a guest collaboration case, then inspect the exact permissions. Do not assume an externally shared page provides the same audience control as a complete customer documentation site.
Guru
Guru’s current offer emphasizes a governed knowledge layer across connected tools, verification workflows, and permission-aware answers with citations. Its pricing page also includes implementation expertise, such as knowledge architecture, integration setup and ongoing optimization. That makes the buying decision broader than subscribing to a simple page editor.
The commercial model is now tailored to organizational scale, knowledge complexity and AI maturity, rather than a universal public per-seat amount. Older seat-based prices should not be presented as the current proposal. Ask the team to scope platform access, integration work, support, currency, term and any usage-related conditions explicitly.
Strength: governing knowledge that spans several existing systems. Tradeoff: success depends on defining authority and connector access. During a pilot, provide an outdated answer beside an approved replacement and ask how verification changes the retrieved result. Repeat the question as users with different permissions. Inspect the cited source and correction workflow; an attractive answer alone cannot demonstrate that the knowledge process is reliable.
Slab
Slab centers on internal knowledge authoring, topics, collaboration and unified search. Its focused structure is worth evaluating when a team wants a maintainable internal wiki without turning every page into a broader project-management workspace. Integrations can help connect the written knowledge to material already stored elsewhere.
The current Free plan supports up to ten users, unlimited posts and topics, and ninety days of version history. Startup lists $6.67 per user per month billed annually and 365 days of history; Business lists $12.50 under annual billing with unlimited history. Confirm currency and monthly alternatives at checkout. Guest allowances and attachments also differ by plan.
Strength: a clear internal writing and discovery workflow. Tradeoff: check the controls needed as the knowledge base becomes sensitive or larger. The pricing matrix separately lists private topics, verification, identity controls and audit logs; confirm availability in the chosen tier rather than interpreting the full feature list as universal. Ask a new employee to find an onboarding answer and its owner without guidance from the writer.
Document360
Document360 distinguishes the editor portal from the knowledge site used by readers. Its current material covers internal and external knowledge bases, software documentation, reusable content, review workflows, and customization. This makes it relevant when writing, reviewing and publishing instructions should follow a deliberate process.
The current pricing destination invites a tailored commercial conversation and does not provide a reliable universal numerical amount in the retrieved view. Request a package scoped to projects, editors, reader access, storage, languages and relevant AI functions. A feature advertised across the platform is not enough evidence that the proposed subscription includes it.
Strength: coordinating the documentation lifecycle and the reader experience. Tradeoff: the intended audience must be explicit. Pilot one public article and one restricted procedure, including a review and later correction. Check how reusable content updates appear across published pages and who approves them. For customer guidance, have a reader search for a task using their own phrasing and identify where they can ask for help when the article is insufficient.
GitBook
GitBook combines collaborative documentation with a published-site experience and Git-related workflows. Its current product direction also describes knowledge delivery to AI tools. For a buyer, the useful starting point remains the documentation workflow: who changes a page, how the change is reviewed, and what readers see after publication.
The pricing calculator separates site plans, additional users and AI credits. The retrieved page’s calculator uses Essential and Ultimate naming, while parts of the feature matrix still refer to Premium. This guide therefore does not translate that mixed labeling into a guaranteed tier entitlement or quote. Obtain a confirmed package before budgeting several sites and collaborators.
Strength: publishing product and technical knowledge with an explicit content workflow. Tradeoff: site access, author access and consumption are different boundaries. Pilot a reviewed documentation change and a versioned audience scenario. Confirm custom-domain requirements, restricted-reader authentication, user charges and included AI usage separately. Ask how content can be exported if the publishing arrangement changes later.
How to evaluate knowledge quality and fit
Pick one high-value question. Use a task people currently ask about repeatedly, such as onboarding a contractor or configuring a product feature. Give each shortlisted service the same small body of approved material. Ask a reader to find the answer and identify its authority. This reveals more than importing hundreds of pages without a content plan.
Demonstrate a correction. Change a procedure, mark the old answer as outdated, and trace the reader experience. Does search surface the revised material? Can the owner identify other pages that need adjustment? For an AI answer, inspect the citation and whether the response reflects the current approved version. Treat this as a pilot to run, not a capability assumed from marketing language.
Test audience boundaries. Create staff-only, partner-only and public examples appropriate to your organization. Use separate pilot accounts to verify that the intended material is discoverable and restricted material remains inaccessible. Check both the page and search experience. A public-link feature, authenticated portal and internal wiki can serve different needs even when all contain the same words.
Budget for maintaining knowledge. Count writers, reviewers, readers, sites, projects and any metered AI use according to the vendor’s terms. Separate subscription cost from migration and governance work. Assign an owner to every important topic and an achievable review cadence. A platform can support verification, but it cannot decide who is accountable for a procedure when the underlying business process changes.
Selection checklist
- Identify the audience, approved sources and responsible topic owners.
- Publish, review and correct one representative procedure.
- Check search results and any AI citations after the correction.
- Verify staff, partner and public access with separate accounts.
- Confirm sites, editors, usage, exports, currency and contract scope.
Choose for the knowledge lifecycle
Consider Confluence for collaborative Atlassian work, Guru for governed knowledge across connected systems, and Slab for a focused internal wiki. Shortlist Document360 for deliberately managed internal or customer documentation, and GitBook for product and technical publishing workflows. Choose according to who must write, verify and use the answer; the volume of available features is secondary to a sustainable content process.