Best Knowledge Base Software in 2026

Confluence is the team workspace and wiki made by Atlassian, sold as a cloud product alongside Jira and the rest of the Atlassian portfolio. It organises content into spaces and page trees, with templates for meeting notes, requirements, runbooks and decision logs, and page-level restrictions for sensitive material. Atlassian sells it in Free, Standard, Premium and Enterprise editions; the free edition is offered for up to 10 users without a credit card.

Atlassian's AI layer for Confluence is Rovo, announced on 1 May 2024 as a combination of search across Atlassian and third-party tools, a conversational chat over company data and configurable agents that can be triggered by events such as a new Jira issue. The current pricing page lists Rovo Search, Chat and Agents among the features of the paid plans.

Confluence's main advantage as a knowledge base is the depth of its integration with Jira, which makes it the default documentation layer for many software and IT teams. Its limitations are the opposite side of that strength: page trees can sprawl without governance, the free plan is capped at 2 GB of file storage, and features such as higher uptime commitments and data residency are reserved for upper tiers. Confluence is also an internal wiki first; companies that need a branded public help centre often pair it with a dedicated external knowledge base tool.

Notion is a connected workspace made by Notion Labs, Inc., which is based in San Francisco with offices in other countries. It combines documents, databases, project tracking and wikis in one block-based editor, which is why many companies use it as an internal knowledge base without buying a separate tool. Its wiki product page describes page verification to show whether information is current, granular permissions and an AI search feature that returns answers with citations, and shows logos from OpenAI, Figma, Volvo and Nvidia.

Notion's pricing distinguishes clearly between plans for knowledge-base use. The free plan keeps only seven days of page history and limits blocks for workspaces with two or more members, while the ability to verify any page, SAML single sign-on, private teamspaces and 90-day page history arrive on the Business plan. Business also includes Notion Agent, AI Meeting Notes and Enterprise Search (beta), whereas the Free and Plus plans include only a trial of Notion AI.

The product has shifted heavily towards AI agents: Notion's release notes from mid-2026 describe agent skills, sub-agents, MCP connections to more than 150 tools and a new credit system. The flexibility that makes Notion attractive is also its main weakness as a knowledge base: without a deliberate structure, wikis mix with project pages and personal notes, and governance features such as audit logs and SCIM provisioning require Enterprise.

Guru is made by Guru Technologies, Inc., based at Independence Mall in Philadelphia, Pennsylvania. Its about page names Rick Nucci (co-founder and chief executive) and Mitch Stewart (co-founder and chief technology officer), and lists Firstmark, Thrive Capital, MSD Capital, Slack, Emergence and Accel as investors. Guru announced a US$30 million Series C round led by Accel in April 2020.

Guru began as a verified-knowledge tool for support and sales teams and now positions itself as an AI knowledge layer that sits across other company systems. Its product page describes answers with citations, permission-aware AI that respects user roles, content that is automatically verified as usage grows and Knowledge Agents that can verify and unverify information. Answers can be delivered inside Slack. Shopify, SeatGeek, Lemonade and TravelPerk are named in case studies, and the company lists SOC 2 Type 2 and HIPAA readiness.

Guru no longer publishes prices. Its pricing page describes a tailored investment covering platform access, solution engineers, knowledge architecture design and optimisation reviews, with governance features including SSO, SCIM, role-based access, audit logs and DLP masking; no free trial is listed. That makes it a fit for mid-sized and large organisations with a defined knowledge-management programme, and a poor fit for small teams wanting to start on a card.

Document360 is a knowledge base platform owned by Kovai.co, a software company headquartered in London whose team of more than 290 people is split between London and Coimbatore, India; Kovai.co also makes BizTalk360 and Turbo360. Document360 targets both customer-facing help centres and internal knowledge bases, as well as product and API documentation.

Its AI features are grouped under the Eddy AI brand, covering AI search, an AI chatbot and an AI writing agent, and the product lists localisation for multilingual knowledge bases and an API documentation solution. The homepage names McDonald's, the NHS, Virgin Red, HP, Puma and Samsung Ads among users, and lists SOC 2 and ISO 27001:2022.

Document360 moved to fully quote-based pricing. Its pricing page explains that quotes depend on the number of team accounts (editors and reviewers), workspaces, languages, SSO and security needs, the privacy model of the knowledge base (public, private or mixed) and use of the AI Premium Suite. Each project is a complete knowledge base with its own users, custom domain, branding and readers. The AI chatbot and the AI Premium Suite items, such as screen capture, step-by-step guides, interactive demos and video recording, are listed as add-ons. The absence of a public price list is the main drawback for smaller buyers comparing options.

Zendesk is a customer service software company headquartered in San Francisco. A consortium led by Hellman & Friedman and Permira completed its acquisition of Zendesk on 22 November 2022 in an all-cash deal valuing the company at about US$10.2 billion, after which Zendesk became privately held. Its knowledge base, historically sold as Zendesk Guide, is now delivered as the help centre within Zendesk Suite plans.

The help centre combines public and restricted articles, AI-assisted search and a knowledge builder that analyses historical tickets and drafts articles for administrators to review and publish. Its main appeal is the link between the knowledge base and the ticketing system: articles feed AI agents and agent-assist features, and search results and ticket deflection can be measured in one place. Named users on the help-centre page include New Look and Arbor Education.

On the pricing page, Suite Team includes one help centre in one default language with basic themes, while Suite Professional raises this to up to five help centres, more than 40 languages, custom user segments for article permissions and custom or Marketplace themes; the entry-level Support Team plan lists no help centre in its comparison table. Zendesk is therefore a strong choice for support organisations, but an expensive one if the only requirement is an internal wiki, since it is priced per agent as part of a service suite.

Helpjuice is a knowledge base vendor operating since 2011. It describes itself as a remote-first company and a registered US corporation. Unlike most tools on this list, it charges a flat monthly fee for a user band rather than per seat, which makes costs predictable for organisations with many contributors.

The product supports both internal and customer-facing knowledge bases. Its homepage lists a kanban-style planner for knowledge-base topics, support for more than 50 languages, content restrictions by user or group, AI search, the Swifty AI chat, AI article generation and step-by-step tutorial creation, plus analytics on what readers search for and which articles they use. A Chrome extension provides search from the browser. Helpjuice lists SOC 2 and GDPR, and names customers including Virgin Mobile, ZoomInfo, Shipt, Upstart and Appcues.

Pricing starts at $249 per month for the Knowledge Base plan with 30 users and 12 GB of storage, but that plan excludes the AI Suite. The AI-Knowledge Base plan at $449 per month adds SSO and the AI Suite for 100 users, and the Unlimited plan at $799 per month removes the user cap. The entry price is high for very small teams, and SSO is not available on the base plan. A 14-day trial with full access and no credit card is offered.

GitBook is a documentation and knowledge platform aimed primarily at technical teams. Its about page says it is used by more than two million people and names Zoom, FedEx, Nvidia, Snyk and Google among users. Its defining feature is Git Sync with GitHub and GitLab, which lets engineering teams keep documentation in a repository while non-technical colleagues edit in a block-based editor; change requests, preview deployments and auto-generated API documentation are included even on the free plan.

GitBook prices per published site plus per user. The free plan includes one user and unlimited page views but no custom domain, real-time collaboration or AI Assistant. Essential adds a custom domain, team invites, review and approval workflows, PDF export and US$20 of AI credits per month; Ultimate adds AI Assistant chat, the GitBook Agent, authenticated access, adaptive content and channels for Slack, Linear and GitHub, with US$100 of monthly AI credits. SAML SSO is reserved for Enterprise.

GitBook is well suited to public product documentation, developer portals and engineering handbooks. It is less suited to a company-wide internal wiki for non-technical staff, because pricing combines site and per-user fees and single sign-on requires an Enterprise contract. AI usage beyond the included credits is billed at US$0.01 per credit.

Slab is an internal knowledge base and wiki founded in 2016 and run as a fully remote company. Its about page names Asana, Fivetran and Vox Media among the companies that use it as a source of truth. Slab concentrates on the internal-wiki use case: posts organised into topics, a clean editor, content verification and a unified search that also covers content held in connected tools.

Slab's free plan is unusually complete. It supports up to 10 users with unlimited posts and topics, real-time collaboration, verification, unified search, AI capabilities, single sign-on and 10 standard integrations, though attachments are limited to 10 MB and version history to 90 days. The Startup plan at $6.67 per user per month (billed annually) removes the user cap and adds private topics, AI Autofix and a year of version history; Business at $12.50 adds custom domains, AI Ask and AI Predict, SAML SSO, SCIM, a GraphQL API, webhooks and an uptime SLA. Enterprise requires at least 100 users.

Slab's limitations are scope and extensibility. It does not offer the public help-centre features of Document360 or Zendesk, and premium integrations are capped on Business. Monthly prices are not displayed on the pricing page. The Startup plan is free for qualifying non-profit and educational users, and the company offers a 30-day money-back guarantee.

Slite was founded in 2017 to build a knowledge base for teams. Its about page names Christophe Pasquier as chief executive and Pierre Renaudin as chief technology officer, and lists Spark Capital, eFounders, Index Ventures and Y Combinator as backers. The product has repositioned from a collaborative notes tool towards an AI-first knowledge base built around answering questions from company documentation.

Every paid plan includes Ask, Slite's AI search and answer feature, together with a doc verification workflow, a Knowledge Management Panel for finding stale or ownerless content and access through MCP and an API. The Pro plan adds the Slite Agent, search across connected tools, fact-checking of documents with suggested fixes, agent workflows, OpenID SSO and a custom domain for public docs, with 50 AI credits per seat per month pooled across the workspace. Enterprise adds reader-only seats, audit logs, SCIM and an SLA.

Slite has no free plan: a 14-day trial with 500 shared credits precedes a paid subscription, and only annual per-user prices are displayed. Teams that make heavy use of agent features may need credit top-ups at $10 per 100 credits. Read-only seats, which matter for large organisations where most employees only consume knowledge, are available only on Enterprise.

Help Scout is a customer support software company founded in 2011 by Nick Francis, Denny Swindle and Jared McDaniel. It is fully remote, with staff working from more than 115 cities, and says its products serve more than 12,000 customer-facing teams. Its knowledge base product, Docs, is included with the shared inbox rather than sold separately.

Docs sites are public or restricted help centres with custom branding through preset options or custom CSS, contact forms and restricted sites controlled via the API. The number of Docs sites grows with the plan: one on Free, two on Standard, three on Plus and five on Pro, with extra sites available as add-ons. Help Scout's AI features draw on Docs content: Envoy answers customers from knowledge base content and is billed per resolution, and AI Drafts uses help content to draft replies.

The free plan includes five users, one inbox and one Docs site but caps Docs at 10 articles, so it is a trial of the knowledge base rather than a usable one. Paid plans are priced per user, which makes Help Scout economical for small support teams and less so as a company-wide wiki. The pricing page shows a 16% saving for annual billing without clearly labelling which period the headline prices reflect.

Tettra is an internal knowledge base designed around Slack. Its pricing page lists AI answers, AI page tagging, AI FAQ generation, training on Google Docs content and AI answers and thread summaries inside Slack, alongside page requests, verification and reports on stale and unowned content. Its about page features case studies from Techstars, Fortnox and SmartBug.

The product suits companies whose questions arrive in Slack channels: answers can be drawn from Tettra pages, and gaps become page requests assigned to subject experts. Unlimited storage and version history, Zapier and API access, guest and read-only users and team usage analytics are included in the single published plan.

Tettra's pricing is simple but has an entry threshold. The Scaling plan costs $8 per user per month with a 10-user minimum; yearly billing is described as 20% off, while the FAQ refers to two free months for annual payment, an inconsistency on the vendor's own page. SAML SSO and SCIM provisioning are paid add-ons on Scaling and included in the custom-priced Enterprise plan, and group permissions require the SCIM add-on. There is no free plan, only a 30-day trial that requires a card to continue. Teams outside Slack, for example those on Microsoft Teams, get less of its distinctive value.

KnowledgeOwl has built knowledge base software since 2011. It began as a start-up inside SurveyGizmo, now Alchemer, and was bought out in 2015 by Marybeth and Pete, who run it as a self-funded, privately held company with no outside investment. That ownership history makes it one of the few independent, bootstrapped vendors in the category.

Every plan includes unlimited private and public readers, internal and external knowledge bases, SAML and Salesforce SSO, remote authentication, custom author roles, an AI chatbot, AI search, AI article creation and summaries, a custom domain, full HTML, CSS and JavaScript branding, a developer API and HIPAA and GDPR compliance agreements. The vendor also includes a free theme build and white-glove migration, and offers a 25% discount to non-profits and B Corps.

The pricing model is distinctive: each plan includes one author and one knowledge base, with extra authors at $25 per month and extra knowledge bases at $50 per month. Plans differ mainly in article limits, AI credits, analytics retention and onboarding cadence, from Basic at $100 per month to Business at $500 per month. This suits documentation teams with few writers and many readers, but becomes expensive where dozens of employees need to author content.

Bloomfire is an enterprise knowledge management platform that now describes itself as transforming enterprise information into a trusted knowledge ecosystem. Its headline product is the Enterprise Intelligence Engine, presented as a governed reasoning layer for AI, supported by Persistent Semantic Memory, a continuously updated model of facts and relationships across connected systems, and Synapse, a conversational agent with built-in protections against unsupported answers.

The platform also retains its knowledge-management roots, with AI tools for identifying redundant, outdated or trivial content, and cites more than 100 connectors to enterprise systems plus a Universal Connector Framework for custom integrations. The homepage shows logos including Regeneron, Aetna, Raymond James and MGM Resorts, and Bloomfire's about page states that 15% of Fortune 100 companies use it.

Bloomfire's pricing is quote-based and described as a fixed price based on intended scope, with no consumption charges or user counts, and includes onboarding and content migration support. The fixed-scope model can be attractive for very large organisations, since cost does not rise with each additional employee, but the lack of a public price, trial or self-service option means it is not a realistic choice for small teams. Its shift in messaging from knowledge sharing to AI reasoning also means buyers should confirm which classic knowledge-base features remain in scope.