10 Best Knowledge Base Software of 2026

Confluence is the default internal knowledge base for many companies, and its pricing explains why. The Free plan covers ten users with pages, spaces, databases, templates and 2 GB of storage. Standard costs $5.78 per user per month and adds Rovo Search, Chat and Agents, free guest access, advanced permissions, 250 GB of storage and room for up to 250,000 users per site. Premium, at $11.16, adds a dynamic intranet, unlimited whiteboards, admin insights, unlimited storage and a 99.9% uptime SLA. The structure of spaces, page trees and permissions suits process documentation that many departments maintain at once. The trade-offs are real: the editor has more options than a lightweight wiki, so new writers take longer to settle in, and SSO and SCIM require Atlassian Guard unless you buy Enterprise. Customer-facing help centers are not its focus either. For internal documentation at a low per-user price, it is the strongest choice we compared.

Help Scout treats the knowledge base as part of support, not a separate project. The free plan gives five users one inbox and one Docs site, which is enough for a small company to publish a searchable help center and answer the email that still comes in. Standard, at $25 per user per month on annual billing, adds multiple knowledge bases, live chat, SMS, WhatsApp, Instagram and Messenger, basic workflows and an AI Inbox assistant. Plus, at $45, brings a secure customer portal, unlimited AI Drafts, round robin routing and Salesforce, Jira and HubSpot integrations. Its AI assistant answers customers from your content and costs $0.75 per resolution. The limits are clear: Docs is a customer-facing help center, so internal runbooks and policy pages fit better in a wiki, and you pay per agent seat even if only two people write articles. For support teams that want deflection and ticketing in one bill, it is the easiest option here.

Notion works as a knowledge base when a team wants documentation to sit next to the projects it describes. Pages and databases can hold anything from an onboarding guide to a vendor list, and any page can be published to the web, with custom sites, themes and Google Analytics on Plus. The features that matter most for a company wiki arrive on Business: a verified badge marks pages as up to date and shows in search results and AI citations, Enterprise Search looks across connected apps such as Slack and GitHub, private teamspaces hide sensitive pages, and SAML SSO handles access. A custom domain for a public site costs $8 per month per domain on annual billing. The flexibility is also the risk. Without someone owning the structure, a Notion wiki drifts, and help-center basics such as article feedback and ticket deflection are not its focus. The pricing page showed euros from our location, so the USD price is pending.

Slab is a wiki that stays out of the way. Every plan, including the free one for up to ten users, has unlimited posts and topics, realtime collaboration, templates, verification and unified search across connected tools. Startup costs $6.67 per user per month on annual billing and removes the user cap, adds private topics, 365 days of version history, unlimited standard integrations and AI Autofix. Business, at $12.50, adds custom domains, AI Predict and AI Ask, SAML-based SSO, SCIM provisioning, premium integrations, a GraphQL API and webhooks. The narrow scope is the point: it does not try to be a project tool or a database, which keeps pages easy to find and write. That same scope means there is no customer-facing help center, and the AI answer feature sits on the higher tier. For an internal knowledge base that small teams will keep current, it is among the best values we compared.

Document360 is a knowledge base product first, and its feature list shows it. Each project is a complete knowledge base, public or private, with its own users, domain, branding and readers, and you can run several side by side. Writers get a feedback manager, a custom workflow builder that routes articles through approval stages, import from PDF and Word, and the Eddy AI writing agent, which also handles FAQ creation, glossaries and duplicate content detection. Readers get AI search and answers, and the platform exposes an MCP server for AI tools. SEO controls cover meta titles, redirect rules, robots.txt and automatic sitemaps, and every plan is SOC 2 Type II compliant. The catch is price transparency: Document360 now quotes every plan based on team accounts, workspaces, languages, security needs and AI usage, so you cannot compare costs without a sales call. The 14-day free trial includes every feature. For documentation teams that need governance, it is the most complete option we compared.

Tettra solves a specific problem: the same internal questions asked again and again in Slack. Its Scaling plan, at $8 per user per month on yearly billing or $10 monthly with a ten user minimum, includes an AI bot that answers in Slack DMs and channels, summarizes threads and can mine existing Slack answers into pages. It also has question and answer flows with page requests, AI page tagging and FAQ generation, Google Workspace integration, usage analytics and API access. For upkeep it offers verification plus reports on stale, unowned and public content, which help an operations lead keep the knowledge base honest. The limits: there is no free plan, the seat minimum means the real starting cost is $80 a month, SAML SSO and SCIM are paid add-ons below Enterprise, and teams that do not use Slack lose much of the appeal. For Slack-centric companies, it turns repeat questions into documented answers with little effort.

Zendesk's help center is strongest when it is part of a full support operation. The Suite plans bundle ticketing, messaging, live chat, voice and a help center, and Suite Team, at $55 per agent per month paid yearly, adds AI Agents, an AI Knowledge Base, the AI Action Builder and omnichannel routing. The pricing page lists a knowledge builder that generates a ready-to-use knowledge base from ticket history, generative search that answers at the top of help center results, article view permissions, contextual self-service in the web widget and mobile SDK, and localization in more than 40 languages on higher tiers, where you can also add community forums and run several help centers. The costs are the issue for smaller teams: you pay per agent, monthly billing raises Suite Team to $69, and the admin side takes time to learn. If your team already runs Zendesk tickets, its help center is the obvious choice. If you only need articles, a standalone tool is cheaper.

KnowledgeOwl prices by the people who write, not the people who read. Basic costs $100 per month with one author and one knowledge base, and you add authors at $25 and knowledge bases at $50 per month; yearly billing saves 10 percent. Every plan includes unlimited private and public readers and internal and external knowledge bases. The plan comparison also lists private articles with sign-in, SAML and Salesforce SSO, an AI chatbot, AI search, AI article creation and search analytics that show content gaps, though not every item is on Basic, so check the tier you need. Writers get a rich text editor, version history, global find and replace and Word import, and the vendor's team helps with onboarding, theming and migration. The model is a good deal for a small support or operations team serving a large audience, but a team where ten people write will pay more than a per-user wiki. B Corporations and nonprofits get 25 percent off.

GitBook is the pick on this list for technical help content. Its block-based editor syncs with GitHub and GitLab, generates interactive API documentation and creates an MCP server for each published site so AI coding assistants can read the docs. The free plan suits a single person. Essential costs $65 per site per month plus $12 per team member on annual billing, and adds team collaboration, a custom domain, analytics and user feedback, site redirects, reusable content, an AI Assistant and $20 of AI credits. Ultimate, at $249 per site, adds an AI chat sidebar for readers, AI insights that show knowledge gaps and $100 of credits. The pricing model works for one public docs site with a small team, but several sites or a large group of editors raise the bill quickly. Non-technical support staff may also find the Git workflow more than they need. For developer-facing products, it is a strong home for help docs.

Helpjuice sells a knowledge base that its own team styles for you. Plans are priced per month by users and storage: the entry plan includes 30 users and 12GB of storage, the AI plan 100 users and 24GB, and the top plan unlimited users and 38GB. Every plan includes the custom design work, live collaboration and workflows, and localization in as many languages as you need, with AI article translation into more than 40 languages. The AI suite, made up of AI Writer, AI Search and AI Chatbot, plus a Chrome extension that keeps the knowledge base updated and a step-by-step tutorial builder, is not included on the entry plan, and SSO also starts on the second tier. That makes it the costliest way on this list to get AI search over your articles. The page did not show a currency symbol from our location, so we list pricing as pending. For teams that want a polished, branded help site built for them, it is worth a demo.