Sorted by starting price

6 Cheapest Free Knowledge Base Software of 2026

By the Rankozo research desk · Updated November 9, 2026

Among the 9 tools in our best free knowledge base software ranking, Confluence has the lowest verified paid starting price at $5.78 per user per month. Prices below are quoted from each vendor's US pricing page.

1. 01

   Confluence

   Teams of up to 10 that want the most structured free wiki, especially if they already use Jira.

   Free for up to 10 users; Standard $5.78 per user per month on monthly billing

   Full entry, No. 2 overall

   Starts at

   $5.78

   Score 8.6

2. 02

   Nuclino

   Very small teams starting a wiki who expect to upgrade once they pass 50 documents.

   Free for up to 50 items; Starter $6 per user per month billed yearly

   Full entry, No. 8 overall

   Starts at

   $6

   Score 8.0

3. 03

   Slab

   Small teams who want a hosted internal wiki with no page cap and room for 10 people at $0.

   Free for up to 10 users; Startup $6.67 per user per month billed annually

   Full entry, No. 1 overall

   Starts at

   $6.67

   Score 8.7

4. 04

   Outline

   Teams that want a free self-hosted wiki, or a cloud wiki with one flat price for up to 10 members.

   Community Edition $0 to self-host; Cloud $10 per month for 1 to 10 members

   Full entry, No. 4 overall

   Starts at

   $10

   Score 8.5

5. 05

   Help Scout Docs

   Small support teams that want a free, branded customer help center connected to their inbox.

   Free plan with 5 users, 1 Inbox and 1 Docs site; Standard $25 per user per month billed annually

   Full entry, No. 7 overall

   Starts at

   $25

   Score 8.2

6. 06

   GitBook

   Solo developers publishing product or API docs, and teams with a budget for a public docs site.

   Free for individuals; Essential $65 per site per month billed annually plus $12 per extra user

   Full entry, No. 9 overall

   Starts at

   $65

   Score 7.7

Scores and prices come from our Best Free Knowledge Base Software ranking, which uses one method for every tool. Questions or corrections: editorial@rankozo.com