Best Internal Knowledge Base Software in 2026
Updated
In short: Confluence is ranked #1 of 25 as of 3 October 2026, ahead of Notion and ProProfs Knowledge Base. The best-ranked option with a free plan is Notion. The lowest first paid tier on this page is Slite at $0.83/mo.
A shared internal knowledge base can help teams organize reference material and find it again. Compared on AI search or answers and semantic search, the entries also differ in deployment, version history, single sign-on, and Slack integration. Free-plan availability and paid-from pricing add cost factors to consider. Confluence leads the ranking, with Notion and Nuclino also among its first entries, followed by ProProfs Knowledge Base. Consider how your team creates, updates, and retrieves information, then weigh the listed search and management features against those needs.
25 internal knowledge base software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Confluence iPhone + Android RecognisedPhone appDocumentedFree plan 7.9$5.42/mo Single sign-on: Yes
- 2 Notion iPhone + Android RecognisedPhone appDocumentedFree plan 7.9$10/mo AI search or answers: YesSemantic search: YesSingle sign-on: Yes
- 3 ProProfs Knowledge Base iPhone + Android RecognisedPhone appDocumentedFree plan 7.9$0.99/mo Single sign-on: Yes
- 4 Papyrs iPhone + Android RecognisedPhone appDocumentedFree plan 7.8Free AI search or answers: NoSemantic search: NoSingle sign-on: Yes
- 5 Nuclino iPhone + Android RecognisedPhone appDocumentedFree plan 7.7Free Single sign-on: Yes
- 6 Whale iPhone + Android RecognisedPhone appDocumentedFree plan 7.6$249/mo
- 7 Zoho Learn iPhone + Android RecognisedPhone appDocumentedFree plan 7.6Free
- 8 Slite iPhone + Android RecognisedPhone appDocumentedFree plan 7.0$0.83/mo Single sign-on: Yes
- 9 Elium iPhone + Android RecognisedPhone appDocumentedFree plan 6.9€15/mo AI search or answers: YesSemantic search: YesSingle sign-on: Yes
- 10 Waybook iPhone + Android RecognisedPhone appDocumentedFree plan 6.9$99/mo
- 11 Outline iPhone + Android RecognisedPhone appDocumentedFree plan 6.8$10/mo Single sign-on: Yes
- 12 Trainual iPhone + Android RecognisedPhone appDocumentedFree plan 6.6 AI search or answers: YesSemantic search: YesSingle sign-on: Yes
- 13 BlueSpice No phone app RecognisedPhone appDocumentedFree plan 6.3€4.50/mo Single sign-on: Yes
- 14 Slab No phone app RecognisedPhone appDocumentedFree plan 6.1$6.67/mo Single sign-on: Yes
- 15 Flocci Library No phone app RecognisedPhone appDocumentedFree plan 6.0₹49/mo AI search or answers: NoSemantic search: NoSingle sign-on: Yes
- 16 Stack Internal No phone app RecognisedPhone appDocumentedFree plan 5.9Free AI search or answers: YesSingle sign-on: Yes
- 17 Kipwise No phone app RecognisedPhone appDocumentedFree plan 5.4$6.30/mo AI search or answers: YesSingle sign-on: Yes
- 18 Guru No phone app RecognisedPhone appDocumentedFree plan 5.3 Single sign-on: Yes
- 19 Helpjuice No phone app RecognisedPhone appDocumentedFree plan 5.3 Single sign-on: Yes
- 20 KnowledgeOwl No phone app RecognisedPhone appDocumentedFree plan 5.3$100/mo Single sign-on: Yes
- 21 Tettra No phone app RecognisedPhone appDocumentedFree plan 5.3$8/mo Single sign-on: Yes
- 22 XWiki No phone app RecognisedPhone appDocumentedFree plan 5.3 AI search or answers: YesSemantic search: NoSingle sign-on: Yes
- 23 Bloomfire No phone app RecognisedPhone appDocumentedFree plan 5.2 Single sign-on: Yes
- 24 Document360 No phone app RecognisedPhone appDocumentedFree plan 5.2 Single sign-on: Yes
- 25 Red Arch Knowledge Manager No phone app RecognisedPhone appDocumentedFree plan 5.2 AI search or answers: YesSemantic search: YesSingle sign-on: Yes
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which internal knowledge base software is ranked first on Samsung Mobile US Press?
Confluence is ranked #1 of 25 with a score of 7.9. Notion is second and ProProfs Knowledge Base third.
How many of these have a free plan?
11 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Slite has the lowest first paid tier we found: $0.83/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.