Independent · sourced · Updated June 2026
Best Knowledge Base Software (2026)
The cheapest knowledge base software is Notion at $0/mo. 3 offer a free tier (Notion, Nuclino, Slab). This page compares 8 options on entry price, free tier, HIPAA/SOC 2 and best-for — every figure linked to its source, updated June 2026.
8 options compared on price, free tier, compliance and fit — ranked cheapest-first. Every figure links to the vendor's own page and the date we captured it; quote-only tiers show “—”, never a guess.
Key takeaways
- Cheapest: Notion at $0/mo (Free).
- Typical paid price: from $6/mo, median $10/mo, up to $249/mo — across 5 with published pricing.
- Free tier: Notion, Nuclino, Slab.
- HIPAA-ready: Notion, Slite, Guru.
- Tracked: 8 vendors, data current through 2026-06-15.
Comparison
| # | Knowledge Base Software | Entry price | Free | HIPAA | SOC 2 | Best for | Source |
|---|---|---|---|---|---|---|---|
| 1 | Notion | $0/mo Free | Yes | Yes | Yes | All-in-one teams replacing separate wiki, project tracker, and notes apps | notion.com |
| 2 | Nuclino | $0/mo Free | Yes | No | Yes | Small to mid-size teams prioritizing speed and simplicity over feature depth | nuclino.com |
| 3 | Slab | $0/mo Free | Yes | No | Yes | Engineering and product teams wanting GitHub-native documentation | slab.com |
| 4 | Tettra | $8/mo Scaling | No | No | — | Slack-centric teams wanting AI-answered Q&A without leaving Slack | tettra.com |
| 5 | Slite | $10/mo Basic | No | Yes | Yes | Teams wanting an AI-first self-maintaining knowledge base | slite.com |
| 6 | Helpjuice | $249/mo Knowledge Base | No | No | Yes | Customer support teams needing a standalone knowledge base | helpjuice.com |
| 7 | Document360 | — | No | — | — | Customer-facing product documentation at scale | quote-only |
| 8 | Guru | — | No | Yes | Yes | Enterprise teams needing AI-powered knowledge with strong security (SOC 2 Type II) | quote-only |
Prices are the lowest published self-serve monthly rate as captured on the linked source. Annual-billing and usage details are on each vendor's record in our open dataset.
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Frequently asked questions
What is the cheapest knowledge base software?
Notion has the lowest published entry price at $0/mo (Free), as of 2026-06-15.
How much does knowledge base software cost per month?
Across the 5 knowledge base software with published paid pricing, the median starting price is $10/mo, ranging from $6/mo to $249/mo, as of 2026-06-15. 3 also offer a free tier. 2 are quote-only.
Which knowledge base software have a free plan?
Notion, Nuclino, Slab offer a free tier.
Which knowledge base software support HIPAA?
Notion, Slite, Guru state HIPAA support (a BAA). Always confirm current scope with the vendor.
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How we compiled this
Pricing fetched directly from each vendor's official pricing page via WebFetch on 2026-06-14. Document360 and Guru publish no self-serve USD prices — all plans require a sales quote; recorded as null/custom. Helpjuice prices confirmed on official pricing page (3 flat-rate plans). Slab prices from official pricing page — annual rates ($6.67 and $12.50/user/month) confirmed; the official page publishes only annual per-user rates, so per-user monthlyUsd for Startup and Business is null (the previously-recorded $12 and $25/user/month monthly figures could not be confirmed by any credible source). Notion USD prices sourced from softwareadvice.com (official page renders EUR for this environment); Plus $12/$10 and Business $24/$18 per user per month confirmed. Nuclino prices from softwareadvice.com (official page renders without price values for this environment); Starter $6, Business $10 per user per month confirmed via getapp.com. Slite prices (Basic $10, Pro $20/user/month billed annually) confirmed on official page; monthly-only rate not published. Tettra prices ($8/user/month, 10-user minimum) confirmed on official page with 20% annual discount. Slashdot.org and softwareadvice.com used as corroboration sources where available. All accessedAt dates set to 2026-06-14.
Last verified 2026-06-15. We re-check published prices and compliance on a recurring cadence and update this page when they change.
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