Best Knowledge Base Software · FREE
Best free Knowledge Base Software (2026)
3 knowledge base software that offer a genuine free plan, ranked by entry price. Every figure links to the vendor's own page and the date we captured it.
Key takeaways
- Cheapest: Notion at $0/mo.
- Qualifying: Notion, Nuclino, Slab.
- Data current through: 2026-06-14.
Comparison
| # | Knowledge Base Software | Entry price | Free | HIPAA | SOC 2 | Best for | Source |
|---|---|---|---|---|---|---|---|
| 1 | Notion | $0/mo | Yes | Yes | Yes | All-in-one teams replacing separate wiki, project tracker, and notes apps | notion.com |
| 2 | Nuclino | $0/mo | Yes | No | Yes | Small to mid-size teams prioritizing speed and simplicity over feature depth | nuclino.com |
| 3 | Slab | $0/mo | Yes | No | Yes | Engineering and product teams wanting GitHub-native documentation | slab.com |