kitio.aiDocumentation.AI vs Fluid Topics
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Documentation.AI starts at See pricing page and Fluid Topics starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI documentation agent
- Cited AI assistant for readers
- Docs as code with Git
- OpenAPI playground
- Reader and authoring MCP servers
- Versions and localisation
- AI search
- Generative answers
- Documentation portal designer
- In-product help
- Helpdesk integration
- Content analytics
| Feature | Documentation.AI | Fluid Topics |
|---|---|---|
| Best for | Docs platform whose AI agent drafts updates from code and tickets | Product knowledge platform with AI search and generative answers |
| Category | Productivity | Productivity |
| Pricing model | Freemium | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | No |
| Made by | Documentation.AI | Fluid Topics |
| Based in | – | France |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Documentation.AI starts at See pricing page and Fluid Topics starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Starter
Free
- 5 editor seats
- Visual web editor
- AI Assistant
- Embeddable docs
Standard
$55/mo billed yearly
- 10 editor seats
- Password-protected docs
- External sources for AI
Pro
$159/mo billed yearly
- Unlimited editor seats
- Private docs with JWT or OAuth
- Advanced analytics
- PDF export
Enterprise
Contact sales
- AI agent and automations
- Docs and authoring MCP servers
- Custom SLAs
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Documentation.AI
- Docs update from code changes
- Free plan includes AI assistant
- Works for both writers and developers
- Paid prices shown only with yearly billing
- Private docs with login need Pro
- AI usage runs on credits
Fluid Topics
- One source for all product content
- Answers grounded in your documentation
- Analytics on content use
- No public pricing
- Best for large documentation sets
- Setup needs content structuring
Which one should you choose?
Choose Documentation.AI if you want:
- Docs update from code changes
- Free plan includes AI assistant
- Works for both writers and developers
Watch out: paid prices shown only with yearly billing.
Choose Fluid Topics if you want:
- One source for all product content
- Answers grounded in your documentation
- Analytics on content use
Watch out: no public pricing.
Documentation.AI vs Fluid Topics FAQ
What is the difference between Documentation.AI and Fluid Topics?
Documentation.AI: Docs platform whose AI agent drafts updates from code and tickets. Fluid Topics: Product knowledge platform with AI search and generative answers. Both are productivity tools.
Is Documentation.AI or Fluid Topics cheaper?
Documentation.AI starts at See pricing page and Fluid Topics starts at See pricing page. Check both pricing pages for current plans.
Do Documentation.AI and Fluid Topics have free plans?
Documentation.AI: Yes. Fluid Topics: No.
Who makes Documentation.AI?
Documentation.AI is made by Documentation.AI.
Who makes Fluid Topics?
Fluid Topics is made by Fluid Topics, based in France.
Which should I choose, Documentation.AI or Fluid Topics?
Choose Documentation.AI if you value docs update from code changes and free plan includes ai assistant. Choose Fluid Topics if you value one source for all product content and answers grounded in your documentation.