kitio.aiInfraNodus vs Serpex
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. InfraNodus starts at See pricing page and Serpex starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Text network visualisation
- AI insight generation
- Gap detection
- GraphRAG and MCP server
- Obsidian and VS Code plugins
- API access
- Real-time search API
- URL to markdown extraction
- Automatic source fallback
- Python and JS SDKs
- MCP and LangChain support
| Feature | InfraNodus | Serpex |
|---|---|---|
| Best for | Knowledge-graph text analysis that surfaces gaps and ideas | Pay-as-you-go web search and extraction API for AI agents |
| Category | Research & search | Research & search |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | Nodus Labs | Serpex |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
InfraNodus starts at See pricing page and Serpex starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Starter
$0.80 / 1K searches
- $5 to $49 top-ups
- 5 requests per second
Standard
$0.65 / 1K searches
- $50 to $499 top-ups
- 25 requests per second
Scale
$0.50 / 1K searches
- $500 to $1,999 top-ups
- 50 requests per second
Enterprise
Contact sales
- Custom pricing and SLAs
- From $0.20 per 1K at high volume
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
InfraNodus
- Visual graphs make topic gaps easy to see
- Works with Obsidian, VS Code and Cursor
- MCP server for AI assistants
- Handles surveys, reviews and research text
- Graph-based approach takes time to learn
- Plan pricing not shown on the homepage
- Broad feature list can overwhelm newcomers
Serpex
- Low cost per search
- Credits never expire
- Search and extraction under one key
- Rate limits depend on top-up size
- Developer-only product
- Newer than established search APIs
Which one should you choose?
Choose InfraNodus if you want:
- Visual graphs make topic gaps easy to see
- Works with Obsidian, VS Code and Cursor
- MCP server for AI assistants
Watch out: graph-based approach takes time to learn.
Choose Serpex if you want:
- Low cost per search
- Credits never expire
- Search and extraction under one key
Watch out: rate limits depend on top-up size.
InfraNodus vs Serpex FAQ
What is the difference between InfraNodus and Serpex?
InfraNodus: Knowledge-graph text analysis that surfaces gaps and ideas. Serpex: Pay-as-you-go web search and extraction API for AI agents. Both are research & search tools.
Is InfraNodus or Serpex cheaper?
InfraNodus starts at See pricing page and Serpex starts at See pricing page. Check both pricing pages for current plans.
Do InfraNodus and Serpex have free plans?
InfraNodus: Yes. Serpex: Yes.
Who makes InfraNodus?
InfraNodus is made by Nodus Labs.
Who makes Serpex?
Serpex is made by Serpex.
Which should I choose, InfraNodus or Serpex?
Choose InfraNodus if you value visual graphs make topic gaps easy to see and works with obsidian, vs code and cursor. Choose Serpex if you value low cost per search and credits never expire.