kitio.aiDiffbot vs Lettria
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Diffbot starts at $299/mo and Lettria 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
- Automatic extraction APIs
- Knowledge Graph
- Web crawler
- Natural language API
- Grounded LLM
- Document parsing
- Ontology generation
- Text-to-graph conversion
- GraphRAG retrieval
- Perseus developer tool
| Feature | Diffbot | Lettria |
|---|---|---|
| Best for | Web extraction APIs and a knowledge graph of the web | GraphRAG and ontology tools for regulated industries |
| Category | Data & analytics | Data & analytics |
| Pricing model | Freemium | Paid |
| Starting price | $299/mo | See pricing page |
| Free plan | Yes | No |
| Made by | Diffbot | Lettria |
| Based in | United States | France |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Diffbot starts at $299/mo and Lettria starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- 9,500 credits per month
- All four APIs included
- 5 requests per minute
Startup
$299/mo
- 250,000 credits per month
- Overage at $0.001 per credit
- 5 requests per second
Plus
$899/mo
- 1,000,000 credits per month
- Crawl access (25 active)
- 3 user seats
- 25 requests per second
Enterprise
Custom
- Custom credit allotment
- 100+ active crawls
- Custom rate limits and support
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Diffbot
- No per-site rules needed
- Very large knowledge graph
- Long track record
- Paid plans are expensive
- Less control over custom fields
Lettria
- Answers are traceable to source documents
- Targets regulated sectors
- Business experts can review ontologies
- Pricing is sales-led
- Needs ontology and graph know-how
- Heavy for simple document search
Which one should you choose?
Choose Diffbot if you want:
- No per-site rules needed
- Very large knowledge graph
- Long track record
Watch out: paid plans are expensive.
Choose Lettria if you want:
- Answers are traceable to source documents
- Targets regulated sectors
- Business experts can review ontologies
Watch out: pricing is sales-led.
Diffbot vs Lettria FAQ
What is the difference between Diffbot and Lettria?
Diffbot: Web extraction APIs and a knowledge graph of the web. Lettria: GraphRAG and ontology tools for regulated industries. Both are data & analytics tools.
Is Diffbot or Lettria cheaper?
Diffbot starts at $299/mo and Lettria starts at See pricing page. Check both pricing pages for current plans.
Do Diffbot and Lettria have free plans?
Diffbot: Yes. Lettria: No.
Who makes Diffbot?
Diffbot is made by Diffbot, based in United States.
Who makes Lettria?
Lettria is made by Lettria, based in France.
Which should I choose, Diffbot or Lettria?
Choose Diffbot if you value no per-site rules needed and very large knowledge graph. Choose Lettria if you value answers are traceable to source documents and targets regulated sectors.