Diffbot vs Lettria (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Diffbot does not list a price
Free plan
Tie
Neither has one
Higher rating
Lettria
3.5 against 3.9
Same job?
Yes
Both are AI Infrastructure & Agent Tooling tools

Side by side

Compared on	Diffbot	Lettria
Our rating	3.5	3.9Better
Starts at	Not listed	Not listed
Free plan	No	No
Category	AI Infrastructure & Agent Tooling	AI Infrastructure & Agent Tooling
Plans	See pricing	See pricing
Key features	Computer vision renders and classifies webpages into structured data NLP-based entity extraction and relationship mapping Knowledge Graph spanning billions of public web entities Sub-300ms Extract and Web Search performance Crawl builds queryable datasets from entire websites	Ontology-powered knowledge graphs built from a company's own documents Stated 30%+ accuracy improvement over vector-based RAG on complex knowledge Perseus generates production-ready ontologies from domain data in minutes Built for compliance and traceability in regulated industries Business experts kept in the loop during graph generation
Pros	Genuinely fast (sub-300ms) structured extraction at real scale Self-hostable option available for teams with strict data-control requirements Knowledge Graph adds verified structured context beyond raw scraped text	Traceability and auditability matter for AI used in regulated industries Perseus meaningfully speeds up what is normally a months-long ontology project A named, checkable enterprise case study rather than only a claim
Cons	No published pricing - a sales-driven process Best suited to teams with developer resources to integrate the API Web scraping/extraction tools carry inherent terms-of-service considerations per target site	No public pricing; every engagement starts with a demo or trial request Requires a real implementation project, not a plug-and-play setup Overkill for a small team with a basic internal search need
Company	Diffbot	Lettria, founded 2019

Prices come from each vendor's pricing page, last checked 20260923. Check the vendor before you buy.

FAQ

Questions people ask

Is Diffbot better than Lettria?

In our reviews Diffbot scores 3.5 and Lettria scores 3.9. The better pick depends on the job. Diffbot: Computer vision renders and classifies any webpage into clean structured data in under 300ms, then feeds it into a Knowledge Graph spanning billions of people, organizations, and products. Lettria: Graph Context Layer platform from Lettria that turns enterprise documents and unstructured knowledge into ontology-powered graphs for grounded, traceable AI.

Which is cheaper, Diffbot or Lettria?

Diffbot: see pricing. Lettria: see pricing.

Do Diffbot and Lettria have free plans?

Neither lists a free plan.

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