Glossary
What is Knowledge graph?
Verified 21 September 2026
Entities are nodes, relationships are typed edges, and both can carry attributes. The value is in the traversal: multi-hop questions that no amount of text retrieval answers become single queries.
It is worth distinguishing a knowledge graph of *things* — a company with a headcount and a founder — from a graph of *documents and their coverage*. Diffbot builds the former; a coverage graph is the latter. Different structures for different questions.
Common questions
What is Knowledge graph?
A knowledge graph stores entities and the relationships between them as a queryable structure of typed nodes and edges.
How does Knowledge graph work in practice?
It is worth distinguishing a knowledge graph of *things* — a company with a headcount and a founder — from a graph of *documents and their coverage*. Diffbot builds the former; a coverage graph is the latter. Different structures for different questions.
See it working
The free tier is 10,000 credits a month with no card — enough to test any of this against your own queries.