Diffbot
Transform the raw web into structured knowledge
Diffbot is a set of APIs for turning web content into structured, queryable data. It extracts structured JSON from individual pages, crawls entire sites from a seed URL, analyzes natural language to resolve entities, relationships, facts and sentiment, and queries a Knowledge Graph of the public web covering companies, people and news. It also provides web search, including a self-hostable search index that can run offline on a single machine or Kubernetes cluster without ads or telemetry.
The product suite includes Extract, Crawl, Natural Language, Knowledge Graph and Web Search APIs, plus LeadGraph. Web Search combines a first-party index with retrieval, reranking and chunking, returning full document content without a separate web fetch step, and can be accessed through an API, MCP or agent skills. Diffbot operates its own crawl of the public web on custom hardware in California, independent of Google and Bing.
Diffbot is aimed at developers and teams building data pipelines, AI agents and research workflows that need grounded web knowledge. Plans are credit-based and monthly: a Free plan with no credit card required, Startup and Plus tiers with increasing credit allotments, rate limits and user seats, and a custom Enterprise tier. Crawling is available on Plus and above, and a free student and academic program provides Startup-tier access.
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