PDF Compare API: diff two documents

Compare two PDFs via REST API: similarity score, paragraph-level diff and highlighted changes, for contract review and document versions. Start free, no card.

REST API for comparing two PDF documents. Returns a similarity score, diff highlights, and paragraph-level changes. Ideal for legal/contract workflows and document versioning.

Price: free

The platform is in beta: payments are not live yet, so paid plans cannot be purchased — they open in 2027. Everything you see can be used right now for free, on the free-plan quotas, with no credit card.