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ChatPDF vs Collate: catalog facts
ChatPDF	Collate
Freemium Free to use, with a paid Plus upgrade.	Free Free to download and use; cloud models can be used with your own key.
Web	macOS
Answers cite the passages they come from Folders for chatting across several files	Answers questions about a PDF or a folder of documents Links answers to source pages
Documents are processed on a remote service Chat history is only saved after signing up	Available for macOS only Local AI requires downloading a model
Downloadable app, Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.