
ChatPDF
8.2#1 in ai pdf toolsFrom $89.99 a yearFree planAndroidiOSWebAPI
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ChatPDF suits students, researchers, and professionals who need to ask questions about or summarize document collections. Its citations, file-sharing controls, and API may also suit people building document-based workflows.
Doxy suits people who want to query files, web pages or YouTube transcripts and check responses against cited sources. It is available through the web and requires an account.