AskYourPDF
A sensible pick when the job is repeatable question-answering across a document library rather than one clever answer, and the embeddable agent plus API are what separate it from the many ChatPDF clones. If you already live in Google's stack, NotebookLM covers the research half at no cost.
Pros
- Page-level source citations instead of unattributed summaries
- Documented API and Chrome extension, so it fits into existing workflows
- Very large per-document page ceilings (2,500 on Premium, 6,000 on Pro)
- Premium at $11.99/month billed yearly undercuts most document-chat rivals
Cons
- Free tier is one document, three conversations and 50 questions per day
- Advertised prices are annual-billing rates; monthly billing costs about 25% more
- Daily rather than monthly quotas mean a heavy research day hits a hard wall
- The 40-plus free writing tools are search-traffic surface, not the product