What is ChatPDF?
ChatPDF is listed under Deep Research & Documents, in the Research & Learning category on Flocci AI Tools. Chat with any PDF or document. It is freemium — a usable free tier with paid plans above it, and it lives at chatpdf.com.
What ChatPDF does
- Chat with any PDF or document
- Cited answers with page references
- Summaries and key points
- Free daily PDFs
ChatPDF — straight answers
Is ChatPDF free?
ChatPDF is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
What can ChatPDF do?
ChatPDF does 4 things the catalog singles out: Chat with any pdf or document; cited answers with page references; summaries and key points; free daily pdfs.
What is the best free alternative to ChatPDF?
STORM (Stanford) is the closest free alternative: it sits in the same Deep Research & Documents sub-category and is free. ChatGPT Deep Research, Gemini Deep Research and NotebookLM also start free. The full list is on the alternatives page.
See the full list →ChatPDF alternatives
Compare all alternatives →ChatGPT Deep Research
Deep Research & Documents
- Runs up to ~30 min for exhaustive reports
- Browses hundreds of sources
- Structured, cited long-form output
- Limited runs on lower tiers
Gemini Deep Research
Deep Research & Documents
- Multi-step research across the web
- Editable research plans
- Long, organized reports
- Available with Gemini
NotebookLM
Deep Research & Documents
- Grounded answers from your own sources
- Audio Overviews (podcast-style)
- Mind maps and study guides
- Free tier available
AlphaSense
Deep Research & Documents
- AI search across SEC filings, earnings transcripts, broker research, private data
- Enterprise workflow automation for financial/deal research
- Integrates FactSet, S&P Capital IQ, PitchBook
STORM (Stanford)
Deep Research & Documents
- MIT-licensed open-source system that researches a topic and writes a full cited report
- Perspective-guided simulated conversations to deepen research before writing
- Co-STORM variant adds human-AI collaborative curation
Perplexity
AI Search & Answer Engines
- Cited, real-time answers (1B+ queries/quarter)
- Focus modes and file uploads
- Comet browser and Spaces
- Strong free tier