ChatPDF records 1,044,477 monthly visits with -3.7% month-over-month growth and Freemium pricing. Instafill.ai records 35,630 monthly visits with -36.6% growth and Free Trial, Paid, Contact for Pricing pricing.
Chat with any PDF, video, or website and get cited answers in seconds
AI that fills your PDF and Word forms for you
| Dimension / Metric | | |
|---|---|---|
| Official Domain | chatpdf.com | instafill.ai |
| Pricing Model | Freemium | Free Trial, Paid, Contact for Pricing |
| Monthly Visits | 1.04M (1,044,477) | 35.63K (35,630) |
| MoM Traffic Delta | -40.47K (-3.7%) | -20.6K (-36.6%) |
| Primary Market & Share | 🇺🇸 United States (9.6%) | 🇺🇸 United States (68.3%) |
| Direct Visits / mo | 457.79K | 7.63K |
| User Rating | 4.2 | 4.3 |
| Supported Platforms | Website | Website |
Chat with any PDF, video, or website and get cited answers in seconds
Every response is anchored to your source document with clickable citations that scroll to the exact passage, so verification takes seconds instead of page-by-page searching.
Organize documents into folders and query many files in a single conversation to compare arguments, cross-reference findings, or study a whole syllabus at once.
Condense long papers, reports, and contracts into key takeaways, and translate or query documents in any language — including mixing a source language with a different question language.
Generate flashcards and slide decks from your material, and use the built-in AI writer and AI detector for drafting and checking academic text.
AI that fills your PDF and Word forms for you
Automatically detects and maps every field in a flat PDF or Word form, using semantic understanding rather than rigid templates.
Each filled field can display its source and the reasoning behind the value, making verification fast and auditable.
Runs concurrent parallel field filling and handles structured row data, so multi-form packets and repeating tables are completed together.
An MCP server lets you fill PDFs from inside Claude Desktop, Code, or ChatGPT, plus n8n and Zapier automations for wider workflows.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Build powerful forms, surveys and quizzes with AI in minutes
A free, AI-powered PDF editor for every device
Free AI-powered PDF editor, converter and reader for every device
Free AI-powered PDF editor, converter and reader for every device
Combines full desktop PDF editing software with AI chat, but requires software installation for full features.
Chat with any PDF and get cited answers instantly
Chat with any PDF and add an AI chatbot trained on your own content
Chat with any PDF and add an AI chatbot trained on your own content
SpecialistPrivate AI that answers from your own documents, on Mac and Windows
SpecialistPrivate AI that answers from your own documents, on Mac and Windows
Turn any PDF into editable, translatable, searchable knowledge
Great for comparing multiple documents and spreadsheets side by side, but smaller overall user community.
Great for comparing multiple documents and spreadsheets side by side, but smaller overall user community.
Clean interface for complex technical document summarization, but offers fewer advanced export formatting options.
AI-powered data extraction from invoices, IDs, receipts and any business document
AI-powered data extraction from invoices, IDs, receipts and any business document
