How do their growth rates compare?

ChatPDF has a month-over-month growth rate of -3.7%; ResearchGPT has —.

How does pricing compare?

ChatPDF: Freemium. Freemium. A free tier lets you analyze a limited number of documents per day, and the core chat experience works without creating an account. ChatPDF Plus is a paid subscription that adds unlimited document analysis and advanced features — check the site for current plan details and regional pricing. ResearchGPT: Free. Free and open source under the MIT license. There is no subscription; you pay only for your own OpenAI API usage, plus any hosting and Redis costs if you self-host.

What are alternatives to ChatPDF and ResearchGPT?

Other tools in related categories include Claude, DeepSeek, Kimi AI, Semantic Scholar, Consensus.

ChatPDF vs ResearchGPT — Traffic (1.04M vs 0), Pricing & Verdict

Open AI Tools

ChatPDF vs ResearchGPT — Traffic (1.04M vs 0), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	ChatPDF	ResearchGPT
Official Domain	chatpdf.com	github.com
Pricing Model	Freemium	Free
Monthly Visits	1.04M (1,044,477)	0 (0)
MoM Traffic Delta	-40.47K (-3.7%)	0 (—)
Primary Market & Share	🇺🇸 United States (9.6%)	🌐 Global (—)
Direct Visits / mo	457.79K	0
User Rating	4.2	1.6
Supported Platforms	Website	Open Source

ChatPDF

Chat with any PDF, video, or website and get cited answers in seconds

Cited answers

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.

Multi-file chat and folders

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.

Summarization and translation

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.

Study and writing tools

Generate flashcards and slide decks from your material, and use the built-in AI writer and AI detector for drafting and checking academic text.

Strengths & Pros

+Answers include clickable citations tied to the original page, which makes fact-checking straightforward
+Works with PDFs, Word, PowerPoint, Markdown, text, YouTube links, and web pages in one place
+No account needed to try the core chat experience, and the free tier covers light daily use
+Multilingual: upload in one language and ask questions in another