How do their growth rates compare?

ChatPDF has a month-over-month growth rate of -3.7%; Semantic Search 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. Semantic Search: Free. Free. The extension is available at no cost from the Chrome Web Store, with no subscription tiers listed by the developer.

What are alternatives to ChatPDF and Semantic Search?

Other tools in related categories include Claude, Perplexity, Semantic Scholar, Metaso AI, Kagi Search.

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

Open AI Tools

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

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	ChatPDF	Semantic Search
Official Domain	chatpdf.com	chromewebstore.google.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	4
Supported Platforms	Website	Browser Extension

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