How do their growth rates compare?

TopPDF has a month-over-month growth rate of -90.6%; ZeroGPT has +19.7%.

How does pricing compare?

TopPDF: Freemium. Freemium. Core PDF tools such as editing, conversion and compression can be used for free with limits, while a paid subscription unlocks larger files, advanced editing and higher usage volumes. Exact plan prices are shown inside the product rather than on a public pricing page, so check the app for current tiers. ZeroGPT: Freemium, Paid. Freemium with paid tiers. Core tools such as the AI detector, summarizer, and grammar checker are usable free in the browser, while MAX and EXPERT subscriptions unlock higher limits and premium features, and API access is sold separately for organizations.

What are alternatives to TopPDF and ZeroGPT?

Other tools in related categories include Grammarly, QuillBot Paraphraser, GPTZero, Scribbr, Image to Text.

TopPDF vs ZeroGPT — Traffic (643 vs 32.86M), Pricing & Verdict

Open AI Tools

TopPDF vs ZeroGPT — Traffic (643 vs 32.86M), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	TopPDF	ZeroGPT
Official Domain	toppdf.co	zerogpt.com
Pricing Model	Freemium	Freemium, Paid
Monthly Visits	643 (643)	32.86M (32,864,541)
MoM Traffic Delta	-6.17K (-90.6%)	+5.41M (+19.7%)
Primary Market & Share	🌐 Global (—)	🇺🇸 United States (43%)
Direct Visits / mo	230	8.22M
User Rating	3.9	3.8
Supported Platforms	Website	Website

TopPDF

All-in-one AI PDF tools to edit, convert, compress and translate documents

PDF editing and translation

Modify text and images directly inside a PDF and translate document content into many languages while keeping the original page layout intact.

Compress, merge and split

Shrink, merge and split PDFs so large documents are easier to store, share and organise, with compression that aims to preserve visible quality.

Two-way format conversion

Convert PDFs to Word, Excel, PowerPoint and JPG, and convert Word, Excel, PowerPoint, JPG and EPUB back into PDF.

AI grammar checker and paraphraser

An AI grammar checker that finds grammatical errors and spelling mistakes across multiple languages, plus a paraphrasing tool for fast rewriting.

Strengths & Pros

+Wide all-in-one toolkit covering editing, conversion, compression and translation
+Two-way conversion between PDF and Word, Excel, PowerPoint and JPG
+Multi-language interface and a PDF translator covering many languages
+OCR makes scanned and image-based documents editable
+Grammar checker and paraphraser add useful AI writing help in the same place