ChatPDF records 1,044,477 monthly visits with -3.7% month-over-month growth and Freemium pricing. Zeli records 56,147 monthly visits with -46.8% growth and Free pricing.
Chat with any PDF, video, or website and get cited answers in seconds
Hacker News and AI paper summaries in seven languages
| Dimension / Metric | | |
|---|---|---|
| Official Domain | chatpdf.com | zeli.app |
| Pricing Model | Freemium | Free |
| Monthly Visits | 1.04M (1,044,477) | 56.15K (56,147) |
| MoM Traffic Delta | -40.47K (-3.7%) | -49.3K (-46.8%) |
| Primary Market & Share | 🇺🇸 United States (9.6%) | 🇨🇳 China (65.1%) |
| Direct Visits / mo | 457.79K | 39.95K |
| 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.
Hacker News and AI paper summaries in seven languages
Each story carries a short summary generated from the linked article plus a standout key quote, so you can judge relevance before clicking through.
The whole feed — titles, summaries and top comment highlights — is available in English, Chinese, Japanese, Korean, German, Spanish and Russian.
Every day gets a permanent page containing every story that hit the front page, retrievable long after the feed has moved on.
Daily AI papers are surfaced with translated titles and AI summaries, making Zeli a research reader as well as a news reader.
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.
Free / Open-sourceCompletely free PDF reading and editing tool with AI assistant, though basic compared to dedicated platforms.
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.
A proactive AI reading lens for papers, videos, and web pages
A proactive AI reading lens for papers, videos, and web pages
Free AI Summarizer for text, articles, URLs and images
Free AI Summarizer for text, articles, URLs and images
Includes robust developer APIs for custom document workflows, but free tier limits document page counts.
Strong multi-format document chat and form filling capabilities, but interface can feel slightly more cluttered.
Strong multi-format document chat and form filling capabilities, but interface can feel slightly more cluttered.
AI-powered platform to read, write, and stay current with research
Turn any long article or webpage into a clean, clickable summary in one click
Turn any long article or webpage into a clean, clickable summary in one click
SpecialistPrivate AI that answers from your own documents, on Mac and Windows
SpecialistPrivate AI that answers from your own documents, on Mac and Windows
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.
