Comparison
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 ChatPDF | not listed | yes | PDF & documents |
 UPDF | not listed | trial | PDF & documents |
 Humata | 9.99 USD/mo | yes | PDF & documents |
 iLovePDF | 5 EUR/mo | yes | PDF & documents |
 Chat With PDF by Copilot.us | not listed | ? | PDF & documents |
 LlamaParse | 50 USD/mo | yes | PDF & documents |
 QuillBot | not listed | ? | Writing & editing |
 Explainpaper | 16 USD/mo | yes | Research & science |
 GetPaperFast | 11.99 USD | yes | Research & science |
Each alternative in short
1. UPDF
AI-powered PDF editor for editing, converting, OCR, annotating and summarizing PDFs across desktop, mobile and web.
There is a free trial. Free download with a free version of the app; the homepage says you get access to all features for free after signing in. Exact limits are not stated in the provided text.
2. Humata
Upload documents and ask questions about them, getting answers with citations to the source files, for researchers, professionals and teams.
Yes, there is a free plan. Free plan: basic features, up to 60 pages, up to 10 answers.
3. iLovePDF
Online toolkit for merging, splitting, compressing, converting and editing PDF files, with some AI features for summarizing and translating.
Yes, there is a free plan. Basic plan: access to essential tools with limited document processing. Free tier also includes limited AI Summarizer and translation use.
4. Chat With PDF by Copilot.us
Chat with PDFs and Google Drive documents to get answers with page references, one of many productivity AI apps on Copilot.us.
The vendor does not state this clearly on the homepage or pricing page.
5. LlamaParse
Document parsing and extraction platform turning complex PDFs, Office files and scans into LLM-ready data, for developers and document-heavy teams.
Yes, there is a free plan. Free plan: 10,000 credits per month (about 1,000 pages), agentic OCR for layout-aware parsing, structured extraction of defined schemas, and building end-to-end document agents. Up to 100 users, basic support.
6. QuillBot
AI writing suite for paraphrasing, grammar checking, AI detection, and content creation, aimed at writers, students, and professionals.
The vendor does not state this clearly on the homepage or pricing page.
7. Explainpaper
AI reader that highlights confusing parts of research papers and explains them in simple language, for researchers and students.
Yes, there is a free plan. Free plan: unlimited highlight explanations, follow-up questions, Zotero library import, basic AI models. Pro offers a 7-day free trial (card on file).
8. GetPaperFast
Turns academic PDFs into structured summaries (background, methods, results, limitations) for researchers and students.
Yes, there is a free plan. 5 free credits, expiring after 30 days, with no payment required.
FAQ
What is the best alternative to ChatPDF?
The most popular option in the same category is UPDF. See the comparison table above.