ChatPDF vs PDF.ai (2026)
A side-by-side comparison of ChatPDF and PDF.ai on pricing, features, and fit, so you can decide which is right for you.
Freemium
Freemium
$5/month for Plus plan with higher limits and larger file support
From approximately $20/month for expanded document limits and priority processing
Free plan allows up to 2 PDFs per day, up to 120 pages each, and 50 questions per day
Limited free plan with a set number of pages and documents per month
★ 4.0 (0)
★ 4.0 (0)
Students summarizing textbooks and academic research papers before exams
Reviewing and querying legal contracts or agreements
Extremely easy to use with no technical setup required
Extremely easy to use with no technical setup required
Free tier has strict daily limits on file uploads and questions
Free tier has restrictive page and document upload limits
The verdict
Choose ChatPDF if
you mainly need to students summarizing textbooks and academic research papers before exams. Its edge: extremely easy to use with no technical setup required.
Choose PDF.ai if
you mainly need to reviewing and querying legal contracts or agreements. Its edge: extremely easy to use with no technical setup required.