ChatPDF vs KnoWhiz vs UPDF

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
ChatPDF
vs
Competitor 1
KnoWhiz
Competitor 2
UPDF
Competitor 3
Suggested competitors for ChatPDF: Humata84% Smallpdf AI PDF83% APAI PDF Reader83% Collate83% PDF.ai82% ReadDocs80% LightPDF79% PDFConvo78%
Compare
3 tools · best value per row highlighted
Your tool ChatPDF
chatpdf.com
ChatPDF is a document question-answering app: upload a PDF, ask questions in plain language, and get answers with built-in citations that point back to the source passage.
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Competitor KnoWhiz
knowhiz.us
Make main Remove
Competitor UPDF
pdfassistant.ai
PDFs that work the way you need them to
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Traffic estimated monthly website traffic
Monthly visits
—
5Kvisits/mo
28.7Kvisits/mo
MoM change
—
▼ 4.2%
▼ 28.2%
6-month growth
—
-56.5%
-27.5%
Global rank web
—
#3,544,642
#984,401
Avg. last 3 months
—
6.9K
40.4K
Bounce rate lower is better
—
38%
42%
Pages / visit
—
1.9
2.1
Visit duration
—
22s
19s
Traffic sources
—
—
● Direct 90% · ● Mail 10%
ChatPDFKnoWhizUPDF
015.8K31.5K47.3K63KKnoWhiz · 706KnoWhiz · 3.8KKnoWhiz · 14.3KKnoWhiz · 14.7KKnoWhiz · 11.5KKnoWhiz · 10.5KKnoWhiz · 13KKnoWhiz · 10.4KKnoWhiz · 5.2KKnoWhiz · 5KUPDF · 38.9KUPDF · 51.3KUPDF · 45.4KUPDF · 39.5KUPDF · 52.9KUPDF · 63KUPDF · 52.7KUPDF · 39.9KUPDF · 28.7K1001K10K100KKnoWhiz · 706KnoWhiz · 3.8KKnoWhiz · 14.3KKnoWhiz · 14.7KKnoWhiz · 11.5KKnoWhiz · 10.5KKnoWhiz · 13KKnoWhiz · 10.4KKnoWhiz · 5.2KKnoWhiz · 5KUPDF · 38.9KUPDF · 51.3KUPDF · 45.4KUPDF · 39.5KUPDF · 52.9KUPDF · 63KUPDF · 52.7KUPDF · 39.9KUPDF · 28.7KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
Freemium
Freemium
Starting price
Free
$1.99per month · free tier available
$9.99per month · free tier available
Free tier
Free trial
–
–
–
API access
–
–
–
Plans
—
—
Starter FreePlus $9.99/moPro $24.99/moBusiness $59.99/mo+1 more
Capabilities input → output
Input
DocumentsTextWeb pages
DocumentsWeb pagesVideo
DocumentsText
Output
Text
Text
DocumentsText
Skill level
Beginner-friendly
Beginner-friendly
Intermediate
Categories
Education & LearningProductivity & OfficeResearch & AnalyticsWriting & Content+4 more
Education & LearningAI CourseAI Flashcard MakerAI Quiz Generator
Productivity & OfficeAI Document ExtractionAI PDF
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
12
4
14
PDF analysis
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PDFs
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Interactive PDF processing
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PDF summaries
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Document summarization
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Document editing
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–
Flashcards
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–
PDF management
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–
Quiz generation
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Document scanning
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–
File conversion
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PDF translations
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Research
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–
Study assistance
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Summarizing
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–
Text extraction
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–
Tutoring
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–
Academic research
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–
Document analysis
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–
Document data extraction
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–
Document reading
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–
Homework assistance
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–
PDF compression
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–
PDF redaction
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Summaries
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–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
Saves
0
0
0
Reviews
0
0
0
Prompts
0
0
0
Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.