ChatPDF vs Knowt vs KnoWhiz vs PDF.ai
Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.
Your tool
ChatPDF
vs ChatPDF
Competitor 1
Knowt
Knowt
Competitor 2
KnoWhiz
KnoWhiz
Competitor 3
PDF.ai
PDF.aiCompare
4 tools · best value per row highlighted
Your tool
ChatPDF
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.
Competitor
PDF.ai
PDF.ai
pdf.ai
PDF.ai lets you chat with any PDF: ask questions, get summaries and find answers inside the document.
Traffic estimated monthly website traffic
Monthly visits
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2.3Mvisits/mo
5Kvisits/mo
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MoM change
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▲ 27.1%
▼ 4.2%
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6-month growth
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-36.9%
-56.5%
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Global rank web
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#29,000
#3,544,642
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Avg. last 3 months
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2.1M
6.9K
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Bounce rate lower is better
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34%
38%
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Pages / visit
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4.6
1.9
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Visit duration
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5m 28s
22s
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Traffic sources
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● Direct 93% · ● Referral 6%
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ChatPDFKnowtKnoWhizPDF.ai
Pricing
Model
Free
Freemium
Freemium
Freemium
Starting price
Free
$4per month · free tier available
$1.99per month · free tier available
$49per month · free tier available
Free tier
Free trial
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API access
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–
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Plans
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Free FreeUltra (School License) $4/yr
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Free FreeStarter $49/moPro $99/moScale $249/mo+1 more
Capabilities input → output
Input
Web pagesTextDocuments
Web pagesTextDocumentsAudio
Web pagesVideoDocuments
TextDocuments
Output
Text
TextAudio
Text
TextData
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
Tasks what each tool can do · 0 shared · core partial
Tasks covered
12
5
4
10
Flashcards
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Interactive PDF processing
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PDF analysis
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PDFs
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PDF summaries
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Quiz generation
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Summarizing
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Document data extraction
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APIs
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Data extraction
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Document processing
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Document summarization
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Note taking
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OCR
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PDF translations
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Research
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Study assistance
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Tutoring
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Academic research
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Document reading
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Education
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Homework assistance
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Podcasts
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Summaries
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
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.