ChatPDF vs Perplexity AI vs Collate vs ReadDocs

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

Your tool
ChatPDF
vs
Competitor 1
Perplexity AI
Competitor 2
Collate
Competitor 3
ReadDocs
Compare
4 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 Perplexity AI
perplexity.ai
Search that gives answers instead of links
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Competitor Collate
collate.one
Collate is a free, offline PDF assistant designed for everyday learners, students, and professionals who want to take control of their PDFs. With Collate, you can: • Summarize PDFs: Turn lengthy doc
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Competitor ReadDocs
readdocs.co.uk
Upload a PDF contract and ReadDocs spits out a one-minute summary, bullet points, and answers to specific questions you ask
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Traffic estimated monthly website traffic
Monthly visits
—
95.2Mvisits/mo
4.1Kvisits/mo
744visits/mo
MoM change
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▼ 8.2%
▼ 59.8%
▲ 141.6%
6-month growth
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-42.9%
-0.1%
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Global rank web
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#446
#4,822,608
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Avg. last 3 months
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104.9M
8.9K
384
Bounce rate lower is better
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33%
37%
39%
Pages / visit
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3.6
1.3
1.1
Visit duration
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4m 18s
2s
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Traffic sources
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● Direct 94% · ● Referral 4%
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ChatPDFPerplexity AICollateReadDocs
047.3M94.5M141.8M189MPerplexity AI · 189MPerplexity AI · 179.6MPerplexity AI · 170.1MPerplexity AI · 153.8MPerplexity AI · 166.8MPerplexity AI · 154.9MPerplexity AI · 138.1MPerplexity AI · 115.8MPerplexity AI · 103.8MPerplexity AI · 95.2MCollate · 10.2KCollate · 7.2KCollate · 5.3KCollate · 4.1KCollate · 6KCollate · 13.1KCollate · 12.4KCollate · 10.2KCollate · 4.1KReadDocs · 101ReadDocs · 308ReadDocs · 7441001K10K100K1M10M100M1BPerplexity AI · 189MPerplexity AI · 179.6MPerplexity AI · 170.1MPerplexity AI · 153.8MPerplexity AI · 166.8MPerplexity AI · 154.9MPerplexity AI · 138.1MPerplexity AI · 115.8MPerplexity AI · 103.8MPerplexity AI · 95.2MCollate · 10.2KCollate · 7.2KCollate · 5.3KCollate · 4.1KCollate · 6KCollate · 13.1KCollate · 12.4KCollate · 10.2KCollate · 4.1KReadDocs · 101ReadDocs · 308ReadDocs · 744Nov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
Freemium
Freemium
Freemium
Starting price
Free
$20per month · free tier available
$9.99per month · free tier available
Free tier
Free tier
Free trial
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API access
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Plans
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Free Custom
Free FreePro £9.99/moBusiness £29/mo
Capabilities input → output
Input
DocumentsTextWeb pages
CodeDocumentsImagesText
Documents
DocumentsImagesText
Output
Text
CodeText
Text
Text
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
Education & LearningProductivity & OfficeResearch & AnalyticsWriting & Content+4 more
Chatbots & CompanionsEducation & LearningLifestyle & EntertainmentProductivity & Office+13 more
Productivity & OfficeWriting & ContentAI PDFAI Summarizer
Productivity & OfficeWriting & ContentAI PDFAI Summarizer
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
12
10
10
13
Summarizing
Document summarization
PDF summaries
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Interactive PDF processing
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PDF analysis
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Summaries
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Document chat
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PDFs
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Research
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Document reading
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Homework assistance
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AI search
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Document q a
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Document summaries
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Search engine
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Chatbots
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Local AI
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OCR
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Official documents q a
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PDF translations
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Research papers
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Academic research
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Literature reviews
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Meeting summaries
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Writing
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YouTube summaries
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 3
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
1
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.