Perplexity AI vs ChatGPT vs PDF.ai vs DeepSeek
Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.
Your tool
Perplexity AI
vs Perplexity AI
Competitor 1
ChatGPT
ChatGPT
Competitor 2
PDF.ai
PDF.ai
Competitor 3
DeepSeek
DeepSeekCompare
4 tools · best value per row highlighted
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
95.2Mvisits/mo
5.6Bvisits/mo
—
353.8Mvisits/mo
MoM change
▼ 8.2%
▲ 3.5%
—
▲ 2.1%
6-month growth
-42.9%
-1.6%
—
+0.9%
Global rank web
#446
#7
—
#131
Avg. last 3 months
104.9M
5.5B
—
357.9M
Bounce rate lower is better
33%
30%
—
38%
Pages / visit
3.6
4.3
—
3.4
Visit duration
4m 18s
6m 35s
—
5m 33s
Traffic sources
● Direct 94% · ● Referral 4%
● Direct 95% · ● Referral 3%
—
● Direct 95% · ● Referral 4%
Perplexity AIChatGPTPDF.aiDeepSeek
Pricing
Model
Freemium
Freemium
Freemium
Freemium
Starting price
$20per month · free tier available
$8per month · free tier available
$49per month · free tier available
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Free tier
–
Free trial
–
–
–
–
API access
–
–
Plans
—
Free FreeGo $8/moPlus $20/moPro 5x $100/mo+1 more
Free FreeStarter $49/moPro $99/moScale $249/mo+1 more
deepseek-flash Customdeepseek-v4-pro Custom
Capabilities input → output
Input
CodeDocumentsImagesText
AudioTextImagesDocumentsCode
TextDocuments
TextImagesCode
Output
CodeText
TextImagesCodeAudio
TextData
TextCode
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
Tasks what each tool can do · 0 shared · core partial
Tasks covered
10
19
2
9
Chatbots
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Research
–
Summarizing
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Writing
–
Document summarization
–
–
Search engine
–
–
Coding
–
–
Translations
–
–
Homework assistance
–
–
AI search
–
–
–
Large language models
–
–
–
Blogging
–
–
–
Copywriting
–
–
–
Document data extraction
–
–
–
Email writing
–
–
–
Essay writing
–
–
–
Grammar checking
–
–
–
Image generation
–
–
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Image to text
–
–
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Research papers
–
–
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Code documentation
–
–
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Debugging
–
–
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Image editing
–
–
–
Image to image
–
–
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Literature reviews
–
–
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Math
–
–
–
Refactoring
–
–
–
Community on aitoolstime
Rating
no ratings yet
4.34 ratings
no ratings yet
no ratings yet
Upvotes
▲ 3
▲ 17
▲ 0
▲ 3
Saves
0
4
0
0
Reviews
0
4
0
0
Prompts
1
17
0
0
Verified listing
–
–
–
–
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.