Perplexity AI vs ChatGPT vs LightPDF vs MostlyAI
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
LightPDF
LightPDF
Competitor 3
MostlyAI
MostlyAICompare
4 tools · best value per row highlighted
Competitor
LightPDF
LightPDF
lightpdf.com
LightPDF AI for Docs is an online tool that utilizes artificial intelligence to summarize and extract insights from uploaded PDF, Word, Excel, and PPT documents. With multi-platform availability and s
Traffic estimated monthly website traffic
Monthly visits
95.2Mvisits/mo
5.6Bvisits/mo
1.8Mvisits/mo
43.5Kvisits/mo
MoM change
▼ 8.2%
▲ 3.5%
▲ 1.0%
▼ 22.5%
6-month growth
-42.9%
-1.6%
-4.4%
-35.7%
Global rank web
#446
#7
#34,433
#791,007
Avg. last 3 months
104.9M
5.5B
1.7M
55.6K
Bounce rate lower is better
33%
30%
51%
39%
Pages / visit
3.6
4.3
2.3
1.8
Visit duration
4m 18s
6m 35s
1m 31s
22s
Traffic sources
● Direct 94% · ● Referral 4%
● Direct 95% · ● Referral 3%
● Direct 88% · ● Referral 10%
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Perplexity AIChatGPTLightPDFMostlyAI
Pricing
Model
Freemium
Freemium
Freemium
Free
Starting price
$20per month · free tier available
$8per month · free tier available
$1.33per month · free tier available
Free
Free tier
Free trial
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API access
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Plans
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Free FreeGo $8/moPlus $20/moPro 5x $100/mo+1 more
Free FreeMonthly $5.99/moYearly $15.99/yrLifetime $39.99
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Capabilities input → output
Input
CodeDocumentsImagesText
AudioTextImagesDocumentsCode
Web pagesDocuments
TextData
Output
TextCode
TextImagesCodeAudio
Text
Data
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Advanced
Categories
Tasks what each tool can do · 0 shared · core partial
Tasks covered
10
19
9
6
Summarizing
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Chatbots
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Document summarization
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Research
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Search engine
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Writing
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AI search
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Data extraction
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Document data extraction
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PDF analysis
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Synthetic data
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Blogging
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Coding
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Copywriting
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Data analysis
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Email writing
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Essay writing
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Grammar checking
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Image generation
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Image to text
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OCR
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PDFs
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Research papers
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Text extraction
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Translations
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Code documentation
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Data anonymization
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Data privacy compliance
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Data science
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Debugging
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Community on aitoolstime
Rating
no ratings yet
4.34 ratings
no ratings yet
no ratings yet
Upvotes
▲ 3
▲ 17
▲ 0
▲ 0
Saves
0
4
0
0
Reviews
0
4
0
0
Prompts
1
17
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.