Copyleaks vs Undetectable AI vs Grammarly vs QuillBot

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

Your tool
Copyleaks
vs
Competitor 1
Undetectable AI
Competitor 2
Grammarly
Competitor 3
QuillBot
Compare
4 tools · best value per row highlighted
Your tool Copyleaks
copyleaks.com
Copyleaks is a content authenticity platform that checks whether text was written by AI and whether it copies existing sources.
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Competitor Undetectable AI
undetectable.ai
Undetectable AI bundles an AI text detector, an AI humanizer and an AI image detector into one account.
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Competitor Grammarly
grammarly.com
Writing confidence that follows you everywhere
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Competitor QuillBot
quillbot.com
Rephrase until it sounds right
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Traffic estimated monthly website traffic
Monthly visits
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49.3Mvisits/mo
31.4Mvisits/mo
MoM change
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▲ 10.8%
▼ 8.4%
6-month growth
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-22.5%
-27.9%
Global rank web
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#688
#1,318
Avg. last 3 months
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46.5M
36.7M
Bounce rate lower is better
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40%
46%
Pages / visit
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7.8
5.5
Visit duration
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4m 41s
2m 52s
Traffic sources
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● Direct 85% · ● Referral 9%
● Direct 76% · ● Referral 22%
CopyleaksUndetectable AIGrammarlyQuillBot
015.9M31.8M47.7M63.6MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MQuillBot · 59.8MQuillBot · 47MQuillBot · 42.9MQuillBot · 43.5MQuillBot · 49.6MQuillBot · 48.1MQuillBot · 44.6MQuillBot · 34.3MQuillBot · 31.4M10M100MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MQuillBot · 59.8MQuillBot · 47MQuillBot · 42.9MQuillBot · 43.5MQuillBot · 49.6MQuillBot · 48.1MQuillBot · 44.6MQuillBot · 34.3MQuillBot · 31.4MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Paid
Paid
Freemium
Freemium
Starting price
$13.99per month
$5per month
$12per month · free tier available
$19.95per month · free tier available
Free tier
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Free trial
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API access
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Plans
Personal $13.99/moPro $74.99/moEnterprise CustomEducation Custom
10K words $5/mo20K words $9.50/mo35K words $15.75/mo50K words $21.25/mo+1 more
Free FreePro Custom/moEnterprise Custom/mo
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Capabilities input → output
Input
DocumentsVideoTextImagesCode
TextImagesDocuments
Text
TextImagesDocuments
Output
Data
TextData
Text
TextSlidesImagesDocuments
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
AI Detection & SafetyAI DetectorAI Image DetectorAI Plagiarism Checker
AI Detection & SafetyAI DetectorAI Image DetectorHumanizer AI
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+4 more
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+5 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
10
10
6
9
Detection
Plagiarism detection
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Grammar checking
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AI authorship detection
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Paraphrasing
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Content detection
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Writing
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Image authenticity analysis
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Proofreading
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Undetectable content writing
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Text humanization
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Content authenticity verification
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Humanizing AI text
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Summarizing
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APIs
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Audio detection
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Content moderation
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Deepfake detection
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Document summarization
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Edited image detection
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Text enhancement
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
▲ 2
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
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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.