Grammarly vs GPTZero vs Turnitin vs QuillBot

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

Your tool
Grammarly
vs
Competitor 1
GPTZero
Competitor 2
Turnitin
Competitor 3
QuillBot
Compare
4 tools · best value per row highlighted
Your tool Grammarly
grammarly.com
Writing confidence that follows you everywhere
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Competitor GPTZero
gptzero.me
Used by over 10 million teachers and students across more than 100 countries, GPTZero detects AI-generated text across major language models while providing a suite of writing verification tools
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Competitor Turnitin
turnitin.com
Turnitin is an academic integrity suite that schools, universities, and research organizations use to verify originality and deal with AI-written text.
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Competitor QuillBot
quillbot.com
Rephrase until it sounds right
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Traffic estimated monthly website traffic
Monthly visits
49.3Mvisits/mo
11Mvisits/mo
—
31.4Mvisits/mo
MoM change
▲ 10.8%
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▼ 8.4%
6-month growth
-22.5%
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-27.9%
Global rank web
#688
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#1,318
Avg. last 3 months
46.5M
11M
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36.7M
Bounce rate lower is better
40%
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46%
Pages / visit
7.8
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5.5
Visit duration
4m 41s
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2m 52s
Traffic sources
● Direct 85% · ● Referral 9%
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● Direct 76% · ● Referral 22%
GrammarlyGPTZeroTurnitinQuillBot
015.9M31.8M47.7M63.6MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MGPTZero · 11MQuillBot · 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 · 49.3MGPTZero · 11MQuillBot · 59.8MQuillBot · 47MQuillBot · 42.9MQuillBot · 43.5MQuillBot · 49.6MQuillBot · 48.1MQuillBot · 44.6MQuillBot · 34.3MQuillBot · 31.4MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
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Freemium
Starting price
$12per month · free tier available
$12.99per month · free tier available
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$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
Free FreePro Custom/moEnterprise Custom/mo
Free FreePremium $12.99/moProfessional $24.99/mo
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Capabilities input → output
Input
Text
DocumentsText
DocumentsText
DocumentsImagesText
Output
Text
DataText
Data
DocumentsImagesSlidesText
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+4 more
AI Detection & SafetyAI DetectorAI Plagiarism Checker
AI Detection & SafetyAI DetectorAI Plagiarism Checker
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+5 more
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
6
7
8
9
Plagiarism detection
Detection
Grammar checking
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AI authorship detection
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Paraphrasing
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Writing
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Content detection
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Proofreading
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Content authenticity verification
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Exam cheating
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Hallucination detection
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Summarizing
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Academic integrity advising
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Document summarization
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Exam grading
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Undetectable content writing
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 1
▲ 0
▲ 2
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.