Grammarly vs Wordtune vs GPTZero vs Undetectable AI

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

Your tool
Grammarly
vs
Competitor 1
Wordtune
Competitor 2
GPTZero
Competitor 3
Undetectable AI
Compare
4 tools · best value per row highlighted
Your tool Grammarly
grammarly.com
Writing confidence that follows you everywhere
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Competitor Wordtune
wordtune.com
Rewrite sentences without rewriting them yourself
Make main Remove
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
Make main Remove
Competitor Undetectable AI
undetectable.ai
Undetectable AI bundles an AI text detector, an AI humanizer and an AI image detector into one account.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
49.3Mvisits/mo
371Kvisits/mo
11Mvisits/mo
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MoM change
▲ 10.8%
▼ 9.6%
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6-month growth
-22.5%
-50.1%
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Global rank web
#688
#113,516
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Avg. last 3 months
46.5M
410K
11M
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Bounce rate lower is better
40%
49%
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Pages / visit
7.8
3.0
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Visit duration
4m 41s
56s
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Traffic sources
● Direct 85% · ● Referral 9%
● Direct 75% · ● Referral 15%
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GrammarlyWordtuneGPTZeroUndetectable AI
015.9M31.8M47.7M63.6MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MWordtune · 848.2KWordtune · 809KWordtune · 789.1KWordtune · 645KWordtune · 744.1KWordtune · 685.6KWordtune · 555.2KWordtune · 448.8KWordtune · 410.3KWordtune · 371KGPTZero · 11M100K1M10M100MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MWordtune · 848.2KWordtune · 809KWordtune · 789.1KWordtune · 645KWordtune · 744.1KWordtune · 685.6KWordtune · 555.2KWordtune · 448.8KWordtune · 410.3KWordtune · 371KGPTZero · 11MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Paid
Starting price
$12per month · free tier available
$4.89per month · free tier available
$12.99per month · free tier available
$5per month
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
Basic FreeAdvanced $6.99/moUnlimited $9.99/mo
Free FreePremium $12.99/moProfessional $24.99/mo
10K words $5/mo20K words $9.50/mo35K words $15.75/mo50K words $21.25/mo+1 more
Capabilities input → output
Input
Text
Text
DocumentsText
DocumentsImagesText
Output
Text
Text
DataText
DataText
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+4 more
Writing & ContentAI Grammar CheckerAI RewriterAI Writing Assistants
AI Detection & SafetyAI DetectorAI Plagiarism Checker
AI Detection & SafetyAI DetectorAI Image DetectorHumanizer AI
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
10
7
3
Detection
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Grammar checking
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Paraphrasing
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Writing
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Plagiarism detection
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AI authorship detection
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Chrome extensions
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Content detection
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Content translation
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Hallucination detection
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Image authenticity analysis
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Language refinement
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Paragraph restructuring
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Proofreading
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Translations
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Audio detection
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Content authenticity verification
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Email writing
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Summarizing
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 0
▲ 1
▲ 0
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.