Grammarly vs LanguageTool vs Undetectable AI vs QuillBot

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

Your tool
Grammarly
vs
Competitor 1
LanguageTool
Competitor 2
Undetectable AI
Competitor 3
QuillBot
Compare
4 tools · best value per row highlighted
Your tool Grammarly
grammarly.com
Writing confidence that follows you everywhere
Remove
Competitor LanguageTool
languagetool.org
LanguageTool checks grammar, spelling, punctuation, casing and style as you write, and works in more than 30 languages and dialects, including English, German, Portuguese, Spanish, French and Dutch.
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
Competitor QuillBot
quillbot.com
Rephrase until it sounds right
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
49.3Mvisits/mo
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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
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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%
GrammarlyLanguageToolUndetectable AIQuillBot
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
Freemium
Free
Paid
Freemium
Starting price
$12per month · free tier available
Free
$5per month
$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 Free
10K words $5/mo20K words $9.50/mo35K words $15.75/mo50K words $21.25/mo+1 more
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Capabilities input → output
Input
Text
Text
DocumentsImagesText
DocumentsImagesText
Output
Text
Text
DataText
DocumentsImagesSlidesText
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 Image DetectorHumanizer AI
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+5 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
10
10
9
Grammar checking
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Paraphrasing
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Detection
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Writing
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Proofreading
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Plagiarism detection
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Undetectable content writing
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AI authorship detection
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Content detection
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Text humanization
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Humanizing AI text
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Image authenticity analysis
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Multilingual grammar assistance
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Summarizing
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Audio detection
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Document summarization
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Dutch text correction
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Edited image detection
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French grammar checking
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French text correction
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Multilingual writing assistance
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Spanish text correction
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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
▲ 1
▲ 0
▲ 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.