QuillBot vs Spinbot vs GPTZero vs Undetectable AI

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

Your tool
QuillBot
vs
Competitor 1
Spinbot
Competitor 2
GPTZero
Competitor 3
Undetectable AI
Compare
4 tools · best value per row highlighted
Your tool QuillBot
quillbot.com
Rephrase until it sounds right
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Competitor Spinbot
spinbot.com
SpinBot is a free online article spinner and paraphrasing tool that rewrites readable text into new wording.
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
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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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Traffic estimated monthly website traffic
Monthly visits
31.4Mvisits/mo
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11Mvisits/mo
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MoM change
▼ 8.4%
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6-month growth
-27.9%
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Global rank web
#1,318
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Avg. last 3 months
36.7M
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11M
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Bounce rate lower is better
46%
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Pages / visit
5.5
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Visit duration
2m 52s
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Traffic sources
● Direct 76% · ● Referral 22%
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QuillBotSpinbotGPTZeroUndetectable AI
014.9M29.9M44.8M59.8MQuillBot · 59.8MQuillBot · 47MQuillBot · 42.9MQuillBot · 43.5MQuillBot · 49.6MQuillBot · 48.1MQuillBot · 44.6MQuillBot · 34.3MQuillBot · 31.4MGPTZero · 11M10M100MQuillBot · 59.8MQuillBot · 47MQuillBot · 42.9MQuillBot · 43.5MQuillBot · 49.6MQuillBot · 48.1MQuillBot · 44.6MQuillBot · 34.3MQuillBot · 31.4MGPTZero · 11MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Free
Freemium
Paid
Starting price
$19.95per month · free tier available
Free
$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
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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
ImagesTextDocuments
Text
TextDocuments
TextImagesDocuments
Output
TextSlidesImagesDocuments
Text
TextData
TextData
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+5 more
Writing & ContentAI Grammar CheckerAI Rewriter
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
9
4
7
10
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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Plagiarism detection
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Undetectable content writing
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Writing
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Text humanization
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Hallucination detection
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Humanizing AI text
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Image authenticity analysis
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Summarizing
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Audio detection
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Content authenticity verification
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Document summarization
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Edited image detection
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Phrase variation
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Proofreading
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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
▲ 2
▲ 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.