Grammarly vs Originality.AI vs ZeroGPT 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
Originality.AI
Competitor 2
ZeroGPT
Competitor 3
Undetectable AI
Compare
4 tools · best value per row highlighted
Your tool Grammarly
grammarly.com
Writing confidence that follows you everywhere
Remove
Competitor Originality.AI
originality.ai
Make main Remove
Competitor ZeroGPT
zerogpt.com
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
1.7Mvisits/mo
20.5Mvisits/mo
—
MoM change
▲ 10.8%
▼ 3.1%
▲ 5.1%
—
6-month growth
-22.5%
-37.9%
-29.5%
—
Global rank web
#688
#37,307
#3,675
—
Avg. last 3 months
46.5M
1.8M
20.5M
—
Bounce rate lower is better
40%
56%
60%
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Pages / visit
7.8
2.5
2.2
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Visit duration
4m 41s
2m 31s
2m 53s
—
Traffic sources
● Direct 85% · ● Referral 9%
● Direct 86% · ● Referral 13%
● Direct 90% · ● Referral 9%
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GrammarlyOriginality.AIZeroGPTUndetectable AI
015.9M31.8M47.7M63.6MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MOriginality.AI · 2.6MOriginality.AI · 2.5MOriginality.AI · 2.2MOriginality.AI · 2.2MOriginality.AI · 2.7MOriginality.AI · 2.5MOriginality.AI · 2.4MOriginality.AI · 1.9MOriginality.AI · 1.7MOriginality.AI · 1.7MZeroGPT · 29.3MZeroGPT · 23.5MZeroGPT · 20.6MZeroGPT · 23.3MZeroGPT · 29.1MZeroGPT · 28.2MZeroGPT · 26.3MZeroGPT · 21.4MZeroGPT · 19.5MZeroGPT · 20.5M1M10M100MGrammarly · 58.8MGrammarly · 54.5MGrammarly · 55.9MGrammarly · 55.7MGrammarly · 63.6MGrammarly · 58.3MGrammarly · 54MGrammarly · 45.8MGrammarly · 44.5MGrammarly · 49.3MOriginality.AI · 2.6MOriginality.AI · 2.5MOriginality.AI · 2.2MOriginality.AI · 2.2MOriginality.AI · 2.7MOriginality.AI · 2.5MOriginality.AI · 2.4MOriginality.AI · 1.9MOriginality.AI · 1.7MOriginality.AI · 1.7MZeroGPT · 29.3MZeroGPT · 23.5MZeroGPT · 20.6MZeroGPT · 23.3MZeroGPT · 29.1MZeroGPT · 28.2MZeroGPT · 26.3MZeroGPT · 21.4MZeroGPT · 19.5MZeroGPT · 20.5MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Paid
Paid
Starting price
$12per month · free tier available
$12.95per month · free tier available
$7.99per month
$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 FreePro $12.95/moEnterprise $136.58/mo
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10K words $5/mo20K words $9.50/mo35K words $15.75/mo50K words $21.25/mo+1 more
Capabilities input → output
Input
Text
TextWeb pagesDocuments
DocumentsImagesTextVideo
TextImagesDocuments
Output
Text
TextData
Text
TextData
Skill level
Beginner-friendly
Intermediate
Beginner-friendly
Beginner-friendly
Categories
AI Detection & SafetyWriting & ContentAI DetectorAI Grammar Checker+4 more
AI Detection & SafetyAI DetectorAI Plagiarism Checker
AI Detection & SafetyAI DetectorAI Image DetectorAI Plagiarism Checker+1 more
AI Detection & SafetyAI DetectorAI Image DetectorHumanizer AI
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
6
8
2
3
Detection
Plagiarism detection
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Proofreading
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Grammar checking
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Paraphrasing
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Writing
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–
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Content authenticity verification
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Content detection
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Image authenticity analysis
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Audio detection
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Editorial fact checking
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Fact checking
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–
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SEO
–
–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 0
▲ 0
▲ 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.