Grammarly vs QuillBot vs Undetectable AI vs Originality.AI
Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.
Your tool
Grammarly
vs Grammarly
Competitor 1
QuillBot
QuillBot
Competitor 2
Undetectable AI
Undetectable AI
Competitor 3
Originality.AI
Originality.AICompare
4 tools · best value per row highlighted
Competitor
Undetectable AI
Undetectable AI
undetectable.ai
Undetectable AI bundles an AI text detector, an AI humanizer and an AI image detector into one account.
Traffic estimated monthly website traffic
Monthly visits
49.3Mvisits/mo
31.4Mvisits/mo
—
1.7Mvisits/mo
MoM change
▲ 10.8%
▼ 8.4%
—
▼ 3.1%
6-month growth
-22.5%
-27.9%
—
-37.9%
Global rank web
#688
#1,318
—
#37,307
Avg. last 3 months
46.5M
36.7M
—
1.8M
Bounce rate lower is better
40%
46%
—
56%
Pages / visit
7.8
5.5
—
2.5
Visit duration
4m 41s
2m 52s
—
2m 31s
Traffic sources
● Direct 85% · ● Referral 9%
● Direct 76% · ● Referral 22%
—
● Direct 86% · ● Referral 13%
GrammarlyQuillBotUndetectable AIOriginality.AI
Pricing
Model
Freemium
Freemium
Paid
Freemium
Starting price
$12per month · free tier available
$19.95per month · free tier available
$5per month
$12.95per month · free tier available
Free tier
–
Free trial
–
–
API access
–
–
–
Plans
Free FreePro Custom/moEnterprise Custom/mo
—
10K words $5/mo20K words $9.50/mo35K words $15.75/mo50K words $21.25/mo+1 more
Basic FreePro $12.95/moEnterprise $136.58/mo
Capabilities input → output
Input
Text
DocumentsImagesText
TextImagesDocuments
DocumentsWeb pagesText
Output
Text
DocumentsImagesSlidesText
TextData
TextData
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Intermediate
Categories
Tasks what each tool can do · 1 shared · core partial
Tasks covered
6
9
10
8
Detection
Plagiarism detection
–
Proofreading
–
Paraphrasing
–
–
Content detection
–
–
Grammar checking
–
–
Writing
–
–
Undetectable content writing
–
–
AI authorship detection
–
–
–
Text humanization
–
–
–
Content authenticity verification
–
–
–
Humanizing AI text
–
–
–
Image authenticity analysis
–
–
–
Summarizing
–
–
–
Audio detection
–
–
–
Document summarization
–
–
–
Edited image detection
–
–
–
Editorial fact checking
–
–
–
Fact checking
–
–
–
SEO
–
–
–
Text enhancement
–
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 2
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
Verified listing
–
–
–
–
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.