Updated March 2026 · Independent Analysis
GrammarlyvsAI21 Studio
Grammarly starts at $12/mo, 69% cheaper than AI21 Studio's $39/mo. Grammarly is rated higher at 4.7/5 vs AI21 Studio's 4.4/5.
Grammarlyvs AI21 Studio
★ 4.7/5+0.3 vs AI21 Studio
Only in Grammarly
- ✦ Grammar checking
- ✦ Plagiarism detection
- ✦ Tone suggestions
✓ Free planFrom $12/mo(cheaper)30M+ users · est. 2009
Try Grammarly Free →
AI21 Studiovs Grammarly
★ 4.4/5-0.3 vs Grammarly
Only in AI21 Studio
- ✦ Jurassic-2 models
- ✦ Text generation
- ✦ Summarization
✓ Free planFrom $39/mo(pricier)500K+ users · est. 2017
Try AI21 Studio Free →Ratings Breakdown
Grammarly
4.7/5 avg
G2 Score4.7/5
Capterra Score4.7/5
G2 Rating4.7/5
AI21 Studio
4.4/5 avg
G2 Score4.4/5
Capterra Score4.3/5
G2 Rating4.4/5
Quick Stats
Free Plan
GrammarlyYes ✓
AI21 StudioYes ✓
Feature Comparison
Grammarly uniquely offers Grammar checking, Plagiarism detection, Tone suggestions. AI21 Studio uniquely offers Jurassic-2 models, Text generation, Summarization. Both share 0 features.
Feature
Grammarly
AI21 Studio
Grammar checking
✓
✗
Plagiarism detection
✓
✗
Tone suggestions
✓
✗
Style improvements
✓
✗
Browser extension
✓
✗
MS Office plugin
✓
✗
Mobile app
✓
✗
Team style guide
✓
✗
Jurassic-2 models
✗
✓
Text generation
✗
✓
Summarization
✗
✓
Paraphrasing API
✗
✓
Contextual answers
✗
✓
Custom model tuning
✗
✓
Segmentation
✗
✓
Task-specific APIs
✗
✓
Playground
✗
✓
Fine-tuning
✗
✓
Document understanding
✗
✓
RAG capabilities
✗
✓
Total Features
8
12
Quick Verdict
Independent analysis based on features, pricing, and user ratings
Choose Grammarly if you need:
- ✓ Grammar checking
- ✓ Plagiarism detection
- ✓ Tone suggestions
- ✓ Style improvements
- ✓ Browser extension
Choose AI21 Studio if you need:
- ✓ Jurassic-2 models
- ✓ Text generation
- ✓ Summarization
- ✓ Paraphrasing API
- ✓ Contextual answers
Pricing Comparison
Grammarly starts at $12/mo, 69% cheaper than AI21 Studio's $39/mo.
Grammarly Plans
Free tier available
Free
Free- • Basic grammar
- • Spelling
- • Punctuation
PremiumBest Value
$12/month- • Style suggestions
- • Tone detection
- • Plagiarism checker
- • Full rewrites
Business
$15/month- • Team features
- • Style guide
- • Analytics
- • Priority support
AI21 Studio Plans
Free tier available
Free
Free- • $10 free credits
- • Playground access
- • Basic APIs
TeamsBest Value
$39/mo- • Production APIs
- • Fine-tuning
- • Team collaboration
Enterprise
Custom- • Custom models
- • SLA
- • Dedicated support
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