Updated March 2026 · Independent Analysis
GrammarlyvsSynthesia
Grammarly starts at $12/mo, 59% cheaper than Synthesia's $29/mo. Both rated 4.7/5 by users.
Grammarlyvs Synthesia
★ 4.7/5
Only in Grammarly
- ✦ Grammar checking
- ✦ Plagiarism detection
- ✦ Tone suggestions
✓ Free planFrom $12/mo(cheaper)30M+ users · est. 2009
Try Grammarly Free →
Synthesiavs Grammarly
★ 4.7/5
Only in Synthesia
- ✦ AI avatars
- ✦ 120+ languages
- ✦ Text-to-video
From $29/mo(pricier)50K+ users · est. 2017
Try Synthesia Free →Ratings Breakdown
Grammarly
4.7/5 avg
G2 Score4.7/5
Capterra Score4.7/5
G2 Rating4.7/5
Synthesia
4.7/5 avg
G2 Score4.7/5
Capterra Score4.7/5
G2 Rating4.7/5
Quick Stats
Feature Comparison
Grammarly uniquely offers Grammar checking, Plagiarism detection, Tone suggestions. Synthesia uniquely offers AI avatars, 120+ languages, Text-to-video. Both share 0 features.
Feature
Grammarly
Synthesia
Grammar checking
✓
✗
Plagiarism detection
✓
✗
Tone suggestions
✓
✗
Style improvements
✓
✗
Browser extension
✓
✗
MS Office plugin
✓
✗
Mobile app
✓
✗
Team style guide
✓
✗
AI avatars
✗
✓
120+ languages
✗
✓
Text-to-video
✗
✓
Custom avatars
✗
✓
Brand templates
✗
✓
Screen recording
✗
✓
Auto captions
✗
✓
PPT integration
✗
✓
Team collaboration
✗
✓
API access
✗
✓
Analytics
✗
✓
SCORM export
✗
✓
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 Synthesia if you need:
- ✓ AI avatars
- ✓ 120+ languages
- ✓ Text-to-video
- ✓ Custom avatars
- ✓ Brand templates
Pricing Comparison
Grammarly starts at $12/mo, 59% cheaper than Synthesia's $29/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
Synthesia Plans
Paid plans only
StarterBest Value
$29/mo- • 10 video credits/mo
- • 90+ avatars
- • 60+ languages
Creator
$89/mo- • 30 video credits/mo
- • Custom avatar
- • Brand templates
Enterprise
Custom- • Custom credits
- • SSO
- • Dedicated support
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