Grammarly vs Synthesia
A detailed comparison to help you choose the right AI tool for your needs.
Feature Comparison
Feature
Grammarly
Synthesia
Ratings
Overall Rating
4.6
4.6
Coding
-
-
Writing
4.8
-
Reasoning
4.0
-
Speed
5.0
4.5
Value
4.5
4.4
Pricing
Monthly Price
$12
$22
Free Tier
Input (per 1M tokens)
-
-
Output (per 1M tokens)
-
-
Features
Context Window
50K
-
Vision/Images
Audio
Video
Code Generation
AI Agents
Grammarly
Pros
- Works everywhere (browser, desktop, mobile)
- Excellent grammar and spelling
- Tone detection
- Plagiarism checker
- GrammarlyGO AI assistant
Cons
- Not for creative writing
- Premium features require subscription
- Can be overly corrective
Synthesia
Pros
- Realistic AI avatars
- 140+ languages and voices
- No video production skills needed
- Fast turnaround
- Enterprise-ready with SOC 2 compliance
Cons
- Avatar-based only (no text-to-video)
- Limited creative flexibility
- Higher cost for heavy usage
- Avatars may feel uncanny to some viewers
Choose Grammarly if you need:
Grammar checking, professional emails, academic writing
Choose Synthesia if you need:
Training videos, corporate communications, localization
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.