Synthesia vs Grammarly
A detailed comparison to help you choose the right AI tool for your needs.
Feature Comparison
Feature
Synthesia
Grammarly
Ratings
Overall Rating
4.6
4.6
Coding
-
-
Writing
-
4.8
Reasoning
-
4.0
Speed
4.5
5.0
Value
4.4
4.5
Pricing
Monthly Price
$22
$12
Free Tier
Input (per 1M tokens)
-
-
Output (per 1M tokens)
-
-
Features
Context Window
-
50K
Vision/Images
Audio
Video
Code Generation
AI Agents
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
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
Choose Synthesia if you need:
Training videos, corporate communications, localization
Choose Grammarly if you need:
Grammar checking, professional emails, academic writing
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.