Grammarly
Sudowrite
| Feature | Grammarly | Sudowrite |
|---|---|---|
| Pricing | Free / from $12/mo | From $19/mo |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.5 / 5 | 4.2 / 5 |
| Best For | writers, students, professionals, non-native-speakers | novelists, screenwriters, fiction-writers, creative-writers |
| Founded | 2009 | 2020 |
| Grammar | ✓ | ✗ |
| Spelling | ✓ | ✗ |
| Tone | ✓ | ✗ |
| Clarity | ✓ | ✗ |
| Plagiarism | ✓ | ✗ |
| Browser Extension | ✓ | ✗ |
| Story Engine | ✗ | ✓ |
| Describe | ✗ | ✓ |
| Brainstorm | ✗ | ✓ |
| Expand | ✗ | ✓ |
| Rewrite | ✗ | ✓ |
| Story Bible | ✗ | ✓ |
| First Draft | ✗ | ✓ |
✓ Grammarly Pros
- Works everywhere
- Clear suggestions
- Tone detection
- Plagiarism checker
✗ Grammarly Cons
- Premium is pricey
- Can over-correct
- Privacy concerns
✓ Sudowrite Pros
- Purpose-built for creative fiction writing
- Describe and Show-Not-Tell features improve prose
- Story Bible keeps character consistency
- Brainstorm feature generates plot ideas
✗ Sudowrite Cons
- Not suitable for non-fiction or business writing
- No free tier available
- AI suggestions can feel formulaic for experienced writers
The Verdict
Grammarly is built for writers and students, with a focus on grammar and spelling. Sudowrite targets novelists and screenwriters and leads with story-engine and describe.
On pricing, Grammarly is the clear winner for budget-conscious users — starting at $12/mo compared to $19/mo for Sudowrite. That $7/mo difference adds up quickly for growing teams.
Grammarly has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Sudowrite requires a paid subscription from day one.
Feature-wise, Sudowrite offers broader built-in capabilities (7 features vs 6), while Grammarly takes a more focused approach — which can mean a simpler, faster onboarding experience.
Bottom line: Grammarly has a slight overall edge — but if purpose-built for creative fiction writing matters most to you, Sudowrite may still be the right call.
