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Grammarly vs Sudowrite
Grammarly scores higher overall (8.6 vs 7.2), but the right pick depends on what you need.
Choose Grammarly if…
Anyone who wants polished, correct writing in every app without copying text into a separate tool
8.6/10★★★★★Full review →Choose Sudowrite if…
Novelists and screenwriters who want an AI co-writer that understands story
7.2/10★★★★★Full review →Side by side
| Grammarly | Sudowrite | |
|---|---|---|
| Overall score | 8.6/10 | 7.2/10 |
| Rank in category | #1 of 10 | #7 of 10 |
| Price | Freemium · from $12/month | Free trial · from $10/month |
| Free version | Basic spelling, grammar and tone checks plus 100 AI prompts a month | Free trial with no credit card |
| Platforms | Web, iOS, Android, Desktop app, Chrome extension, Microsoft Word, Google Docs | Web |
| Made by | Superhuman (formerly Grammarly, Inc.) | Sudowrite |
| Writing quality | 8.5 | 8.5 |
| Ease of use | 9 | 7.5 |
| Features | 8.5 | 7 |
| Value for money | 7.5 | 7 |
| Platforms | 10 | 3.5 |
Grammarly: what the AI does
- Real-time grammar, clarity and tone suggestions
- Full-sentence and paragraph rewrites
- Generative AI prompts for drafting and replies
- Plagiarism and AI-text detection
- Agents such as Citation Finder, AI Grader and Reader Reactions
- Superhuman Go assistant in the browser extension
- Works almost everywhere you type: browser, desktop, mobile keyboard, Word and Docs
- The most dependable grammar and clarity checks for English
- Free plan is genuinely useful
- Pro bundles plagiarism and AI-text detection
- Monthly billing ($30) is expensive compared with the annual price
- Its AI drafting is weaker than dedicated chatbots for long-form writing
- The extension reads everything you type, which raises privacy questions for some
Sudowrite: what the AI does
- Story Bible from outline to draft
- Write autocomplete in your style
- Describe, Expand and Rewrite tools
- Feedback and developmental edits
- Canvas and Brainstorm for planning
- Muse fiction model plus 30+ other models
- Purpose-built for fiction, with tools for description, pacing and continuity
- Story Bible keeps characters and plot consistent
- Matches your prose style
- Easy cancellation and pausing
- Web only, with few integrations
- Credit-based plans can run out on long projects
- Generated prose often needs heavy editing