TL;DR: Grammarly excels at grammar, spelling, and tone consistency. Claude provides deeper editing, rewriting, and content improvement. Use Grammarly for final polish; Claude for substantive editing.
Comparison
| Feature | Claude | Grammarly |
|---|---|---|
| Grammar Checking | Good | Excellent |
| Rewriting | Excellent | Basic |
| Tone Adjustment | Excellent | Very good |
| Real-time | No | Yes (browser extension) |
Winner
Best for Editing: Claude
Best for Proofreading: Grammarly

