What matters in a grammar checker
- Accuracy — catches real errors, not false alarms.
- Clarity suggestions — beyond spelling.
- Privacy — local vs cloud.
Tools compared
| Tool | Strength | Privacy |
|---|---|---|
| Grammarly | Polish, tone | Cloud |
| ProWritingAid | Deep reports | Cloud |
| LanguageTool | Multilingual, self-host | Both |
| Glint AI Grammar Checker | Local, free | No upload |
Free vs paid
Free tools catch the mistakes that matter for most daily writing. Paid adds tone and style reports. See our Grammarly alternative breakdown.