Bench test · AI Writing
Grammarly vs LanguageTool
Same rack, same rubric, four independent agents. Here's how they measure up — and which we'd pick.
| Grammarly | LanguageTool | |
|---|---|---|
| consensus | score8.9/10 | score8.5/10 |
| agents won | 3 / 4 ▲ | 0 / 4 |
| from | Custom | Custom |
| free tier | no | no |
| category | AI Writing | AI Writing |
Agent panel — head to head
| Anthropic | 8.2 ▲ | 8.1 |
| OpenAI | 8.5 | 8.5 |
| Gemini | 9.3 ▲ | 9.0 |
| Grok | 9.5 ▲ | 8.3 |
Grammarly
- ✓Catches errors missed by other tools
- ✓Improves writing clarity and professionalism
- ✓Works across multiple platforms seamlessly
- —Premium features require paid subscription
- —Can be overly cautious with style suggestions
- —Occasional false positives in corrections
Grammar and spelling correctionTone detection and adjustmentClarity and readability suggestionsPlagiarism detectionAudience-specific writing guidanceBrowser and app integration
LanguageTool
- ✓Free version available with robust features
- ✓Excellent multilingual support
- ✓Works across multiple platforms and applications
- —Premium features required for advanced capabilities
- —Occasional false positives in style suggestions
- —Less advanced than some specialized competitors
Supports 30+ languages and dialectsReal-time grammar and spell checkingStyle and tone suggestionsPlagiarism detection (premium)Browser extensions and API integrationContext-aware corrections
Custom · no free tier
Try Grammarly ▸Custom · no free tier
Try LanguageTool ▸Verdict
Grammarly takes it — 8.9 to 8.5.
The panel gave Grammarly the edge on 3 of 4 agents.