Bench test · AI Writing
Grammarly vs LanguageTool
Grammarly beats LanguageTool 9.0 to 7.8 on our four-agent test panel, winning 4 of 4 agents head to head. Grammarly: free tier; paid from $12/mo. LanguageTool: free tier; paid from $5/mo. Facts last verified October 7, 2026.
| Grammarly | LanguageTool | |
|---|---|---|
| consensus | score9.0/10 | score7.8/10 |
| agents won | 4 / 4 ▲ | 0 / 4 |
| from | $12/mo | $5/mo ▲ |
| free tier | yes | yes |
| category | AI Writing | AI Writing |
Agent panel — head to head
| Anthropic | 8.2 ▲ | 7.6 |
| OpenAI | 8.8 ▲ | 7.6 |
| Gemini | 9.4 ▲ | 8.3 |
| Grok | 9.5 ▲ | 7.8 |
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
$12/mo · free tier
Try Grammarly ▸$5/mo · free tier
Try LanguageTool ▸Verdict
Grammarly takes it — 9 to 7.8.
The panel gave Grammarly the edge on 4 of 4 agents.