Bench test · AI Writing
Compose.ai vs Grammarly
Grammarly beats Compose.ai 9.0 to 4.8 on our four-agent test panel, winning 4 of 4 agents head to head. Compose.ai: free tier; paid from $12/mo. Grammarly: free tier; paid from $12/mo. Facts last verified November 1, 2026.
| Compose.ai | Grammarly | |
|---|---|---|
| consensus | score4.8/10 | score9.0/10 |
| agents won | 0 / 4 | 4 / 4 ▲ |
| from | $12/mo | $12/mo |
| free tier | yes | yes |
| category | AI Writing | AI Writing |
Agent panel — head to head
| Anthropic | 6.2 | 8.2 ▲ |
| OpenAI | 5.8 | 8.9 ▲ |
| Gemini | 2.5 | 9.2 ▲ |
| Grok | 4.5 | 9.5 ▲ |
Compose.ai
- ✓Seamless integration with existing web tools
- ✓Saves time on drafting and composing messages
- ✓Accessible directly from your browser
- —Limited to Chrome browser only
- —May require subscription for full features
- —Quality depends on input context provided
AI-powered writing suggestions and autocompletionWorks across web applications and email platformsTone and style customization optionsChrome extension integrationTemplate library for common writing tasksReal-time writing assistance
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
$12/mo · free tier
Try Compose.ai ▸$12/mo · free tier
Try Grammarly ▸Verdict
Grammarly takes it — 9 to 4.8.
The panel gave Grammarly the edge on 4 of 4 agents.