
Grammarly

Side-by-side comparison based on pricing, features, and community data.
Grammarly and Microsoft Copilot are both AI productivity tools. Grammarly is Freemium; Microsoft Copilot is Freemium. These tools solve different problems.
These tools solve different problems. Grammarly is a specialized writing quality tool for polishing existing prose across any platform—pick it if you write frequently in varied contexts and want real-time grammar, tone, and plagiarism checks. Copilot is a general-purpose AI assistant embedded in Microsoft's productivity suite—pick it if you live in Word, Excel, and Outlook and need help generating, analyzing, and composing from scratch. Grammarly excels at refinement; Copilot excels at creation within Microsoft ecosystems. For non-Microsoft users or standalone writing work, Grammarly wins. For Microsoft-dependent workflows needing broad AI assistance, Copilot wins.
Pick Grammarly if you compose across email, social media, and web platforms and want AI-powered corrections and tone adjustments wherever you write.
Pick Microsoft Copilot if you work primarily in Word, Excel, and Outlook and need a general AI assistant for content generation, analysis, and document understanding.
| Feature | Grammarly | Microsoft Copilot |
|---|---|---|
| Real-time grammar/spell checking | ✓ Native | — |
| Tone detection & adjustment | ✓ Advanced | Partial |
| Plagiarism detection | ✓ Premium | — |
| Microsoft Office integration | Partial (Word, Docs) | ✓ Deep (Word, Excel, Outlook, PowerPoint) |
| Cross-platform web access | ✓ 500+ integrations | Edge/Bing only |
| AI content generation | ✓ Grammarly Go (premium) | ✓ GPT-4 (Pro tier) |
| Mobile support | ✓ Full iOS/Android app | Web only |
| Message/usage limits on free tier | — | ✓ Limited |
Synthesized by AI from verified tool data · cached per pair


Basic grammar and spell checking
All features including plagiarism detection, tone detection, advanced suggestions
Team collaboration, brand style guides, team analytics
15 messages every 2 hours, limited to GPT-3.5
Unlimited messages, GPT-4 access, advanced reasoning