Comparison · Updated April 2026
Grammarly vs Microsoft Copilot
An in-depth comparison of Grammarly and Microsoft Copilot across pricing, features, strengths, and ideal use cases — so you can pick the right tool for your workflow.
Quick verdict
Choose Grammarly if you need anyone who writes professionally. Choose Microsoft Copilot if you prioritize microsoft 365 power users and enterprise teams. Grammarly scores higher in user reviews (4.6 vs 4.2). Both offer free tiers — try each before committing.
Grammarly
AI writing assistant for grammar, style, and tone
Free · Premium $12/mo · Business $15/member/mo
Full review →Microsoft Copilot
AI assistant across Microsoft 365
Free · Pro $20/mo · M365 $30/user/mo
Full review →What is Grammarly?
Grammarly is the most widely deployed AI writing assistant, used by over 30 million people daily across browsers, desktop apps, and mobile keyboards. It operates everywhere you write, including email clients, Google Docs, Slack, social media, and CMS platforms, checking grammar, spelling, punctuation, clarity, tone, and style in real time. The free tier handles basic grammar and spelling. Premium ($12/mo) adds advanced suggestions for clarity, engagement, and delivery, plus a plagiarism detector that checks against 16 billion web pages. GrammarlyGO, the generative AI feature, enables full text generation, rewriting, brainstorming, and reply suggestions with controls for tone, formality, and length. For teams, Grammarly Business ($15/member/mo) adds a style guide, brand tones, analytics dashboard, and admin controls. Its strength is ubiquity: it works in the tools you already use without requiring context switching. It is the safest recommendation for anyone who writes professionally in English and wants polished, error-free output. The tool is best suited for anyone who writes professionally. It offers a free tier alongside paid plans (Free · Premium $12/mo · Business $15/member/mo), making it accessible for individuals and teams alike.
What is Microsoft Copilot?
Microsoft Copilot embeds AI directly into the applications where knowledge workers spend their day. In Word, it drafts documents, rewrites sections, and summarizes content. In Excel, it analyzes data, creates formulas, and generates charts from natural language. In PowerPoint, it builds entire presentations from a prompt or document. In Outlook, it summarizes email threads, drafts replies, and surfaces action items. In Teams, it transcribes meetings, generates summaries, and answers questions about discussions you missed. Rather than switching to a separate AI tool, Copilot works alongside you in familiar Microsoft interfaces. The free tier offers basic Copilot chat powered by GPT-4. Copilot Pro ($20/mo) adds priority access to the latest models and AI features in Office apps. Microsoft 365 Copilot ($30/user/mo) requires a business subscription and provides the full enterprise experience with Microsoft Graph integration, meaning the AI understands your organizational context, documents, emails, and calendar. It is the clear choice for organizations already standardized on the Microsoft stack. The tool is best suited for microsoft 365 power users and enterprise teams. It offers a free tier alongside paid plans (Free · Pro $20/mo · M365 $30/user/mo), making it accessible for individuals and teams alike.
Key differences at a glance
Pricing: Grammarly is priced at Free · Premium $12/mo · Business $15/member/mo, while Microsoft Copilot costs Free · Pro $20/mo · M365 $30/user/mo.
User ratings: Grammarly leads with a 4.6/5 rating from 4,500 reviews, compared to Microsoft Copilot's 4.2/5 from 2,100 reviews.
Best for: Grammarly is optimized for anyone who writes professionally, while Microsoft Copilot excels at microsoft 365 power users and enterprise teams.
Category overlap: Both tools compete in the writing, productivity categories.
Feature-by-feature comparison
| Feature | Grammarly | Microsoft Copilot |
|---|---|---|
| Pricing model | Freemium | Freemium |
| Starting price | Free · Premium $12/mo · Business $15/member/mo | Free · Pro $20/mo · M365 $30/user/mo |
| User rating | ||
| Best for | Anyone who writes professionally | Microsoft 365 power users and enterprise teams |
| Categories | writingproductivity | writingproductivity |
| Free tier available | ✓ Yes | ✓ Yes |
| Code generation | — No | ✓ Yes |
| File upload & analysis | — No | ✓ Yes |
| Mobile app | ✓ Yes | ✓ Yes |
| Team / collaboration plan | ✓ Yes | ✓ Yes |
| Custom bots / agents | ✓ Yes | — No |
| Multi-language support | — No | ✓ Yes |
| Grammar & spelling | ✓ Yes | — No |
| Tone detection | ✓ Yes | — No |
| Style suggestions | ✓ Yes | — No |
| Generative AI | ✓ Yes | — No |
| Plagiarism detection | ✓ Yes | — No |
| Word drafting | — No | ✓ Yes |
| Excel analysis | — No | ✓ Yes |
| PowerPoint generation | — No | ✓ Yes |
| Outlook management | — No | ✓ Yes |
| Microsoft Graph | — No | ✓ Yes |
| GPT-4 powered | — No | ✓ Yes |
Pros and cons
Grammarly
Strengths
- Works everywhere
- Best grammar correction
- Tone detection
- Massive trust
Limitations
- Premium required for advanced
- Gen AI less capable
- Can be prescriptive
Microsoft Copilot
Strengths
- Deep M365 integration
- Uses organizational context
- Enterprise security
- Works where you already work
Limitations
- Expensive for M365 tier
- Quality varies across apps
- Requires M365 subscription
Pricing comparison
Grammarly uses a freemium pricing model: Free · Premium $12/mo · Business $15/member/mo. The free tier is a good way to evaluate the tool before upgrading.
Microsoft Copilot uses a freemium pricing model: Free · Pro $20/mo · M365 $30/user/mo. The free tier is a good way to evaluate the tool before upgrading.
For cost-sensitive teams, compare actual API or per-seat costs using our AI Cost Calculator.
Which tool should you choose?
Choose Grammarly if you...
- → Need anyone who writes professionally
- → Value works everywhere
- → Value best grammar correction
- → Want to start free before committing
Choose Microsoft Copilot if you...
- → Need microsoft 365 power users and enterprise teams
- → Value deep m365 integration
- → Value uses organizational context
- → Want to start free before committing
Not sure which fits your workflow? Take our AI Tool Finder Quiz for a personalized recommendation based on your role, budget, and technical level.
Final verdict: Grammarly vs Microsoft Copilot
Both Grammarly and Microsoft Copilot are strong tools in the writing space, but they serve different needs. Grammarly stands out for works everywhere, making it ideal for anyone who writes professionally. Microsoft Copilot differentiates with deep m365 integration, which benefits users focused on microsoft 365 power users and enterprise teams.
With a 0.4-point rating advantage and 4,500 reviews, Grammarly has the edge in user satisfaction. The best approach is to try Grammarly's free tier and Microsoft Copilot's free tier to see which fits your specific workflow.
Frequently asked questions
Is Grammarly better than Microsoft Copilot?
It depends on your use case. Grammarly is best for anyone who writes professionally. Microsoft Copilot excels at microsoft 365 power users and enterprise teams. Based on user ratings, Grammarly scores slightly higher at 4.6/5.
How much does Grammarly cost compared to Microsoft Copilot?
Grammarly pricing: Free · Premium $12/mo · Business $15/member/mo. Microsoft Copilot pricing: Free · Pro $20/mo · M365 $30/user/mo. Both offer free tiers, so you can try each before committing.
Can I use Grammarly and Microsoft Copilot together?
Yes, many professionals use both tools for different tasks. You might use Grammarly for anyone who writes professionally and Microsoft Copilot for microsoft 365 power users and enterprise teams. Using complementary tools often produces the best results.
What are the best alternatives to Grammarly and Microsoft Copilot?
Top alternatives include Claude, ChatGPT, Cursor. Each offers different strengths — browse our alternatives pages for Grammarly and Microsoft Copilot for detailed breakdowns.
Which tool is easier to learn — Grammarly or Microsoft Copilot?
Grammarly has a moderate learning curve. Microsoft Copilot has a moderate learning curve. Both tools offer documentation and tutorials to help new users get started quickly.
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