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It's a split decision.
Choose Grammarly if your main job is polishing text: its free plan covers proofreading, tone, and 100 AI prompts monthly, while Pro is €12/month for full-sentence rewrites and 2,000 prompts per member. Choose Microsoft Copilot for broader questions, web-grounded answers, summaries, content, and image creation. Copilot has a free tier, but paid options vary: Copilot Pro is $20/month, while Microsoft 365 Premium is $16.67/month on annual billing. These prices use different currencies and bundles, so compare what you need.
01Side by side
| Grammarly | Microsoft Copilot | |
|---|---|---|
| Starting price | Pro: €12/month | Copilot Pro: $20/month; Premium: $16.67/month annually |
| Free plan | Yes; 100 AI prompts monthly | Yes; signed-in account; exact message caps unpublished |
| Best for | Proofreading and improving existing writing | Answers, research, content, images, and everyday tasks |
| Core strength | Grammar, tone, clarity, and sentence rewrites | Web-grounded answers and broader content creation |
| Learning curve | Not published | Not published |
| Integrations and data | Works in Zendesk and other text boxes | Web, desktop, mobile; separate work and personal accounts |
| Team/seat costs | Pro: €12/month; Enterprise: custom pricing | Business: $18/user/month promo through Dec. 31, 2026; base license required |
| Support | Enterprise includes dedicated support | Support details not published |
Grammarly Choose Grammarly if
- Your priority is proofreading, tone, and clarity fixes.
- You want full-sentence rewrites and 2,000 monthly AI prompts.
- You need writing assistance in Zendesk and other text boxes.
Microsoft Copilot Choose Microsoft Copilot if
- You want web search, answers, summaries, and image generation.
- Your work already uses eligible Microsoft 365 licenses.
- Your team needs Copilot Business or Enterprise access.
02Pricing compared
Grammarly has a free plan with proofreading, tone feedback, and 100 AI prompts per month. Pro costs €12 per month and raises the allowance to 2,000 prompts per member, with full-sentence rewrites and other features. Enterprise pricing is custom.
Microsoft Copilot also has a free tier, but exact message caps are not published; the free plan lists 15 Designer image boosts per day. Copilot Pro is $20 per user per month. Microsoft 365 Premium costs $19.99 monthly or $16.67 per month with annual billing. Copilot for business and enterprise requires a qualifying Microsoft 365 license, so its listed price is not the whole cost. These products use different currencies and bundles: compare the feature and license you need rather than treating the prices as directly equivalent.
03Features and depth
Grammarly is the more focused writing editor. Its free plan covers proofreading, tone feedback, and 100 monthly AI prompts. Pro adds full-sentence rewrites, tone adjustment, plagiarism and AI-text detection, plus one style guide, one brand tone, and two user groups. The homepage also lists paragraph rewrites and a Humanizer agent. That is useful when the task is improving text you have already drafted.
Copilot covers a broader set of tasks: AI chat, web search with grounded answers, content drafting, image generation, and summaries. Its work features include finding files and insights, and separate work and personal accounts keep chats, files, and protections tied to the relevant account. The trade-off is less clarity around usage: Copilot’s exact message caps are not published for the free, business, or enterprise plans. Grammarly publishes prompt allowances for Free and Pro, making those limits easier to compare.
04Ease of use and learning curve
Grammarly is built to work where you type, including apps such as Zendesk and other text boxes. That keeps its core job—checking and revising writing—close to the draft. Free access requires less commitment; Pro adds more prompts and editing tools if you need them.
Copilot is available on web, desktop, and mobile, and the free tier requires a signed-in Microsoft account. Its chat format suits questions, research, summaries, and content creation, rather than only proofreading. For work use, Microsoft’s paid business plans require an eligible base license, which adds a setup and cost consideration. Neither product’s published information gives a measured learning curve, so the practical difference is the workflow you want.
Questions people ask
Is Grammarly considered AI?
Yes. Grammarly describes itself as an AI-powered writing assistant. Its features include proofreading, tone and clarity suggestions, sentence rewrites, and an AI Detector agent. The free plan includes 100 AI prompts per month; Pro lists 2,000 prompts per member per month.
Is Microsoft Copilot good to use?
It depends on the task. The published review rates Copilot well for everyday answers and Microsoft workflows, while noting that paid access and limits can be unclear. It can answer questions, search the web, summarize information, draft content, and generate images; some capabilities have usage limits.
What is the Microsoft equivalent of Grammarly?
Microsoft Copilot can help draft content, but the published feature list does not describe it as a dedicated grammar and proofreading tool. Grammarly specifically checks grammar, tone, and clarity in text boxes and offers sentence rewrites. Choose based on whether you need broad AI help or focused editing.
What is more accurate, Grammarly or QuillBot?
The published information does not include a head-to-head accuracy comparison of Grammarly and QuillBot, so we can’t say which is more accurate. Grammarly’s listed role is proofreading and writing assistance; to compare accuracy, look for the same text evaluated under the same conditions.