VS
Head-to-Head Comparison
Microsoft Copilot vs Grammarly
An honest, side-by-side breakdown of pricing, features, and security — so you can pick the right tool.
Feature comparison
| Feature | Microsoft Copilot | Grammarly |
|---|---|---|
| CompareMyAI score | 7.8 / 10 | 8.1 / 10 |
| Free tier | ||
| API access | ||
| Open source | ||
| Enterprise ready | ||
| GDPR compliant | ||
| SOC 2 certified | ||
| ISO 27001 | ||
| MFA supported | ||
| Trains on your data | Yes |
Pricing
FreeFree
Microsoft 365 Personal£6/mo
Microsoft 365 Copilot£24/mo
EnterpriseContact us
G
FreeFree
Pro£10/mo
EnterpriseContact us
Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
Microsoft Copilot
Pros
- +Built into Microsoft 365
- +Strong enterprise security and compliance
- +SOC2 and GDPR certified
- +No separate subscription if you have M365
Cons
- −Limited standalone value outside Microsoft ecosystem
- −Less capable than ChatGPT or Claude for general tasks
- −Requires M365 licence
Grammarly
Pros
- +SOC 2 Type II and ISO 27001 certified — strongest compliance in the writing category
- +Works across browser, desktop, Word, Google Docs, and email with one install
- +Pro tier confirmed at £10/mo in GBP — transparent UK pricing
- +Explicit opt-out from AI model training available in account settings
Cons
- −Trains on user writing by default — opt-out required
- −GDPR compliance not explicitly confirmed on accessed official pages
- −Free AI prompt limit (100/mo) may feel restrictive for daily users
Our take— Grammarly wins
Based on our comparison of published pricing, features, and compliance data, Grammarly pulls ahead with API access. Microsoft Copilot counters with GDPR compliance. Grammarly scores 8.1/10 to Microsoft Copilot's 7.8/10. Pick Grammarly if you need API access; pick Microsoft Copilot if GDPR compliance matters.