Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
GitHub Copilot
Pros
+Deeply integrated into VS Code and major IDEs
+Excellent at code completion and boilerplate
+Strong enterprise security
+Trained on vast public code
Cons
−Requires GitHub subscription
−Can suggest insecure code patterns
−Less useful for architecture decisions
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— GitHub Copilot wins
Based on our comparison of published pricing, features, and compliance data, GitHub Copilot pulls ahead with GDPR compliance and a no-training-on-your-data policy. Grammarly stays close but doesn't lead on any single attribute here. GitHub Copilot scores 8.5/10 to Grammarly's 8.1/10. Pick GitHub Copilot if GDPR compliance matters; Grammarly is the pick if it doesn't.