Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
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
Canva AI (Magic Studio)
Pros
+SOC 2 Type II, ISO 27001, and GDPR compliant — strongest compliance in this category
+Free tier includes 200 Standard AI uses with no credit card required
+Integrates AI directly into 600,000+ templates — no context switching
+Opt-out from AI training available in privacy controls
Cons
−Uses user content to train AI models by default — opt-out required
−No developer API for AI feature integration
−Pro tier pricing is per-seat annually — less flexible for one-off use
Our take— Grammarly wins
Based on our comparison of published pricing, features, and compliance data, Grammarly pulls ahead with API access. Canva AI (Magic Studio) counters with GDPR compliance. Grammarly scores 8.1/10 to Canva AI (Magic Studio)'s 7.8/10. Pick Grammarly if you need API access; pick Canva AI (Magic Studio) if GDPR compliance matters.