Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
Luma Dream Machine
Pros
+GDPR compliant with EEA/UK data rights (access, correction, deletion)
+High cinematic video quality from both text and image prompts
+Third-party model access alongside native Luma models
+Team and Enterprise plans available for larger organisations
Cons
−No free tier — entry starts at £24/mo (annual billing)
−Uses user content to train AI models
−SOC2 not confirmed from official sources
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 scores 8.1/10 to Luma Dream Machine's 7.6/10. Grammarly pulls ahead with SOC 2 certification and ISO 27001 certification. Luma Dream Machine counters with GDPR compliance. Pick Grammarly if SOC 2 certification matters; pick Luma Dream Machine if GDPR compliance matters.