Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
Lindy
Pros
+Explicitly commits to never training models on user data
+SOC 2 and GDPR certified — strong compliance for UK businesses
+HIPAA compliant on Enterprise — suitable for health and finance
+MCP support for broad integrations
Cons
−No free tier — trial only via Slack invite
−Pro and Max tiers expensive for solo users
−Credit-based model makes cost hard to predict
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 ISO 27001 certification and a free tier. Lindy counters with GDPR compliance. Grammarly scores 8.1/10 to Lindy's 7.9/10. Pick Grammarly if ISO 27001 certification matters; pick Lindy if GDPR compliance matters.