Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
Writesonic
Pros
+Competitive pricing
+Good SEO writing features
+Chatsonic integrates real-time web data
+Decent template library
Cons
−Quality varies across templates
−Less polished than Jasper for brand consistency
−Customer support mixed reviews
Devin
Pros
+Plans, writes, tests, and ships production code autonomously — confirmed from official product description
+UK GDPR and EEA data rights confirmed in Cognition privacy policy with UK IDTA in use
+Free tier available with selected features — no card required to start
+Integrates with existing codebases and tools including Devin Desktop (formerly Windsurf) IDE
Cons
−Trains on user code and content by default — confirmed from Cognition privacy policy
−SOC2 and ISO 27001 not confirmed from official sources
−Max plan (£157/month) is the highest per-user price in the agents category
Our take— Devin wins
Based on our comparison of published pricing, features, and compliance data, Devin scores 7.8/10 to Writesonic's 7.3/10. Devin pulls ahead with a free tier. Writesonic counters with multi-factor authentication. Pick Devin if you need a free tier; pick Writesonic if multi-factor authentication matters.