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Tools · Comparison

Mails.ai vs Refraction AI vs v0

All three are code assistant tools. Here is what separates them.

Mails.aiRefraction AIv0
What it isSelf-serve AI email API + MCP for agents. Per-agent addresses, per-agent reputation, native prompt-injection scanning on every inbound.Refactor code, generate documentation, create unit tests and more. Simply paste a block of code, choose your language or framework, then hit "Generate" to…Vercel’s generator for React interfaces: describe or sketch a screen and get componentised code back.
CategoryCode AssistantCode AssistantCode Assistant
PricingFreemium · $15 - $149/moPaid · $8/moFreemium · Free · Premium $20/mo · Team $30/user/mo
How it billsFlat monthlyFlat monthlyPer seat
Free tierYesNoYes
RatingNot yet ratedNot yet ratedNot yet rated
Features——
  • React, Tailwind and shadcn/ui output
  • Image and Figma input
  • Iterative refinement by prompt
  • Component-level code you can paste
  • One-click deploy to Vercel
What works
  • Has a free tier, so it can be tried before paying
  • Publishes its price openly — $15 - $149/mo
  • Sits in Code Assistant, one of the better-covered categories here — easy to compare
  • Publishes its price openly — $8/mo
  • Sits in Code Assistant, one of the better-covered categories here — easy to compare
  • Output matches a stack many teams already use
  • Very fast for layout work
  • Good at turning a screenshot into markup
What does not
  • 97 other tools in this catalogue claim to do the same job
  • No free tier — it has to be paid for before it can be tried
  • 97 other tools in this catalogue claim to do the same job
  • 45 tools in the same category have a free tier
  • Limited to the React ecosystem
  • Not for application logic
  • Free tier is small
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