Most email tools tell you nothing until your open rate comes back low. kopi runs every generated email through an automated design critique — layout hierarchy, CTA contrast, mobile readability, and 12 other criteria — before you export anything.
Here's a real example from the public gallery at trykopi.ai/emails, a promotional email that scored 91/100:
Layout hierarchy: 94 — clear F-pattern, single focal point above fold
CTA contrast: 88 — button passes WCAG AA at 4.8:1, but fails AAA
Mobile readability: 91 — 16px body, single-column reflow confirmed
Whitespace balance: 90 — consistent 24px section padding throughout
The critique flagged one thing: the secondary CTA in the footer used the same visual weight as the primary. Small call, but the kind of thing you'd only catch after a designer reviewed it — or after your click-through data came back split between two buttons you didn't mean to compete.
The email itself was generated from a 2-sentence brief. The whole loop — prompt to scored HTML — ran in under 5 minutes.
If you're on Klaviyo, there's a direct export. It also runs as an MCP server if you want it wired into Claude Code or Cursor.
400+ emails scoring 80+ are public at trykopi.ai/emails if you want to browse scores before trying your own brief.
github.com/robertnowell/kopi
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