I Built ColdCopy in 3 Days to Stop Writing Terrible Cold Emails

Hey Dev.to! 👋

Just finished building ColdCopy because I was tired of spending 20+ minutes writing cold emails that still sounded terrible.

What it does: Fill out a form with your details + recipient info, pick your tone, and get a personalized cold email in 30 seconds.

Tech stack: Next.js 14, TypeScript, Tailwind CSS, OpenAI API

Why I built it: Cold emails are necessary but painful. You either spend forever crafting each one or send generic templates that get ignored.

Built it in 3 days focusing on:

  • Clean, minimal UI
  • Actually personalized output (not just mail merge)
  • Multiple tones and message types
  • Rate limiting for MVP testing

Currently free to try: https://coldcopy.xyz

The hardest part was prompt engineering – getting AI to generate emails that sound human rather than robotic corporate speak.

Looking for feedback from fellow developers! Does this solve a real problem or am I overthinking cold emails?

What’s your biggest struggle with outreach/cold emails?

buildinpublic #nextjs #ai

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