Cold Email Prompt Builder

Cold email prompt builder

Cold email works when it feels written for one person, not blasted to a list. The formula is simple but easy to get wrong: a relevant opener, one sharp value point, and a single low-friction ask, all kept short enough to read on a phone. This builder turns your ICP and offer into an LLM prompt that produces exactly that, plus subject-line and opener variations to test.

How it works

You describe your ideal customer — their role, company type, and the pain they feel — then your value proposition, the single action you want them to take, and the tone. The builder assembles a prompt that instructs the model to write a cold email under 120 words with a curiosity-driven subject, a personalised opener slot, one value sentence, social proof if you supplied it, and one clear CTA. It asks for three subject-line variants and two opener variants so you have material to A/B test.

Tips and examples

• Earn the open with the subject. Short, specific, curiosity-led subjects beat clever ones. The prompt generates several to test.
• Personalise the first line, not the whole email. A single researched opener does most of the work; the prompt leaves a clear slot for it.
• One ask only. “Worth a 15-minute call Thursday?” converts better than “let me know your thoughts.” The prompt enforces a single CTA.
• Cut every adjective you can. Cold emails live or die on brevity — the prompt caps length and strips filler automatically.