Write an ultra-short three-sentence cold email
Delivers three complete cold email variants of exactly three sentences and at most 45 words each — one sentence for relevance, one for proven value, one for a frictionless ask. The format that respects busy readers most, engineered so no sentence hides behind another and vague claims have nowhere to live.
You are a minimalist cold email writer. Your specialty is the three-sentence email — the format that wins when it works because it respects the reader completely, and fails hardest when it doesn't because there's nowhere to hide. Three sentences means three jobs, one each: relevance (why you, why now), value (what outcome, with proof), and the ask (one frictionless question). No sentence gets two jobs. No job gets two sentences. Write ONE three-sentence cold email: - 45 words maximum across all three sentences. - Sentence 1: the reason this specific person is getting this email — a signal, a segment-specific problem, or a sharp observation. No greetings, no introductions. - Sentence 2: the outcome I deliver, with a number or named proof. This is the only sentence where my company exists. - Sentence 3: a question so easy to answer that typing the reply takes less effort than deleting the email. Interest-based, never calendar-based. - Banned: 'I'll keep this short' (show, don't announce), semicolon-stuffed compound sentences that cheat the count, greetings, sign-off filler, and any link. Give me three complete variants, each with a 1-3 word lowercase subject line, so I can test different sentence-one angles. Before you write anything, interview me. Ask me these questions ONE AT A TIME, waiting for my answer each time: 1. Who is the prospect, and what do you know about them or their segment? 2. What do you sell, and what's your sharpest one-number proof point? 3. What's the reason-why-now — a trigger, a signal, or a segment pain? 4. What would a perfect reply say? Once you have my answers, write the three variants. If my proof point in question 2 is soft, use the most concrete thing I have and flag that this format especially punishes vague claims.
How to use it
- 1
Copy the prompt into Claude, ChatGPT, or any LLM.
- 2
Bring your sharpest single number to question 2 — this format lives or dies on that one proof point.
- 3
Pick the variant whose first sentence is most specific to your prospect, not the one that sounds cleverest.
- 4
Test the three-sentence format against your standard length on the same list segment and let replies decide.
Best practices
This format shines on mobile-heavy audiences — executives triaging from a phone see the entire email without scrolling.
Sentence three's bar is 'easier to answer than to delete': yes/no questions and 'is this on your radar?' beat anything requiring thought.
Ultra-short works best with a strong signal or tight segment; with weak relevance, three sentences just means faster deletion.
Resist adding a fourth sentence in editing — if something's missing, the fix is sharper sentences, not more of them.
Example: what this looks like in practice
An SDR at an expense management platform targets CFOs at 200-500 person companies during budget season. Her proof point: a customer closed their books four days faster within two months. Variant two wins her test: 'Most CFOs at 300-person companies are still losing a week each month to expense reconciliation. We cut close time by four days at a similar firm inside two months. Is close speed on your radar for next year?' — 44 words, subject 'close week'. Against her usual 90-word email on a matched segment, the three-sentence version pulls a 4.9% reply rate versus 3.1%.
Best fit
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Yes, when relevance is strong — a three-sentence email to a well-chosen prospect signals confidence and respect for their time, and reads fully on a phone screen. They fail when the targeting is weak, because brevity removes the room to build a case. Short format, sharp segment, and one hard proof number is the combination that performs.
More cold email writing prompts
Get your cold email critiqued and scored like a skeptical prospect
Runs your cold email through a three-pass review: a brutal line-by-line read from a busy prospect's perspective, a five-dimension strategic score, and a rewrite that fixes the weakest dimensions. You learn why the email underperforms, not just that it does — the pattern transfers to every email you write after.
Write a complete cold email from scratch
Produces a complete, send-ready cold email of 60-100 words with the four-part spine that books meetings: reason, problem, proven outcome, soft ask. The five-question interview forces you to articulate the 'why now' most campaigns skip, and the prompt refuses to write until that angle is real.
Audit and rank your subject lines before you hit send
Puts every subject line candidate through a brutal pre-send audit: a 1-10 plausibility score, its biggest weakness named, spam-pattern flags, and a fixed rewrite. You get a ranked list with a clear verdict — two to test, the rest to kill — instead of sending on gut feel.