How long should a cold email be?

A cold email should be roughly 50 to 125 words, about two short paragraphs, and closer to 100 or fewer when you write to executives. Gong's data shows reply rates dropping sharply above 100 words, and Boomerang's analysis of its customers' everyday email found the best response rates between 50 and 125. Going below 50 words can cost you replies too.

What the data says

Three sources, each measuring something different:

• Gong says reply rates drop sharply once emails exceed 100 words, and the highest-performing emails land between 50 and 100 words. That article is about emails to executives, and it gives no sample or window for the length finding.
• Boomerang's February 2016 post draws on its customers' email, not cold outreach (over 40 million emails had a reminder set in the prior year). It found the sweet spot is 50 to 125 words, with response rates above 50% across that range. Rates declined slowly from 50% at 125 words to about 44% at 500 words, and fell faster below 50 words.
• Sales.co's cold email statistics page says ultra short emails and medium-length emails performed almost the same, 8.78% and 8.74% positive rate, and long emails dropped to 6.42%. That is the share of replies that were positive, from its 2026 benchmark of 2M+ emails (the copy analysis covers 1.7M+ messages). The page does not define the word counts behind "ultra short", "medium" or "long", so use it for direction only.

Boomerang gives a feel for the sizes: a 50-word email looks like two short paragraphs, and a 125-word email is roughly two normal paragraphs plus a short one.

How to do it

1. Write the email, then cut it. Aim for 50 to 100 words. Paste it into any word counter to check.
2. Open with one specific line about them or their situation. Skip your company history.
3. Say what you offer or what problem you see in one or two sentences.
4. Ask for one thing. Gong suggests an offer of value rather than a meeting request.
5. Read it on your phone. If you have to scroll, trim again.
6. Test two lengths on the same kind of list and compare human replies. At Sales.co's average human response rate of 0.70%, 500 emails produce about 3 or 4 replies, so you need a large test to see a small gap.

Examples

• Gong's sample call to action for an education executive is 22 words: "We pulled together a brief benchmark showing how your university compares to peer institutions on student retention. Open to reviewing it together?"
• Gong's Problem Prompter framework fits a whole email in 100 words or fewer: a line on their priority, the problem that makes it harder, how companies usually handle it, an offer of a different view, and a low-pressure close.

Limits: when it backfires

• Short is not automatically better. Boomerang found response rates fell more steeply below 50 words, and a very short email can leave out the reason to reply.
• Length is a small lever. Sales.co's data says who you email moves reply rates most, then whether you reach the inbox, then the first message. Across 1,288,605 cold emails (October 2025 to August 2026), the average human response rate was 0.70%.
• The studies measure different things. Boomerang's emails were everyday email, Gong's were to executives, and Sales.co's are its own B2B campaigns. None is a controlled test of length on your audience.
• Cutting words does not excuse a vague offer or a bad list. A 60-word email to the wrong person still gets no reply.
• Compliance text counts too. CAN-SPAM requires a valid physical postal address and an opt-out, and it makes no exception for business-to-business email. Keep that out of your word budget by putting it in the signature.

Questions people ask

Is 100 words too long for a cold email? Gong's data puts the best performers at 50 to 100 words and sees reply rates drop sharply beyond 100, so 100 is a ceiling worth respecting for executives.

Do follow-ups need to be as short? None of the sources above measures follow-up length. Sales.co's analysis of 1.5M+ emails (December 2025) found that 69% of all replies come from the first message, so put your effort into email one.

Sources

• Gong, do execs really reply to cold email, read Oct 8, 2026
• Boomerang, 7 tips for getting more responses to your emails, read Oct 8, 2026
• Sales.co, cold email statistics, read Oct 8, 2026
• Sales.co, cold email response rates, read Oct 8, 2026
• Sales.co, cold email reality check, read Oct 8, 2026
• FTC, CAN-SPAM compliance guide, read Oct 8, 2026