Personalisation that works, and personalisation that costs you trust

There is a piece of advice that has survived twenty years of sales training without anyone checking whether it still works: use their name. Put it in the subject line. Use it again in the opener. Use it a third time before the ask.

Here is Jason Cohen — founder of Smart Bear and WP Engine, and a person whose inbox is a reasonable proxy for the inbox of anyone you are trying to reach — describing what that actually does:

There's that thing where you're supposed to use the other person's name all the time. People do that on purpose, and that means I don't trust you. So to me it has the opposite effect.

Jason Cohen

That is worth sitting with, because it inverts the intent. The merge tag was supposed to signal I see you. To an experienced buyer it signals the opposite: only automation is that disciplined about repeating a name. No human writing to one person writes that way. The tell is not that the name is wrong. The tell is that it is deployed.

The distinction that actually matters

In the same conversation, Cohen describes the version that does land — a cold email containing a screenshot of the recipient's own website:

If you show me my own stuff, then it seems more personalized. Maybe I'll look at it, and it doesn't seem quite so cold of an email.

Jason Cohen

Both of those are "personalisation". They are not remotely the same move, and the difference is not stylistic. It is evidence of work.

• {{FirstName}} costs nothing. It is one column in a CSV. Because it costs nothing, it proves nothing — and a buyer who has received four hundred of these knows exactly what it cost.
• A specific, verifiable observation about the recipient's business costs somebody twenty minutes. It proves that a person — or something acting with a person's diligence — actually looked before they wrote.

Cold outreach is a trust transaction conducted entirely through inference. The recipient cannot check your claims, so they grade the signal of effort instead. Every element of your email is read as a proxy for how much you cared. Merge tags read as not at all.

What counts as showing someone their own stuff

The screenshot is one instance of a general rule: reference something that could only be true of this company, that you could only know by looking.

Strong signals — things that require someone to have read:

• What they actually sell, described in their own vocabulary rather than their category's. Every project-management tool says "project management"; the good ones describe a specific job.
• Something that changed recently, with the source. A new market they announced, a role they are hiring for, a partner they added, a page they rewrote.
• A named constraint you can infer from their setup — they sell to enterprise but have no security page, they have twelve integrations but not the one their segment needs.
• Who else is already selling to their buyer without competing with them. This is the most useful thing you can put in a first email, because it is immediately actionable and it is about them, not you.

Weak signals — things a list vendor supplies, which the recipient knows:

• First name, company name, job title, headcount, funding round, tech stack.
• "I saw you're in [industry] and thought I'd reach out."
• "Congrats on the round!" — the highest-volume opener in B2B, and therefore the one with the least information in it.

The test is simple and slightly uncomfortable: could you paste this sentence into an email to a different company and have it still make sense? If yes, it is not personalisation. It is a template with a variable in it, and it will be read as one.

What it looks like written down

The principle is easy to agree with and easy to lose in the drafting, so here is the whole email. Five short paragraphs, no merge tags, and every line doing one job.

Subject: your {the thing they announced}

{Name} — I read your {launch page / careers page / partner page} and it looks like {specific, verifiable observation about what they are pushing on right now}.

If that's right, the {N} companies below are already selling to the same buyer and don't compete with you. I've written up why each one fits, who to speak to, and a first-meeting note for the top one — attached, nothing to sign up for.

If it's useful I'll do the next ten. If not, no reply needed.

— {Sender}

Why each part is there:

• The subject line names their priority, not your product. It is the only line guaranteed to be read, and it is the cheapest place to prove you looked.
• The observation is verifiable and specific. Not "I see you're growing" — something a person could check and either confirm or correct. If your observation cannot be wrong, it is not evidence of anything.
• The value is attached, not offered. They are not being asked for thirty minutes so you can describe a thing; the thing is here. This matters more than it seems: a recipient who is not activated on this problem cannot justify a meeting at any level of interest, but they can open an attachment.
• The ask is smaller than the gift. "I'll do the next ten" is an offer to do more work, not a request for their time.
• The exit is explicit. No reply needed costs you nothing and removes the small social debt that makes people avoid the message entirely.

The structural point: everything expensive in that email is in the second paragraph and the attachment. That is the twenty minutes, and it is the only part a competitor sending four hundred merge-tagged emails cannot copy.

The objection, and the honest answer

The obvious problem: strong signals do not scale. Twenty minutes of reading per prospect is four prospects a morning. Merge tags exist because volume exists.

There are only three real answers to that.

One: accept lower volume. If your average contract is worth enough, forty researched emails beat four hundred merged ones — and at high enough deal sizes this is simply correct. The threshold practitioners tend to name for outbound being economic at all sits somewhere around $3,000–$5,000 of annual contract value. Below it, the maths gets hard.

Two: narrow the segment until the research generalises. If you only write to BigCommerce stores doing over $400k, a lot of the reading is shared across the list. You do the work once and the specifics stay specific. This is the quiet argument for niching: it is not only a positioning move, it is a research efficiency move.

Three: automate the reading, not the writing. This is the interesting one, and it is the distinction most "AI SDR" tools get backwards. They automate the writing — which produces four hundred fluent, personalised-looking emails that say nothing only a reader of that company could have written. The recipient's inference machine catches it immediately, because the tell was never grammar. It was evidence.

Automating the reading is the opposite: open the company's actual site, follow the pages that say what they sell and to whom, note what changed and when, record what you ruled out — and then let a human write the email from a page of real findings. The volume goes up. The evidence stays real.

What to do on Monday

1. Open your current sequence. Delete every merge tag that is not strictly necessary for the sentence to parse.
2. Take the first line of email one and apply the paste test. If it survives being moved to another company, it is doing no work — replace it with one verifiable observation.
3. Pick the three signals above that you can actually source for your segment and make them a required field on your list. If a row cannot be filled in, that row is not ready to email.
4. Measure reply rate, not open rate. Merge tags do fine on opens. They lose on the only metric that pays.

The uncomfortable summary is that good cold email has always been expensive, and most of the tooling built in the last decade has made it cheaper rather than better. The cost was never the writing. It was the looking.