Naming Guide

The radio test for business names

The radio test is the oldest naming check there is, and the one most founders skip. Say your business name out loud as if you were on a podcast, a phone call, or a drive-time ad. If a listener cannot turn that sound back into a search, the name failed. Here is how to run it properly, and which letter patterns and endings break it.

Updated 2026-09-14 GL By Geoff Langenderfer

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Why it is called the radio test

Before anyone types your name, someone says it. A friend recommends you, a podcast host reads a sponsor, a customer calls your office. In every one of those moments the name travels as sound only.

The test is simply this: treat the spoken name as the only thing your customer receives, and ask whether it is enough to find you again. Radio is just the setting where the stakes are most obvious, because there is no page, no logo, and no chance to spell it.

Which patterns fail the test

Failures cluster around a small set of patterns. If your name contains one, assume it will be transcribed wrong at least once:

“ph” against “f”, and “gh” that is sometimes silent (“night”), sometimes an “f” (“laugh”), and sometimes a hard “g” (“ghost”).
“c” doing two jobs — hard in “cat”, soft in “city” — so listeners do not know whether to reach for “c” or “s”.
Leading “kn”, “wr”, and “ps”, where the first letter is silent and gets dropped.
Borrowed spellings such as “y” for the vowel in “my”, and “qu” for a plain “k” sound.
Hyphens and numerals, because “dash” and “two” have to survive the trip back to a keyboard.
An ending that is not “.com”, because the listener who assumes “.com” reaches whoever owns it, and “dot io” has to be said out loud every time.

The ending is part of the test

The test is not finished when the listener can spell the label. They still have to reach the right address, and the ending is the one part of it nobody can work out for themselves. Hear “northwind” and you supply “.com” without being told — browsers autocomplete it and decades of habit fill it in. Hear “northwind dot io” and you have two more letters to remember, spell, and type, against the pull of the ending you expect.

That is why the ending is scored in its own right. A “.com” costs nothing to say; “.org” and “.net” are understood but still have to be said; “.io” and “.ai” are ordinary to a startup audience and invisible to everyone else; and “.co” is one character from the ending most people type. Whatever you choose, the rule matches the label: say it every time, and own the address a listener reaches when they guess.

How to run a radio test in five minutes

The test is cheap, but it only works if you refuse to help the listener. No spelling, no “like the animal”, no showing the logo.

1 Record yourself saying the name once, the way a stranger would say it.
2 Play it to someone who has never heard the name, and ask them to write it down.
3 Ask a second question: “what would you type into Google to find this company?” Compare the two answers, and note whether they added the ending at all.
4 Repeat with five people. Every “is that with a…?” is a name that will be misspelled in a support ticket, a review, or a sales email.

What the radio test does not cover

Passing the radio test does not mean the name is safe to use. It says nothing about whether the trademark is free, whether the domain is available, whether the name means something unfortunate in another market, or whether it is memorable after a week.

Treat it as a necessary first filter rather than approval. A name that fails the radio test will leak traffic forever, which is why it is worth checking before you fall in love with it.

Worked example: a name designed to fail

“Knight” is a real English word, which makes it worse, not better: every listener already has a spelling ready, and half of them have the wrong one.

knight

DTRI 36 /100

Risky Weakest link: Radio Test

The “k” never reaches the ear. Say the name once to a stranger and most will write “night” — the analyzer reports that respelling and flags it as a real, common word.
The “gh” is silent too. Strip that run instead of the “k” and you land on “knit”, the other respelling the tool reports — also a real word.
Nothing else sounds like “knight”, and that is exactly the problem: everything the ear simplifies it to is a word somebody else owns, so the audience who misses the spelling silently lands on “night”.

See the full breakdown for knight.com

Frequently asked questions

What is the radio test for business names?

It asks whether someone who only hears your name once can find you again. You say the name out loud, without spelling it or pointing at it, and check whether the listener can write it down and search for it correctly.

How do I run a radio test on my own name?

Record yourself saying the name once, play it to people who have never seen it, and ask them to write it down and then type what they would search. Count both the misspellings and the hesitations.

Which letters usually fail the radio test?

The common offenders are “ph” against “f”, silent leading letters like the “k” in “knight”, “gh” in all its pronunciations, “c” that can be hard or soft, and any name carrying a hyphen or a digit.

Is the radio test the same as a trademark search?

No. The radio test is about whether your customers can find you. A trademark search is about whether you are legally clear to use the name. You need both, and passing one says nothing about the other.

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