Here's a test I run on my own clients constantly, and now I'm handing it to you: take your last ten social captions, customer emails, or website blurbs, strip off your logo and your name, and hand them to a stranger. Ask them to guess who wrote it. If they can't get anywhere close, you don't have a brand voice. You have words that happen to be near your logo.
Most businesses fail this test, and it's not because they lack good writers. It's because "sounding professional" and "sounding like anyone in particular" are two completely different goals, and almost everyone optimizes for the first one by default.
The fast food brand that decided to be a person, on purpose
Wendy's is the example I bring up more than any other, because it's such a clean before-and-after. Around 2017, Wendy's had a fairly typical, play-it-safe corporate Twitter account — the kind that requires three layers of approval before a single tweet goes out and reads, as a result, like nobody in particular wrote it. The brand made a deliberate decision to strip out that approval bureaucracy and let its social team actually have a voice: witty, a little cheeky, unafraid to roast competitors and even its own followers.
The bio on that account reads, roughly, that they like their tweets the way they like their fries — hot, crispy, and better than anyone expects from a fast food joint. That's not a tagline dressed up as personality. It's an actual, specific point of view, applied consistently enough that Wendy's Twitter account became genuinely famous — millions of followers, viral moments, an entire self-invented "National Roast Day," and a brand equity lift that researchers have since tied directly back to that voice. Other fast food brands have tried to copy the sassy-tweets format. Almost none of them land the same way, because Wendy's isn't performing sass as a tactic — it's a specific, consistent personality, applied with real discipline over years, not a one-off stunt.
That's the part that actually matters for the test I opened with. If you screenshotted a Wendy's tweet with the handle blacked out, most people who follow food brands online could still guess it. That's what a real brand voice does. It makes anonymity impossible.
Why "professional" is often the enemy of recognizable
I think a lot of businesses quietly aim for "sounds professional" as the ceiling of their ambition, without realizing that professional and forgettable are dangerously close neighbors. Professional writing follows the rules. Recognizable writing has a personality that follows the rules on its own terms — specific word choices, a specific sense of humor or restraint, opinions stated plainly instead of hedged into mush.
This doesn't mean every brand needs to become Wendy's. A private aviation brand, for instance, needs an almost opposite voice — quiet, precise, understated — and that restraint, done consistently, is just as recognizable in its own category as Wendy's sass is in fast food. The goal was never "be loud." It was "be unmistakably, consistently yourself," whatever that specific self actually sounds like.
Why most brands fail this test without realizing it
The most common failure mode I see isn't a bad voice. It's an inconsistent one — different writers, different platforms, different moods on different days, with no shared reference point holding it together. One caption is playful. The next is corporate. A customer email sounds like a completely different company than the Instagram bio. Individually, none of it is bad writing. Together, it means there's no actual voice for a stranger to recognize, because there was never one voice to begin with — just several people, writing in their own natural style, with nothing tying it together on purpose.
How to actually build a voice that passes the test
You don't need a professional copywriter's manual for this, though it helps to write a few things down so the voice survives beyond whoever happens to be writing that day:
Name three things your brand would say, and three things it never would. Wendy's would roast a competitor's chicken sandwich. It would not apologize in a stiff, corporate press-release tone. Both of those decisions are the voice, as much as any specific word choice.
Pick a small number of words you'd actually use, and a few you'd ban. Not a full style guide necessarily — just enough that two different people writing for your brand would land in a similar place without needing to ask each other first.
Run the blackout test regularly, not once. Voices drift, especially as teams grow or more people start writing for the brand. What passed the test a year ago might not pass it today, quietly, the same way any kind of brand drift creeps in — a little bit at a time, from nobody actively deciding to change anything.
The version of this test I'd actually run on you
Pull up your last five customer-facing messages right now — captions, emails, whatever's closest at hand. Read them back to back, with the name covered. If you can't confidently say "yes, that's unmistakably us" by the third one, that's not a tone problem you fix with better adjectives. It's a decision that hasn't been made yet — the same decision Wendy's made deliberately in 2017, when it decided being professional was worth far less than being unmistakably, consistently itself.
Not sure your brand would pass its own blackout test? The free Brand Bloom Audit covers exactly this. Take the audit →