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how to write in your brand voice

your brand voice isn't a mood board. it's a set of measurable writing habits. here's how to find them, document them, and keep ai from smoothing them into nothing.

ai

shashank  ·  with ai as his sidekick 28 min read · published may 04, 2026 · updated may 04, 2026

what brand voice is, really

brand voice is the set of patterns that makes your writing sound like you. even without a logo. it’s not a feeling, like “bold” or “authentic.” it's the math of your sentences. the kinds of nouns you use. the way you connect ideas. it’s why a paul graham essay sounds like him after a single paragraph.

your voice has three layers. most guides only see the first one. that's why they don't work.

• the surface (the what): word choice, punctuation, jargon. easy to see. easy for ai to copy. think of ben settle signing off his emails with "your pal."
• the structure (the how): sentence rhythm, paragraph shape, transitions, the flow of an argument. this is where your real voice is. the jagged pace of short and long sentences, not the words themselves.
• the cognition (the why): your map of the world. how you get from a premise to a conclusion. this is the hardest part to copy. it's the last thing to die.

what voice guides get wrong

most brand voice guides are useless. they describe a personality, not a process. a notion page that says "we are witty and insightful" and "we are not dry and generic" gives a writer nothing to act on. how do you 'write wittier'? the guide has no answer. it's a mood board. you need a manual.

this leads to a predictable failure. the writer, told to be "witty," has no instructions. so they either write in their own voice, which creates chaos. or they ask an ai to "make this witty." the ai doesn't know your structural dna, so it spits out generic quippy text that sounds like everyone and no one.

step 1: audit what works

you don't invent a brand voice. you find the one you already have. the one that already got you readers and customers. that's the one that works. your only job is to document it.

gather your ten most resonant pieces of writing. resonance isn't likes or views. it's a specific human reaction.

• an email from someone saying "that line hit me."
• a comment that quotes you back to yourself.
• emails with unusually high reply rates.
• posts people share with their own thoughts attached.

ignore the duds. ignore the polite, generic praise. you're looking for the pieces where the signal was clear. this is your "resonance set." it's the only raw material that matters. everything else is noise.

step 2: find your patterns

with your resonance set, you're looking for four measurable signals. you're not reading for meaning. you're reading for structure. like an architect surveying a building, not a tourist reading the plaques. open a spreadsheet.

signal 1: sentence-length variation

paste your text into something like the hemingway app. look at the sentence lengths. are they all the same? or do you have a jagged rhythm of short sentences and long ones? a real voice has a high standard deviation here. a flat, corporate, ai voice has a low one.

signal 2: vocabulary specificity

this is the ratio of concrete nouns ("a porsche 911," "a google sheet") to abstract ones ("solutions," "synergy," "growth"). count them. a high ratio means you ground your ideas in real things. your writing feels credible. a low ratio feels vague. corporate.

signal 3: your transition fingerprint

how do you get from one idea to the next? list all your transition phrases. you'll find you only use a few, over and over. that's your transition fingerprint.

signal 4: structural habits

document your repeating moves. how do you open? with a question? a data point? a story? how do you close? a summary, a call to action, a final question? how do you make an argument? problem-agitate-solve? numbered lists? these are your blueprints.

step 3: build a useful guide

now turn those patterns into a guide. a short doc in notion or google drive. it should be full of mechanical rules and examples. not aspirations.

a useful guide has three parts:

1. the four signals: your exact numbers for sentence length, specificity, and your transition fingerprint.
2. structural rules: your habits, turned into simple commands.
3. before/after table: the most important part. show the rules in action.

here is what a practical rule looks like:

how ai flattens voice

ai is the fastest way to kill a brand voice. the tools are built to produce average, predictable text. they sand down the very imperfections that make a human voice recognizable—the jagged sentence rhythm, the weird transitions, the specific vocabulary.

this isn't a theory. we've measured it.

the pattern is always the same. a writer uses an ai to draft something for speed. they edit it. it feels fine. they do it again. by the third draft, they've stopped writing in their voice and started editing the ai's. their signature opening is gone, replaced by "in today's fast-paced world..." their punchy sentences are gone, averaged into mush. readers don't know why, but the writing suddenly feels generic. soulless. this is voice drift. it happens in weeks, not years.

using ai without drift

you can use ai without losing your voice. but you need a specific workflow. the rule is simple: use ai for anything except the first draft. that first act of writing is where you embed your own patterns. outsource that, and the drift begins.

a safe way to use ai:

1. ai for research. use it to brainstorm topics, generate questions, find data.
2. ai for outlining. ask it for a structure. then edit it heavily until it follows your logic.
3. human for the first draft. write the whole thing yourself. no ai. make it messy. make it fast. but make it yours. this is the only step that matters.
4. ai for editing. once the draft is done, use ai to tighten a paragraph or suggest headlines. you're editing your voice, not its.
5. score for drift. before you publish, run the final draft through a tool like hold your voice. score it against your profile. get a number that proves you still sound like you.

step 4: measure every draft

to protect your voice, especially on a team, a guide isn't enough. you need to measure it. you wouldn't run sales without a crm or engineering without automated tests. writing is the same. every piece of content needs to be scored against your voice profile before it's published.

this creates a real feedback loop. a writer submits a draft. instead of "this doesn't feel right," they get a score. "your sentence-length variation is a 5. we need a 12. break up the paragraphs. your specificity ratio is 0.3. our target is 0.6. replace 'solutions' and 'initiatives' with actual product names."

this turns voice from an art into an engineering problem. it's the only way to keep a sharp voice when multiple people are writing, or when ai is in the mix. if you don't measure it, it drifts.

faq

ai

shashank

founder of hold your voice. writes about voice, ai patterns, and how to sound like yourself.

co-written with ai as sidekick. shashank built the four-signal framework. the ai helped structure the guide and stress-test the arguments.