Create a Brand Voice Guide So AI Writes Like You

AI writes competent copy in nobody’s voice. That’s the problem a brand voice guide solves.

A voice guide is a short document that defines how your business sounds in writing: the words you use, the words you refuse, the rhythm of your sentences, the way you treat the reader. Give it to an AI at the start of a session and the drafts come back sounding like you instead of sounding like AI.

Why this matters

Every business using AI without a voice guide is drawing from the same well. The output is grammatical, polite, and interchangeable. Readers have learned to scroll past it.

What the missing guide costs you:

• Your content sounds like everyone’s. The default AI voice is the average of the internet. Averages don’t get remembered.
• You become the bottleneck. If the voice lives only in your head, every draft from a freelancer or an AI needs your rewrite before it can ship.
• Trust leaks at the seams. A warm website, a stiff email, and a hype-heavy social post read as three companies. Inconsistency is quietly expensive.

Here’s the part worth sitting with: your voice is one of the few things a competitor can’t copy. They can match your prices and imitate your services. They can’t be you. A voice guide is how you scale the one asset that’s yours alone.

What a voice guide covers

Adjectives alone teach nobody. A guide that says “professional yet friendly” could belong to a bank or a bounce-house rental. Examples do the real work. Five sections:

1. Who you’re talking to.

One paragraph on your reader: what they know, what they worry about, how much time they have. Every rule that follows exists because of this person.

2. The voice, with proof.

A one-paragraph description of how you sound, then three to five principles, each with a yes example and a no example. “Calm over urgent: yes, ‘This is worth fixing, but it isn’t an emergency.’ No, ‘Every day you wait, you’re losing customers.’” That pair teaches more than a page of adjectives.

3. Say this, not that.

A two-column table. Left: the words your customers actually use. Right: the industry words you’d use at a conference. Customers say “show up on Google.” The industry says “organic search visibility.” Write with the left column.

4. The banned list.

Words and phrases that never appear: the hype, the clichés, the phrases every AI reaches for. This is the fastest single fix for sounding like a robot.

5. Mechanics.

Sentence length, contractions or not, punctuation habits. Small rules, big cumulative effect.

Starting from scratch: choosing your voice

Everything above assumes you have writing to learn from. Plenty of owners don’t. If you’ve never written much, you get to choose your voice deliberately, the way you chose your business name.

Voice attributes are the building blocks. These are the most common ones, with the kinds of businesses each tends to fit:

• Warm. Welcoming and personal, like a good host. Fits hospitality, family services, anyone selling comfort.
• Conversational. Reads like talk across the counter. The safe default for most small businesses.
• Direct. Short sentences, no padding, answer first. Fits trades, consultants, anyone selling competence.
• Calm. Steady and unhurried, never salesy. Fits health, finance, and any purchase people find stressful.
• Authoritative. The confident expert who has seen this before. Fits law, medical, specialty trades.
• Empathetic. Leads with understanding before advice. Fits care work, counseling, anything people feel vulnerable buying.
• Playful. Light, quick, a little fun. Fits pets, kids, food, events. Hard to fake, so skip it if it isn’t in you.
• Bold. Big claims, high energy. Fits fitness and competitive markets, and ages into hype fast, so handle with care.
• Polished. Refined and understated, lets quality speak quietly. Fits luxury and high-ticket services.
• Down-to-earth. Practical, modest, a little dry. Fits repair, agriculture, and anywhere plain talk earns trust.

How to choose:

• Pick three, no more. Eight attributes cancel each other into mush. Three force a real decision.
• Match the buyer’s state of mind. Someone hiring a roofer after a storm wants calm and direct, not bold. The buyer’s mood outranks your industry’s habits.
• Check for contradictions. Warm and direct combine beautifully. Urgent and calm can’t live in the same paragraph.
• Run the phone test. Could you keep this voice up in a live phone call with a customer? If not, it’ll crack in writing too.

Putting it to work

• Collect writing that already sounds like you. Three to five samples: an email you took time over, your best page of website copy, a text a customer said was helpful. This is the raw material.
• Collect your customers’ words. Pull phrases from your reviews. The words buyers use to praise you belong in your vocabulary, and a later article in this series covers mining reviews properly.
• Run the prompt below. It builds the guide from your samples instead of from thin air.
• Strike what isn’t you. Read the draft aloud. Anything you’d never say out loud to a customer gets cut, and any phrase you say constantly gets added.
• Test it immediately. Have the AI write a new email using the guide. If it still doesn’t sound like you, the guide is missing a rule. Fix the guide, not the email.

Then use it everywhere: pasted at the start of AI sessions, sent to every freelancer, kept next to your brand style guide.

One honest limit. A voice guide records a personality; it can’t invent one. If your writing samples are stiff, the guide will faithfully preserve stiff. Pick samples from moments you sounded most like yourself, even if they’re texts rather than polished copy.

Build me a brand voice guide from my real writing. Here is what I'm giving you:

My business and my typical customer: [one or two sentences: what you do, who buys, what they worry about]

Writing samples that sound like me:
[paste 3 to 5 samples: emails you wrote, your best web copy, helpful texts to customers. No samples? Delete this section and use the next one instead]

OR my chosen voice attributes, if I have no writing samples:
[pick three: warm, conversational, direct, calm, authoritative, empathetic, playful, bold, polished, down-to-earth]
[add one or two sentences on how you actually talk to customers in person]

Words my customers use about me, from reviews:
[paste a handful of review sentences, or write 'none yet']

From this material, produce a brand voice guide with these sections:
1. The reader: one paragraph describing who I'm writing to and what that means for how I write.
2. The voice in one paragraph.
3. Four voice principles, each with one yes example and one no example, written in my voice.
4. Say this, not that: a two-column list of 8 to 10 pairs, my customers' plain words on the left, industry jargon to avoid on the right.
5. Banned words: 10 to 15 words or phrases I should never use, including common AI cliches and any hype that doesn't match my samples.
6. Mechanics: rules for sentence length, contractions, and punctuation based on how my samples actually read.
7. A worked example: one short customer email written in my voice, so I can check you got it right.

If my samples contradict each other, ask me which one sounds most like me instead of averaging them. If I gave you chosen attributes instead of samples, build the guide from those attributes and my business description, write every example in that chosen voice, and warn me if my three attributes contradict each other.