To keep a consistent brand voice with AI, write your voice down once — three to five tone words, a formality level, emoji and punctuation rules, typical sentence length, and your point of view — plus a short do/don't list and two or three example posts. Feed that same profile into every generation instead of re-describing your brand each time. That single reference is what stops AI content drifting into a generic, could-be-anyone tone.
Left to its own devices, AI writes in a safe, cheerful, middle-of-the-road register — because that is the average of everything it has read. It has no idea that your kopitiam is dry and cheeky, or that your aesthetic clinic is calm and precise, unless you tell it. So the first cause of drift is simply the default average.
The second cause is inconsistent prompting. If you type the instructions slightly differently every time — "make it fun" one day, "keep it professional" the next — you get a different personality each post. Over a month, your feed reads like it was written by five different people. Followers may not name it, but they feel it: the brand stops being recognisable.
The fix is not better prompts every time. It is a fixed voice definition you reuse.
"Voice" sounds fuzzy, but it breaks down into a handful of concrete dimensions you can write as rules. Once each dimension has an explicit setting, both a human writer and an AI have something firm to hit. Here is how to specify each one:
| Voice dimension | How to specify it | Example setting |
|---|---|---|
| Tone | Pick 3–5 adjectives, and name the opposites you're avoiding | "Warm, cheeky, confident — never corporate or salesy" |
| Formality | Choose a level on a scale: casual → conversational → neutral → formal | "Conversational; we speak like a friendly shop owner, not a brochure" |
| Emoji & punctuation | State how many emojis, which ones, and whether exclamation marks are allowed | "Max 2 emojis per caption; no ✨ or 🔥 spam; one exclamation mark max" |
| Sentence length | Set a rough rhythm — short and punchy, or longer and flowing | "Mostly short sentences. One idea per line. Occasional fragment for punch." |
| Point of view | Decide on I, we, or the brand name — and how you address the reader | "We" for the brand, "you" for the customer; never third-person |
| Vocabulary | List words you always use and words you ban | "Say 'team' not 'staff'; 'members' not 'customers'; never 'cheap'" |
You do not need a 40-page brand bible. One page beats a fat document nobody opens. Include five blocks:
This is a real decision for Singapore brands, and the answer is: pick a deliberate level and write it into the guide. Local flavour builds warmth and signals you're one of us — but only where it fits the category.
Defining the voice is half the job; the other half is applying it the same way every time. Three habits do it:
Re-pasting a voice guide into every prompt is exactly the manual step that breaks down at scale. Pulse's Brand Setup captures your brand once — tone, vocabulary, do/don't rules and example posts — and stores it, so every caption and visual it generates for the month is built from that same profile. You're not re-explaining yourself post by post; the voice is the default. The flow stays in your hands: Pulse plans and generates, then you review and approve everything before anything goes out. Consistency comes from the stored profile, not from you being disciplined about prompts at 11pm.
AI defaults to a generic, upbeat, middle-of-the-road tone because that is what most training text looks like. Unless you explicitly define your voice — tone words, formality, emoji use, sentence length and point of view — every prompt starts from that neutral average. It also drifts because you phrase each prompt slightly differently, so the model has no fixed reference to anchor to.
Write down five things: three to five tone words, a formality level, your emoji and punctuation rules, typical sentence length, and your point of view (I, we, or brand name). Add a short do and don't list and two or three example posts that sound exactly right. That one page is enough for a person or an AI to stay on-voice.
It depends on your audience and category. A neighbourhood kopitiam, a hawker brand or a youth streetwear label can lean into light Singlish and local references to feel warm and real. A law firm, clinic or B2B service should keep it clean and standard English. Pick a level, write it into your voice guide as a rule, and apply it consistently rather than sprinkling it randomly.
Yes — examples are the single most effective way to lock a voice. Two or three real posts that sound exactly like you teach the model more than any list of adjectives. Include one caption, one longer post and one reply so it captures your range, not just one format.
Read it against your do and don't list and ask one question: would a regular follower know this came from us with the logo covered? If yes, ship it. If it feels like it could belong to any competitor, tighten the tone words or swap in a stronger example and regenerate.
Yes. Your core voice stays the same everywhere; only the format and pacing shift — shorter and punchier on TikTok, a little more context on Facebook. Define the voice once, then note per-platform tweaks as small exceptions rather than three separate personalities.
Pulse learns your brand once in Brand Setup — tone, vocabulary, do and don't rules and example posts — and stores it. Every caption and visual it generates afterwards is built from that same profile, so a month of content stays on-voice instead of you re-explaining yourself in every prompt. You still review and approve everything before it goes out.