How to use AI for content without losing your brand voice
A practical system for keeping AI-assisted writing sounding like you, with a one-page voice guide you can make today.
The tell-tale sign of AI content isn't bad grammar, it's the opposite: perfectly smooth, perfectly generic prose that could belong to any company on earth. "In today's fast-paced world…" If your customers can't tell your posts from a competitor's, the AI didn't fail. The setup did. Here's the fix.
Voice is decisions, not vibes
Most businesses describe their voice as "friendly but professional", which describes approximately everyone. Voice is actually a set of concrete decisions: Do we use contractions? Do we joke, and about what? Long sentences or short? Do we say "customers", "clients", or "you"? First person "I" or "we"? Write down ten of these decisions and you have a voice guide. Vibes are unenforceable, decisions aren't.
Build your one-page voice guide
Take an hour and answer these on one page:
- Three adjectives that describe us, and one that explicitly doesn't
- Words and phrases we always use (ours, industry-specific, regional)
- Words and phrases we never use (buzzwords you hate count double)
- Two short real examples of our best writing, pasted in full
- One paragraph of "how we sound when things go wrong", apologies reveal voice
Paste this page at the top of every AI session that produces public words. It's the single highest-leverage document your marketing has.
Feed examples, not adjectives
"Write in our brand voice" fails because the model has to guess what that means. "Here are two paragraphs we wrote, match this" works because pattern-matching is what models do best. Your two best real examples are worth more than any description.
The 80/20 human pass
Let AI do the 80%: structure, coverage, the parts any competent writer would produce. Then spend your editing time only on the 20% that carries voice: the opening line, the closing line, the one opinion, the one specific detail. You don't need to humanise every sentence, you need to sign the right ones.
The read-aloud test
Before anything publishes, read the first and last paragraph out loud. If you can imagine a rival company posting the same words unchanged, rewrite until you can't. Your voice is what customers recognise when the logo is cropped out.
AI will happily write like everyone else forever. Your job isn't to stop it, it's to show it what you sound like, every single time. The voice guide makes that a paste, not a prayer.