A brand's voice is how it sounds in writing and speech. It is as important as visual identity in shaping perception, yet it is often overlooked. Two companies can sell the same product but feel completely different based on how they communicate. Voice and tone are what make that difference.
Voice vs. Tone
Voice is the brand's consistent personality expressed through language. It does not change. If your brand voice is friendly and direct, it is friendly and direct everywhere — on the homepage, in error messages, in emails, and on social media.
Tone is the emotional variation within that voice. It adjusts based on context. A brand with a friendly voice might use an encouraging tone in onboarding ("You're all set! Let's get started.") and a sympathetic tone in an error message ("Something went wrong. Let's fix this together."). The voice stays the same — friendly — but the tone shifts to match the situation.
Think of it this way: you have one voice as a person, but your tone changes when you are celebrating with friends versus comforting someone who is upset. Brands work the same way.
Defining Brand Voice
To define a brand voice, start by choosing three to four adjectives that describe how the brand should sound. These should be specific and paired with "but not" qualifiers to prevent misinterpretation:
- Confident but not arrogant
- Casual but not sloppy
- Witty but not sarcastic
- Knowledgeable but not condescending
The "but not" pairings are essential. Without them, "confident" could be interpreted as boastful, and "casual" could result in unprofessional writing. The boundaries keep the voice focused.
Tone Variations by Context
Map out the key contexts where your brand communicates and define how the tone should adjust:
- Marketing and landing pages: enthusiastic and aspirational — you are selling a vision
- Product interface (UI copy): clear and helpful — the user is trying to accomplish a task
- Error messages: calm and reassuring — the user may be frustrated
- Customer support: empathetic and solution-oriented — the user has a problem
- Social media: personable and engaging — the audience expects conversation, not broadcast
- Legal and compliance: straightforward and precise — clarity is paramount
Each of these contexts calls for a different emotional register, but all of them should still sound like the same brand.
Writing Guidelines
Once voice and tone are defined, document them in practical writing guidelines that anyone on the team can follow. Include:
Word Choice
Specify the kind of language the brand uses and avoids. For example:
- Use "start" instead of "commence"
- Use "help" instead of "facilitate"
- Use "buy" instead of "purchase"
- Avoid jargon unless the audience is technical
- Avoid filler words like "very," "really," and "actually"
Sentence Structure
Define the rhythm of the brand's writing. Short sentences feel direct and punchy. Longer sentences feel thoughtful and nuanced. Most brands benefit from a mix, but lean toward whatever matches the voice adjectives. A confident, direct brand should favor shorter sentences.
Formality Level
Clarify where the brand falls on the formality spectrum. Can the brand use contractions (we're, you'll, it's)? Can it start sentences with "And" or "But"? Can it use slang or colloquialisms? These small details have a big impact on how the brand feels.
Examples in the Wild
- Mailchimp: warm, funny, and human. Their voice guidelines even specify that humor should never come at the user's expense.
- Stripe: technical, precise, and confident. They assume the reader is smart and speak to them accordingly.
- Slack: casual and conversational, with personality in microcopy like loading messages and empty states.
Practical Exercise
Take three pieces of existing content from a brand you are building — a homepage headline, an email subject line, and an error message. Rewrite each one three times: once in a formal tone, once in a casual tone, and once in a playful tone. Notice how the same information feels completely different depending on how it is worded. The version that feels most "right" points you toward your brand voice.
Voice and tone are not finishing touches. They are fundamental to how people experience your brand every time they read a word you have written.