Outbound doesn’t just live or die on deliverability. It lives or dies on whether your prospects believe the message sounds like you.

At CallSine, we built our Outreach Agents to fix that. Instead of asking AI to “be human” in the abstract, our Agents capture the DNA of your brand voice—so every Outreach Agent communicates in a way that feels natural, credible, and consistent.

Why Voice Matters

Reps win deals by building trust. Trust doesn’t come from sending 1,000 emails a day—it comes from showing up with a voice prospects recognize and respect.

That’s why we let you embed your brand’s tone, style, and personality directly into your Outreach Agent. It’s not just personalization at the prospect level. It’s personalization at the company level.

How It Works

1. Start with an Example

Grab an old email your team has sent that already feels on-brand. Maybe it’s light and witty. Maybe it’s confident and direct. That sample becomes the foundation of your Style Guide.

Example:

“I’ll bet your calendar is already stacked higher than a Jenga tower. I’ll keep this quick—no topple, I promise.”

This isn’t just copy. It’s a blueprint for tone.

2. Extract Voice & Formatting Notes

From that sample, turn voice into rules. We recommend giving the email to an LLM and asking it to generate a style guide based on it. For example:

• Voice & Tone: Conversational, respectful of time, confident without jargon, lightly humorous.

• Formatting: Short paragraphs, casual pacing, avoid feature dumps, focus on credibility + curiosity.

Already have a brand guide? Even better. You can feed it directly into the system.

3. Add It to Your Outreach Agent

In the Campaign Editor, go to Settings → Style Guide. Replace the default with your notes. You can even create different style rules for first-touch emails, follow-ups, or LinkedIn messages.

4. Test and Adjust

Generate sample outreach in the People tab. If the tone feels slightly off, refine your Style Guide until it clicks. The more specific your guidance, the more authentic the output.

Why This Changes the Game

Other tools let you edit messages after the fact. That’s like fixing a leaky faucet one drip at a time. The Style Guide stops the leak at the source.

Your Outreach Agent doesn’t just write more emails. It writes your emails. It reflects your values, your tone, your way of building trust. And it does it at scale.

From “AI Voice” to Your Voice

In an industry where too many companies settle for robotic outreach, your voice is a competitive edge. With CallSine’s Style Guide, that edge scales without breaking.

Your prospects won’t just get a message. They’ll get a message that feels like it could only have come from you.

Ready to make your Agent sound like you? Read the full help article here.