Why voice matters
Voice is one of the strongest signals of trust and professionalism a caller receives. A well-matched voice reinforces your brand identity, while a mismatched one can undermine an otherwise well-built agent. Consider:- Accent and region — Match the voice to your caller base. A UK audience expects a different accent than a US one.
- Tone and texture — Professional services benefit from calm, authoritative voices. Hospitality and retail may suit warmer, more conversational tones.
- Consistency — Adjust stability settings to control how much the voice varies between turns. Higher stability sounds more predictable; lower stability sounds more natural.
Where to start
If you are setting up voice for the first time, start with Choosing a good voice for selection guidance, then configure your choice in Agent Voice.Voice pages
Agent Voice
Select a voice and fine-tune stability, clarity, and other parameters for your agent and disclaimer voices.
Voice library
Browse, preview, and compare all available voices across providers.
Choosing a good voice
Best-practice guidelines for matching voice to your brand, audience, and industry.
Multi-voice
Assign multiple voices to simulate a team of agents within a single project.
Add a voice
Configure voices programmatically using provider classes.
Custom voice
Request a brand-exclusive cloned voice (enterprise).
Voice configuration
Configure greeting audio, disclaimer playback, and call handling settings.
Voice conversation style guide
These guidelines help your voice agent sound natural rather than robotic. They focus on the linguistic patterns that make spoken conversations feel human.Social presence markers
Natural conversation includes patterns that acknowledge conversational history and participants. These contribute to a sense of collaboration rather than rote routine-following. Use progressive tense for active collaboration:- “I’m not seeing any accounts under that phone number…” conveys active collaboration
- “I don’t see any accounts” sounds too definitive
- “How about Wednesday instead?” (not “How about Wednesday instead of Tuesday?”)
- “In that case, how does Saturday at 2:30 sound?” (not “Since you said you prefer weekends…”)
- “Could you read me your account number?” rather than “Could you read your account number aloud?”
- “Can you log into your account for me?” rather than “Can you log into your account?”
- “When were you trying to come in?” rather than “When are you trying to come in?”
Avoid over-explaining
LLMs tend to justify every action in a way humans don’t. Most of the time, the important information and the request can be formed into a single sentence:- “No problem, what’s your account number?” rather than “In order to check for outages, I’ll need to look up your account. Could you tell me your account number?”