Rime text-to-speech for Bolna AI voice agents

What is Rime used for in a Bolna voice agent?

Rime is a text-to-speech provider that gives your Bolna agent natural, conversational voices, with good prosody for back-and-forth dialogue. Pick it for English agents where the voice needs to sound relaxed and human rather than read out.

How do I set up Rime with Bolna?

1. Connect your Rime account at platform.bolna.ai/auth/rime.
2. Open your agent in Agent Studio and go to the Languages tab.
3. In the Voice section, choose Rime as the provider, then pick arcana or mistv2 and a voice.
4. If you create the agent through the API, set the synthesizer provider to rime and include language in its config. It is required.
5. Place a test call and adjust the buffer size under Advanced settings if the first words feel slow.

For more detail, see the Rime setup guide in the Bolna docs.

Which Rime models and languages does Bolna support?

Model	What it is for	Languages
arcana	Most expressive and natural speech, fine prosody control	English, Spanish
mistv2	Fast synthesis for real-time conversation	English, Spanish

Rime voices span different ages, accents and speaking styles. Flagship voices include luna, celeste, orion, ursa, astra, esther, estelle and andromeda.

What can you build with Rime and Bolna?

Conversational support agents. Use conversational voices that sound calm and professional during support calls.

IVR replacement. Give callers a clear, natural voice in automated phone menus instead of a stiff recorded prompt.

Healthcare and counselling calls. Use warm, expressive voices for sensitive conversations where tone matters.

Comparing voices. Test Rime against Cartesia or ElevenLabs on the same agent to find the voice that fits your callers.