Voice models made for human conversation
One model that hears the call, reasons over it, and speaks. Text comes out before audio does, so every word can be checked before a caller hears it. Fine-tune it on your calls and run it where your data lives.
Press play. The transcript and the tool calls appear as they happen.
Tool calls, guardrails, and what Prism hears in the caller's voice show up here as the call runs.
Transcript
- Prism0:00Hello, this is Sam at Riverbend Family Health. How can I help you today?
- Caller0:04Um, I think I need to reschedule my appointment.
- Prism0:07I can help with that. Could I please have your full name?
- Caller0:11John Smith.
- Prism0:13J-O-H-N S-M-I-T-H. Is that right?
- Caller0:18Yep.
- Prism0:20Thanks, John Smith. Could I please have your date of birth?
- Caller0:242, 17, 1990.
- Prism0:27Thanks. February 17th, 1990, you're verified. I'm pulling up your appointment now.
- Prism0:33You have a follow-up with Dr. Patel on Tuesday, October 27th at 10 o'clock in the morning. When would you like to move it to?
- Caller0:42Um, do you have anything available, like, middle of November instead?
- Prism0:46I can offer you Thursday, November 5th at 9 o'clock in the morning, or Friday, November 6th at 2:30 in the afternoon. Which works better for you?
- Caller0:55Let's do November 6th at, um, in the afternoon. Sorry, I'm, I'm like super stressed out.
- Prism1:03I understand. Let's get this sorted for you.
- Prism1:06I have you down for Friday, November 6th at 2:30 in the afternoon with Dr. Patel. The old slot on Tuesday, October 27th has been released.
- Prism1:15Would you like a text or email confirmation? If so, please provide your phone number or email address.
- Caller1:21Um, no, I'm okay. I have it written down. Thanks so much.
- Prism1:23Is there anything else I can help you with today?
- Caller1:27Uh, I think that's it.
- Prism1:28Thank you, John. Have a good rest of your day.
- Caller1:32You too. Thank you. Goodbye.
Models for the whole conversation
No matter where you are on your voice journey, we have the model you need to keep customers on the line.
Speech-to-speech
A single model that listens, reasons, and replies in one pass. Built for the calls you can't get wrong.
Text-to-speech
Voices that keep customers on the line. Fast enough for live calls, with control over accent, pace, and tone.
Speech-to-text
Transcription for live calls. Same key, same deployment, same security review as your voices.
For the calls you can't get wrong
When the voice is talking to a patient, a cardholder, or a hotel guest deciding whether to stay the night, quality stops being a nice-to-have. Rime delivers the speed real conversations need and runs inside your own environment when compliance demands it.
A voice for every conversation
Choose from 600+ voices, then shape accent, pace, and tone until it fits your brand and your industry. What comes out sounds like a person who wants to be on the call and not a system working through a script.
Built by linguists
Rime was founded by people who study how language actually works. That's why our voices land the rhythm, stress, and warmth of real speech instead of the hollow tones you hear everywhere else. We treat voice as a craft, not a feature to bolt onto a stack.
Spoken like a local
From the teams that put us on the line
"Prism's interactivity, interruption handling, and latency is terrific."
"Dialpad has been a design partner on Prism from the start. We’re looking forward to rolling it out across our agentic products."
"Mist v3 on a co-located endpoint has been a 3x latency improvement for us. We're consistently seeing sub-100ms TTFB in production — that's the difference between a conversation that feels human and one that doesn't."
"The latency stays low even under heavy loads. It's a true enterprise production-grade system."
"It was clear that the voice made a real impact on the phone. When guests feel comfortable right away, everything else goes more smoothly."
"In healthcare, the voice is the first point of trust. Patients need to feel heard, not processed — and that starts with how the AI sounds and how fast it responds."
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"Mist v3 is incredibly fast and deterministic pronunciation is a game-changer. When you're powering live conversations at scale, you can't have a model guessing brand names or proper nouns."
