The fastest TTS engine, natively integrated.
Cartesia Sonic brings 90ms neural speech synthesis, 200+ production voices, and enterprise-grade compliance into every Ortavox voice agent — with zero markup and full BYOK control.
About Cartesia
The infrastructure layer for real-time speech
Cartesia builds the fastest neural text-to-speech models in production. Their flagship model, Sonic, achieves 90ms first-byte latency — making it the only TTS engine fast enough to fit inside a sub-600ms conversational AI pipeline without degrading the user experience.
With 200+ production-ready voices across 13 languages, SOC2 Type II compliance, HIPAA readiness, and a 3-second voice cloning capability, Cartesia is the TTS provider of choice for enterprise voice AI deployments worldwide.
Integration Benefits
Why Cartesia on Ortavox
90ms Latency
Cartesia Sonic is the fastest enterprise TTS engine in production. At 90ms first-byte latency, it fits natively in Ortavox's sub-600ms pipeline without consuming the latency budget.
200+ Production Voices
Access Cartesia's full voice library — from professional US English to multilingual neural voices — directly from your Ortavox agent configuration dashboard.
SOC2 Type II + HIPAA
Cartesia meets the same enterprise compliance bar as Ortavox. Both platforms are SOC2 Type II certified and HIPAA-ready for healthcare and financial services deployments.
13 Languages
English, French, Spanish, German, Portuguese, Italian, Japanese, Korean, Mandarin, and more. Cartesia's multilingual support pairs with Ortavox's MENA and EU expansion roadmap.
Voice Cloning (3s)
Clone a brand voice from 3 seconds of reference audio. Enterprise customers can deploy a consistent, recognizable voice identity across all their Ortavox-powered AI agents.
BYOK Compatible
Bring your own Cartesia API key. Ortavox passes through Cartesia costs transparently with no hidden markup — pay exactly what Cartesia charges you.
Get Started
Integrate Cartesia in 3 steps
Add your Cartesia API key
Paste your Cartesia API key in the Ortavox dashboard under Settings → TTS Providers.
Select Sonic as your TTS provider
In your agent config, choose Cartesia Sonic from the TTS dropdown. Browse and preview voices.
Deploy instantly
Your agent immediately routes TTS synthesis through Cartesia Sonic. No code changes required.
// Agent config — cartesia TTS example
{
"tts": {
"provider": "cartesia",
"voice_id": "87748186-23bb-4158-a1eb-332911b0b708",
"model": "sonic-2",
"language": "en"
}
}Performance
Cartesia vs. other TTS providers
| Provider | Latency | Price / 1K chars | Voice cloning | HIPAA |
|---|---|---|---|---|
| Cartesia Sonic ✓ | ~90ms | $0.015 | Yes (3s) | Yes |
| ElevenLabs Flash | ~75ms | $0.030 | Yes | Partial |
| Mistral Voxtral | ~70ms | $0.016 | Yes (3s) | No |
| OpenAI TTS-1-HD | ~200ms | $0.030 | No | Yes |
| Azure Neural TTS | ~120ms | $0.016 | Custom only | Yes |
Compliance
Build with Cartesia + Ortavox today
Join the Ortavox beta and get access to Cartesia Sonic with no markup on API costs. 100 free minutes per month. No credit card required to start.
Questions? Reach us at contact@ortavox.ai