Cantari vs Cartesia Sonic
Cantari
cantari.io
Cartesia Sonic
cartesia.aiSide by side
| Figure | Cantari | Cartesia Sonic |
|---|---|---|
| Price from | $15/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| API | — | Yes |
| Plans published | 3 | 6 |
| Spec score · Game Voice Generators | 8.4 (#14) | 8.6 (#12) |
| Integrations | The privacy policy names OpenRouter and engine vendors as processors, Supabase for account and library data, Vercel for the site, and Stripe for payments. | Managed Agents can use Cartesia-provisioned numbers, import Twilio numbers, or connect a carrier over SIP. |
| Product | Cantari is a studio that routes text-to-speech jobs to multiple voice engines and lets users generate audio from scripts. | Sonic is a text-to-speech model for real-time voice applications. |
| Security | Cantari says account data is protected by row-level access controls and encrypted in transit and at rest by its hosting providers. | Cartesia lists HIPAA compliance, SOC 2 Type 2, GDPR, and PCI on the Sonic page. |
| Support | The pricing page says a real person answers email on every plan. | Cartesia's documentation directs users to Discord to chat with the Cartesia team and community for help. |
| Voice cloning | Voice cloning is marked as coming soon, with one owned cloned voice planned for Creator and five for Studio. | Instant voice cloning can use 10 seconds of audio, while Pro Voice Clone training uses 30 minutes or more from one speaker. |
Plans
Cartesia Sonic
- FreeFree
- Pro$5 a month
- Startup$49 a month
- Scale$299 a month
- FreeFree
- EnterprisePriced on request
In their own words
Cartesia Sonic
Cartesia Sonic is a text-to-speech model for real-time voice applications, available through the web and an API. It has sub-90ms latency and supports 44 languages. Sonic can interpret emotional subtext and add non-verbal expressions such as laughter to transcripts. Its localization feature carries emotion, tone, and speaker identity into another language, while custom pronunciation dictionaries let users set how proper nouns and domain terms are spoken. For voice agents, Managed Agents combine Ink-2 speech-to-text, a selected LLM, and Sonic-3.6 text-to-speech, with turn-taking and interruption handling. Phone connectivity can use Cartesia-provisioned numbers, imported Twilio numbers, or a carrier over SIP. Cartesia lists HIPAA compliance, SOC 2 Type 2, GDPR, and PCI. It says Sonic can be deployed on-premise, in a customer VPC on AWS, GCP, or Azure, or through OEM licensing. A free plan includes 20K credits per month and two concurrent text-to-speech requests. Paid plans start at $5/mo; higher tiers raise credit allowances and list capabilities including organizations and priority support.