Sonic-3
ExternalCartesia Sonic delivers ultra-low latency text-to-speech (TTS) for real-time voice agents, achieving ~90ms worldwide with expressive features like emotions, laughter, and instant voice cloning from short audio clips. Supporting 40+ languages covering 95% of global markets, including strong Indian language support, it enables natural, context-aware conversations that outperform competitors in speed and quality. Ideal for developers and enterprises in customer support, gaming, healthcare, and finance, Sonic provides enterprise-grade compliance (SOC 2, HIPAA) and is trusted by ServiceNow, Quora, and Tavus for production-scale deployments.
Description
Cartesia Sonic delivers ultra-low latency text-to-speech (TTS) for real-time voice agents, achieving ~90ms worldwide with expressive features like emotions, laughter, and instant voice cloning from short audio clips. Supporting 40+ languages covering 95% of global markets, including strong Indian language support, it enables natural, context-aware conversations that outperform competitors in speed and quality. Ideal for developers and enterprises in customer support, gaming, healthcare, and finance, Sonic provides enterprise-grade compliance (SOC 2, HIPAA) and is trusted by ServiceNow, Quora, and Tavus for production-scale deployments.
Key capabilities
- Ultra-low latency streaming TTS (~90ms P50-P99)
- Multi-language support (40+ languages, 95% world markets)
- Instant voice cloning from 3-10s audio
- Expressive controls (emotions, laughter, speed via tags)
- Enterprise compliance (SOC 2 Type II, HIPAA, PCI Level 1)
Core use cases
- 1.Real-time conversational voice agents
- 2.Customer support and concierge services
- 3.Gaming and companion apps
- 4.Healthcare and finance applications
- 5.Localization and multilingual content
- 6.Logistics, sales, recruiting, hospitality
Is Sonic-3 Right for You?
Best for
- Developers building low-latency voice agents
- Enterprises needing compliant, scalable TTS
- Multilingual apps targeting global/Indian markets
Not ideal for
- No-code users seeking full conversational AI
- High-volume non-real-time content creation
- Applications requiring vast pre-built voice libraries
Standout features
- Developer API and SDKs
- Interactive Playground for testing
- Curated voice library with personas
- Pro Voice Clones for fine-tuning
- Context-savvy acronym handling
- High uptime and scalability
Pricing
Startup
Free
Scale
Pro
Enterprise
User Feedback Highlights
Most Praised
- Exceptional low latency for natural real-time conversations
- 5.0/5 Product Hunt rating; praised for speed and quality
- Trusted by enterprises like ServiceNow and Tavus
- Superior short-clip voice cloning with accents/emotions
- Reliable API with good uptime
Common Complaints
- Real-world latency up to 200-300ms with network delays
- Smaller voice library than competitors like ElevenLabs
- Not a full AI agent; requires separate integrations
- Limited parallel streams on self-serve tiers
- Occasional integration bugs in third-party libs