Cartesia Sonic is a streaming text-to-speech API that generates human-like speech with emotional expressions and laughter. It is designed for real-time voice agents requiring sub-100ms latency and context-aware pronunciation.
No migration guide is currently listed for this service.
Significant foreign legal exposure risk
Significant foreign ownership or control risk
More dimensions coming soon
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Statement 17/03/2026, confidence 90%.
R11 audit correction. At #1, Sonic sets the standard for ultra-low latency. It's conversational AI that's fast, fluid—and virtually human. From San Francisco to Tokyo, Sonic leads in latency at P50 to P99 consistently and reliably.