Cartesia (Sonic)

Cartesia
class B live

Ultra-low-latency streaming TTS (Sonic) built for voice agents; instant cloning, multilingual; #2 on Artificial Analysis Speech Arena.

Layer 1 — factual axes

API & price public · credit-based (~$50/1M chars) secondary source ↗ 2026-07-04
Voices not published unverified
Voice cloning yes · instant secondary source ↗ 2026-07-04
Languages 42 secondary source ↗ 2026-07-04
Weights closed official source ↗ 2026-07-04
Free tier limited official source ↗ 2026-07-04

Layer 2 — output quality

Eligible for Best for APIVoice cloningBest free

Ultra-low-latency streaming TTS (Sonic) built for voice agents; instant cloning, multilingual; #2 on Artificial Analysis Speech Arena.

Data as of 2026-07-04 · verified 2026-07-04. One ruler for all tools. How we measure ↗