Cartesia

★ 4/5 · Music/Voice

Real-time TTS API with Sonic model family delivering ultra-low latency (40ms) speech generation for enterprise voice applications.

Pros

Fastest TTS latency (40ms)
ranked #1 in Speech Arena leaderboard
three core products (Sonic TTS, Ink STT, Line voice agents)
cloud/on-premise/on-device deployment

Cons

Enterprise pricing only
no transparent pricing structure
requires contact for quotes
high barrier to entry

Cost

Free is $0/month with 20,000 credits a month and prepaid agents at $1/month, covering text to speech and speech to text; Pro is $5/month with 100,000 credits and prepaid agents at $5/month, adding a commercial licence and instant voice cloning; Startup is $49/month with 1.25 million credits and prepaid agents at $49/month, adding pro voice cloning and organizations; Scale is $299/month with 8 million credits and prepaid agents at $299/month, adding priority support and high concurrency; Enterprise is quoted on request with volume agent pricing, SSO, DPAs and BAAs; voice agent calls run $0.06 a minute, Cartesia telephony numbers $0.014 a minute, and professional voice cloning costs 225 credits per added voice accent.

Verdict

Best for enterprises requiring ultra-low-latency real-time voice synthesis for financial services, healthcare, and government applications.

Visit Cartesia