Cartesia

ship

Ultra-low-latency voice AI with streaming TTS and voice cloning.

Visit cartesia.ai →Add to kit Open in Noemium

ledger entry · observed by @whysanesanders

Sonic models are built for speed: sub-100 ms streaming makes them excellent for voice agents and real-time apps. Voice cloning is strong, and the free tier is now usable for light projects; paid plans start at $5/mo.

Strengths

Sonic models stream under 100 ms — built for voice agents, not studio takes.
Voice cloning is strong, and the free tier is now usable for light projects.

Known limitations

Free tier credit cap limits sustained production use.
Voice library is smaller than ElevenLabs.
Usage-based pricing requires careful cost forecasting.

Use it when

Real-time voice agents where latency is the product.
Light prototypes before you commit to usage-based spend.

Skip it when

You need a large voice library closer to ElevenLabs.
Sustained production would blow the free credit cap.
You cannot forecast usage-based TTS cost.

Buy-check

·Price — freemium, free tier (20K credits/mo); paid plans from $5/mo as of 2026-08-19. Open the pricing page, not a screenshot.
·Free tier — Free tier exists — burn it first.
·Cancel fallout — What happens to your data/projects on cancel — check the ToS, not the FAQ.
·Seat math — Per-seat pricing multiplies quietly. Count seats before the annual plan.
·Who skips it — Also skipped when: You need a large voice library closer to ElevenLabs.; Sustained production would blow the free credit cap..