Cartesia
Free Tier AvailableUltra-low latency streaming voice engine (Sonic) for voice agents.
⚠️ Notice: Pricing, tier limits, and features change frequently. Data verified October 2026. Always confirm live terms on official websites.
| Category | Audio & TTS |
|---|---|
| Paid (Pro) Plan Price | From $5.00 / mo (Pro Tier) |
| Basic Free Tier | ✓ Available ($0 Free to start without credit card) |
| Developer API Support | ✓ Supported (Pay-as-you-go available) |