Text-to-Speech · Compare
Speechify vs Cartesia Sonic
Cartesia Sonic is engineered for ultra-low latency in real-time applications. Speechify provides sub-300ms streaming from $6 per 1M characters with transparent per-character billing, versus Cartesia's credit-based model that works out to roughly $24-40 per 1M.
Speechify
Cartesia Sonic
Speechify at a glance
from $6
per 1M characters
<300ms
first byte, streaming
30+
languages
1,500+
voices
| Capability | Speechify | Cartesia Sonic |
|---|---|---|
| Price (per 1M chars) | From $6 / 1M | Credit-based; roughly $24-40, derived from credit bundles |
| Pricing model | Per character; no credits, no token math | Credit-based; effective per-character rate varies by plan |
| Voice quality | Proprietary neural voice models | Natural and expressive; built for real-time |
| Voices | 1,500+ | Curated library plus cloning |
| Languages | 30+ | Growing multilingual coverage; fewer languages |
| Voice cloning | Professional voice cloning included | Instant voice cloning supported |
| Latency | Sub-300ms first byte, streaming | Ultra-low latency; a core strength |
| Commercial use / free tier | Commercial use on every plan; 50K chars/month free | Free tier is non-commercial; commercial use requires a paid plan |
The verdict
Cartesia is worth it when ultra-low latency is the single most important requirement. Speechify is the better value for most workloads, with per-character pricing, commercial use on every tier, and a larger voice and language footprint.