Cartesia vs Speechify
A side-by-side comparison of Cartesia and Speechify, two Voice tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
| Attribute | Cartesia | Speechify |
|---|---|---|
| Category | Voice | Voice |
| Pricing | FREEMIUM | FREEMIUM |
| License | Proprietary | Proprietary |
| Deployment | Cloud | Cloud |
| Platforms (differs) | API | iOS, Android, Web, Browser extension, macOS, Windows, API |
| Model support | Single model (proprietary) | Single model (proprietary) |
| Vendor (differs) | Cartesia | Speechify |
The honest brief
Cartesia
State-space Sonic models hit sub-100ms first audio — the latency floor for real-time voice agent loops.
- Streaming over WebSocket for fast first audio
- State-space architecture, not transformer
- Streaming-first WebSocket protocol depth
- Cost-competitive at scale
- Long-form expressive texture trails ElevenLabs
- Fewer voices than ElevenLabs catalog
- API-only, no end-user app
Speechify
Built for listening, not voiceover — OCR scans any document and reads aloud up to 4.5x speed across every platform.
- OCR reads scanned text and PDFs
- Up to 4.5x playback speed
- iOS, Android, web, extension, desktop
- Separate Studio + API for developers
- Best features behind paywall
- Voice cloning lives in separate product
- Premium voices gated to higher tiers