Humanness Index™ · Provider
Speechify grew from one of the most used consumer reading apps into a full voice platform, and SpeechifyAI Build exposes the same text to speech stack that powers its products as a developer API.
Standings as of Jul 27, 2026, 22:56 UTC
| Rank | Model | Humanness | Latency | Languages | Price / 1M chars |
|---|---|---|---|---|---|
| #7 | Simba 3.2 | 83 | — | English | $10 |
Speechify grew from one of the most used consumer reading apps into a full voice platform, and SpeechifyAI Build exposes the same text to speech stack that powers its products as a developer API. The Simba model family spans the streaming native Simba 3.2 flagship, the earlier streaming Simba 3.0, and the legacy multilingual and English models.
Sources: speechify.ai, docs.speechify.ai
The API serves batch and streaming endpoints with SSML, emotion controls, speech marks, and voice cloning, billed per character at a flat rate per plan: $10 per 1M characters on Starter, $8 on Pro, and $6 on Scale. Simba 3.2 serves a curated voice allow list, and cloned voices on it currently require manual Speechify approval of the voice key.
Sources: speechify.ai, docs.speechify.ai
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