Spex-TTS
The facts below are what the maker publishes about Spex-TTS, checked and dated. Our editors have not written about it yet.
Plans and prices
From Spex-TTS's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 50,000 tokens to start |
| Take a Gandr | $10 a month | 1 million tokens a month · Resets monthly |
| Pro | $50 a month | 5 million tokens a month · Resets monthly |
| Scale / flat rate | $150 | One unlimited stream · Unmetered · $150 per stream, per month, on annual; $180 month-to-month |
| Enterprise | Priced on request | 500 lines and up · Volume, burst and failover · Priced together |
The facts
Each one read from Spex-TTS's own pages, with the date it was checked.
What it does
- Accuracy
- The maker reports a 1.98% word error rate against a 2.17% human reference using the same scorer.checked 9 Oct 2026
- API access
- Yeschecked 20 Sep 2026
- API limits
- The maker says there is no voice-management API; a voice reference is sent in the request, and the API example uses a ten-second recording.checked 9 Oct 2026
- Consent limit
- The maker requires users to have the reference speaker’s consent but says consent is not detected by the service.checked 9 Oct 2026
- Export formats
- ["WAV","raw PCM (pcm_s16le)"]checked 20 Sep 2026
- Expression controls
- Numeric controls and inline transcript tags can steer speech expression, including timed breaks and spelled-out text.checked 9 Oct 2026
- Integrations
- The maker documents API access through REST, server-sent events, and WebSocket; no named third-party integrations are listed on the opened API page.checked 9 Oct 2026
- Languages
- The maker says one cloned reference can be used across 23 languages.checked 9 Oct 2026
- Paid from
- 10checked 20 Sep 2026
- Performance
- The maker reports first audio byte in 146 ms over the open internet and 116 ms p50 when the server is warm.checked 9 Oct 2026
- Privacy
- Customer text and reference audio never enter a training set, according to the maker.checked 9 Oct 2026
- Purpose
- Spex-TTS is a text-to-speech engine that grew out of a production live-translation product.checked 9 Oct 2026
- Security claims
- The maker’s site lists SOC 2 Type 2 infrastructure, HIPAA-Verified infrastructure, and GDPR-Ready infrastructure.checked 9 Oct 2026
- Streaming
- The API offers complete WAV responses, HTTP server-sent event streams, and WebSocket audio streams.checked 9 Oct 2026
- Synthetic audio marking
- Every generated sample carries an inaudible watermark that the maker says survives transcoding and cannot be skipped by configuration.checked 9 Oct 2026
- Usage tracking
- Usage is auditable per API key through GET /v1/usage.checked 9 Oct 2026
- Voice cloning
- The API supports instant voice cloning from ten seconds of a consenting speaker’s audio, and the clone speaks 23 languages.checked 9 Oct 2026
Money
- Free plan
- Yeschecked 20 Sep 2026
Where it runs
- Platforms
- ["web","api"]checked 20 Sep 2026
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