Sprag

Name: Sprag
Price: 0.7 USD

Paid APISelf-hostedWeb

What Sprag is

Sprag provides speech-to-speech agents and a speech recognition, language-model, and speech synthesis pipeline through one API. Its Rhythm service transcribes audio in 30 languages for streaming or batch use. Chorus generates speech using built-in, cloned, or designed voices, while Symphony supports realtime tool calling, interruptions, and turn-taking. Symphony Notes describes clips, including speech, speakers, emotion, and background sound. The service is available on the web, through an API, and with a self-hosted deployment option. Its OpenAI-shaped HTTP API lets existing clients connect by changing the base URL and API key. Sprag documents Pipecat integration and lists LiveKit in its integrations navigation. Audio export formats include MP3, Opus, AAC, FLAC, WAV, and PCM. There is no free plan. Chorus costs $0.70 a month, billed at $0.70 per hour of speech generated; Chorus Design costs $15 a month, and Chorus Clone costs $4.50 a month plus $1.00 per hour of input audio. Realtime Rhythm and Symphony sessions cost 25% above batch rates; speech output costs the same either way.

Who it suits

Sprag is aimed at developers aged 16 and older who need speech generation, transcription, or realtime voice agents through an API. Its web and self-hosted options may suit teams with different deployment preferences.

What it does well

One API covers speech models and agents.
Rhythm supports streaming and batch transcription.
Chorus offers built-in, cloned, and designed voices.
Supports six audio export formats.
Self-hosted deployment is offered.

What to know first

There is no free plan.
Realtime Rhythm and Symphony sessions cost 25% above batch rates.
Chorus Clone adds an input-audio charge.

Limits

There is no free plan. Chorus Clone adds $1.00 per hour of input audio, and realtime Rhythm and Symphony sessions are billed at 25% above batch rates; speech output costs the same either way.

Plans

Plan	Billed and limits	Price
Chorus	$0.70 per hour of speech generated; also listed as $19.44 per 1M audio tokens · Stock-voice text-to-speech	$0.70 a month
Chorus Design	Designs new voices from a text prompt	$15 a month
Chorus Clone	Plus $1.00 per hour of input audio · Clones a voice from a short reference	$4.50 a month
Symphony Notes	$0.0019/ minute · Audio captioning · + $2.03 per 1M output tokens	Free
Rhythm	$0.075/ hour of audio submitted; batch rate · Streaming and batch · realtime sessions cost 25% over batch rates	$0.08, paid once
Symphony	$0.09/ hour of audio; batch rate · Text, image, audio, and video in · text and speech out · tool calling · realtime sessions cost 25% over batch rates	$0.09, paid once
Chorus — built-in voice	$0.70/ hour of speech generated · Built-in voices · $19.44 per 1M audio tokens	$0.70, paid once
Chorus — designed voice	$15.00/ 1M characters · Voice design	$15, paid once

The first 8 of 9 plans, as sprag.ai lists them, read 20 Sept 2026. The maker's own page has the final word. Every plan

Getting started

Visit https://sprag.ai/.
Choose web, API, or the linked self-hosted deployment option.
For API use, connect an existing client by changing its base URL and API key.
Select a listed plan for the speech capability you need.
Contact Sprag about account costs, billing, rate limits, enterprise agreements, or metering.

Verdict

Sprag brings transcription, speech generation, captioning, and realtime agents into one API offering. It has no free plan, and realtime session pricing differs from batch rates for Rhythm and Symphony.

Questions

Is Sprag free?

No free plan is listed. Chorus is listed at $0.70 per month, billed at $0.70 per hour of speech generated.

Which platforms does Sprag support?

Sprag lists web, API, and self-hosted access.

Can I use voice cloning?

Yes. Chorus Clone is listed at $4.50 per month, plus $1.00 per hour of input audio.

What does Symphony do?

Symphony supports realtime tool calling, interruptions, and turn-taking. Its realtime sessions cost 25% above batch rates.

Does Sprag integrate with other services?

Sprag documents a Pipecat integration using its OpenAI services and lists LiveKit in its integrations navigation.

How can I ask about enterprise use?

The pricing page says users can contact Sprag for an organization account for enterprise use.

Facts from Sprag's own pages

API access: Yes · sprag.ai, 20 Sept 2026
API compatibility: Sprag serves speech models through an OpenAI-shaped HTTP API, and existing clients can point to it by changing the base URL and API key. · sprag.ai, 7 Oct 2026
Audience: Sprag says its products and services are intended for developers aged 16 and older. · sprag.ai, 7 Oct 2026
Captioning: Symphony Notes describes audio clips, including speech, speakers, emotion, and background sound. · sprag.ai, 7 Oct 2026
Enterprise: The pricing page says users can contact Sprag for an organization account for enterprise use. · sprag.ai, 7 Oct 2026
Export formats: mp3,opus,aac,flac,wav,pcm · sprag.ai, 20 Sept 2026
Free plan: No · sprag.ai, 20 Sept 2026
Integrations: Sprag documents integration with Pipecat using its OpenAI services and lists LiveKit in its integrations navigation. · sprag.ai, 7 Oct 2026
Languages: 10 · sprag.ai, 20 Sept 2026
Limit: The pricing page says realtime sessions bill at 25% above batch rates for Rhythm and Symphony, while speech output costs the same either way. · sprag.ai, 7 Oct 2026
Platforms: web,api · sprag.ai, 20 Sept 2026
Privacy and security: Sprag says data is stored in its cloud infrastructure, transfers use HTTPS/TLS, and payment card details are processed by Stripe rather than stored on its systems. · sprag.ai, 7 Oct 2026
Privacy controls: Sprag says it does not sell personal information and provides California residents an opt-out for advertising-measurement cookies that may constitute sharing. · sprag.ai, 7 Oct 2026
Product: Sprag offers native speech-to-speech agents and an STT-to-LLM-to-TTS voice pipeline through one API. · sprag.ai, 7 Oct 2026
Realtime agents: Symphony supports realtime tool calling and natural interruptions and turn-taking. · sprag.ai, 7 Oct 2026
Self-hosting: The homepage links to a self-hosted deployment option. · sprag.ai, 7 Oct 2026
Speech recognition: Rhythm transcribes audio in 30 languages and supports streaming and batch use. · sprag.ai, 7 Oct 2026
Speech synthesis: Chorus synthesizes speech using a built-in, cloned, or designed voice. · sprag.ai, 7 Oct 2026
Support: The pricing page directs users with questions about account costs, billing, rate limits, enterprise agreements, and metering to contact Sprag. · sprag.ai, 7 Oct 2026
Voice cloning: Yes · sprag.ai, 20 Sept 2026