Sprag vs Voicebox
Sprag
sprag.ai
Voicebox
voicebox.shSide by side
| Figure | Sprag | Voicebox |
|---|---|---|
| Price from | $0.70/mo | $1/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 9 | 3 |
| Spec score · Text-to-speech tools | 8.6 (#52) | 9.4 (#2) |
| Spec score · Text-to-Speech Software | 8.4 (#75) | 8.7 (#32) |
| Spec score · Voice Cloning Software | 8.3 (#12) | 8.8 (#7) |
| Spec score · AI voice cloning tools | 8.3 (#21) | 8.7 (#12) |
| API access | Yes | Yes |
| Free plan | No | Yes |
| Languages | 10 | 23 |
| Product | Sprag offers native speech-to-speech agents and an STT-to-LLM-to-TTS voice pipeline through one API. | Voicebox is a free, open-source local AI voice studio for voice cloning, speech generation, dictation, and agent voice output. |
| Self-hosting | The homepage links to a self-hosted deployment option. | The backend can run locally or on a separate Docker or bare-host machine for remote-mode connections. |
| Voice cloning | Yes | It can clone a voice from a few seconds of audio supplied by upload, microphone recording, or system-audio capture. |
Plans
Sprag
- Chorus$0.70 a month
- Chorus Design$15 a month
- Chorus Clone$4.50 a month
- Symphony NotesFree
- Rhythm$0.08, paid once
- Symphony$0.09, paid once
- Chorus — built-in voice$0.70, paid once
- Chorus — cloned voice$4.50, paid once
- Chorus — designed voice$15, paid once
In their own words
Voicebox
Voicebox is a free, open-source local AI voice studio for voice cloning, speech generation, dictation, and agent voice output. Its desktop app can clone a voice from as little as three seconds of audio, supplied by file, microphone recording, or system capture. The maker lists seven text-to-speech engines for cloning, preset voices, and delivery control. A timeline editor supports multi-voice narratives, arranging tracks, trimming clips, and mixing conversations; effects include pitch shift, reverb, delay, and compression. Dictation uses a global shortcut to send transcripts to the focused text field or clipboard, with local Whisper models supporting 99 languages. MCP-aware agents such as Claude Code, Cursor, and Cline can speak through Voicebox, and a local REST API provides speech generation and related functions. The privacy policy says the offline desktop app requires no account and does not send recordings, profiles, transcripts, generations, or settings to the maker. Local is free with unlimited local generations and captures. Cloud and mobile sync are marked as coming soon, and cloud pricing and limits are not final.