Gemini Text-to-Speech vs Voicebox
Gemini Text-to-Speech
ai.google.dev
Voicebox
voicebox.shSide by side
| Figure | Gemini Text-to-Speech | Voicebox |
|---|---|---|
| Price from | $0.25/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 |
| Plans published | 14 | 3 |
| Spec score · Text-to-speech tools | 8.8 (#23) | 9.4 (#2) |
| Spec score · Text-to-Speech Software | 8.6 (#39) | 8.7 (#32) |
| API access | Yes | Yes |
| Commercial use | Yes | Yes |
| Free plan | Yes | Yes |
| Languages | 78 | 23 |
| Use cases | The TTS API is intended for exact text recitation with fine-grained control, including podcast or audiobook generation. | The maker describes use for game dialogue, apps and agents, accessibility readouts, audiobooks, podcast intros, and scripts or tools. |
| What it does | The Gemini API converts text into single-speaker or multi-speaker audio. | Voicebox is a local AI voice studio for voice cloning, text-to-speech, dictation, transcription, and agent speech. |
Plans
Gemini Text-to-Speech
- Gemini 3.1 Flash TTS Preview Standard$1 a month
- Gemini 3.1 Flash TTS Preview Batch$0.50 a month
- Gemini 2.5 Flash Preview TTS Standard$0.50 a month
- Gemini 2.5 Flash Preview TTS Batch$0.25 a month
- Gemini 2.5 Pro Preview TTS Standard$1 a month
- Gemini 2.5 Pro Preview TTS Batch$0.50 a month
- Gemini 3.8 Flash-Lite TTS — BatchFree
- Gemini 3.8 Flash-Lite TTS — FlexFree
- Gemini 3.8 Flash-Lite TTS — PriorityFree
- Gemini 3.8 Flash-Lite TTS — StandardFree
In their own words
Gemini Text-to-Speech
Gemini Text-to-Speech has no write-up on Specifiction yet; its figures are above.
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.