Gemini Text-to-Speech vs iSpeech
Gemini Text-to-Speech
ai.google.deviSpeech
ispeech.orgSide by side
| Figure | Gemini Text-to-Speech | iSpeech |
|---|---|---|
| Price from | $0.25/mo | $0.25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 14 | 15 |
| Spec score · Text-to-speech tools | 8.8 (#23) | 9.2 (#11) |
| Spec score · Text-to-Speech Software | 8.6 (#39) | 9.2 (#6) |
| API access | Yes | API access requires an API key, with mobile development, mobile production, and web/general production key types. |
| Commercial use | Yes | Yes |
| Export formats | WAV,PCM | aiff,mp3,ogg,wma,flac,wav,alaw,ulaw,vox,mp4 |
| Free plan | Yes | Yes |
| Languages | The models automatically detect input language; Flash TTS supports over 130 languages and Flash-Lite supports over 100. | The homepage says the Speech API supports text-to-speech and speech recognition in more than 30 languages. |
| Platforms | web,api | web,ios,android,api |
| What it does | The Gemini API converts text into single-speaker or multi-speaker audio. | iSpeech provides cloud text-to-speech and automated speech-recognition services that turn text into audio or submitted audio into transcriptions. |
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
iSpeech
- Plus$2.95 a month
- Premium$3.95 a month
- Pay Per Use$50 a month
- Pay Per Install$0.25 a month
- BasicFree
- HackerFree
- Plus$2.95 a month
- Premium$3.95 a month
- Junior$29 a month
- Pay-per-use 2,000 credits$50, paid once
In their own words
Gemini Text-to-Speech
Gemini Text-to-Speech has no write-up on Specifiction yet; its figures are above.
iSpeech
iSpeech provides text-to-speech and automated speech recognition through APIs, SDKs, and online tools. Its speech API can synthesize audio with multiple voices, formats, bitrates, frequencies, and playback speeds, and supports MathML and SSML. The API can also transcribe submitted audio across multiple languages and recognition models; iSpeech says custom models can be created. The homepage lists support for more than 30 languages. Audio downloads are available in AIFF, MP3, OGG, WMA, FLAC, WAV, A-law, μ-law, VOX, and MP4 formats. Listed access includes Android, iOS, Linux, macOS, web, Windows, API, and extension. The Basic plan is free for personal use, and commercial use is listed as available. Plus costs $2.95 a month, billed monthly, and includes 30-minute recordings, approximately 4,167 words. Premium costs $3.95 a month, billed monthly, with 12-hour recordings, approximately 100,000 words. Pay Per Use costs $50 a month for dynamic TTS usage only and includes 2,000 credits. Pay Per Install costs $0.25 a month and has a 10,000-install minimum.