iSpeech vs Spark-TTS
iSpeech
ispeech.orgSpark-TTS
sparkaudio.github.ioSide by side
| Figure | iSpeech | Spark-TTS |
|---|---|---|
| Price from | $0.25/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 15 | 1 |
| Spec score · Text-to-Speech Software | 9.2 (#6) | 7.8 (#136) |
| Spec score · Text-to-speech tools | 9.2 (#11) | 7.9 (#124) |
| Commercial use | Yes | No |
| Free plan | Yes | Yes |
| Languages | The homepage says the Speech API supports text-to-speech and speech recognition in more than 30 languages. | It supports Chinese and English, including cross-lingual and code-switching voice cloning. |
| Platforms | web,ios,android,api | web,windows,linux |
| Voice controls | TTS requests support selectable voices, audio formats, bitrates, frequencies, playback speed, pitch, padding and bit depth. | Speech generation can be controlled through speaker gender, pitch, and speaking rate. |
Plans
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
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.
Spark-TTS
Spark-TTS has no write-up on Specifiction yet; its figures are above.