Cepstral vs iSpeech
Cepstral
cepstral.comiSpeech
ispeech.orgSide by side
| Figure | Cepstral | iSpeech |
|---|---|---|
| Price from | — | $0.25/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 1 | 15 |
| Spec score · Text-to-Speech Software | 8.4 (#61) | 9.2 (#6) |
| Spec score · Text-to-speech tools | 8.0 (#102) | 9.2 (#11) |
| API access | Yes | API access requires an API key, with mobile development, mobile production, and web/general production key types. |
| Commercial use | Yes | Yes |
| Company | Cepstral says it develops natural-sounding synthetic voices for handheld, desktop, and server applications. | iSpeech describes itself as a privately held company headquartered in Newark, New Jersey, with an office in San Francisco, California. |
| Export formats | WAV | aiff,mp3,ogg,wma,flac,wav,alaw,ulaw,vox,mp4 |
| Free plan | No | Yes |
| Headquarters | Pittsburgh, Pennsylvania, USA | The company lists Newark, New Jersey as headquarters and San Francisco as an additional office. |
| Languages | Cepstral lists US English, Canadian French, Americas Spanish, UK English, German, and Italian voices. | The homepage says the Speech API supports text-to-speech and speech recognition in more than 30 languages. |
| Platforms | The personal product page lists Windows, Mac, and Linux voices; the download page offers personal voice and telephony installers. | web,ios,android,api |
| Product | Cepstral makes text-to-speech software that turns text into clear, natural-sounding speech. | iSpeech provides text-to-speech and automated speech recognition services through APIs, SDKs, and online tools. |
| Support | Cepstral provides product support information, tutorials, community forums, and a way to open a support ticket. | The developer pricing page lists priority technical support with purchases; the API guide directs support requests to [email protected]. |
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.