CereProc vs iSpeech
CereProc
app.cereproc.comiSpeech
ispeech.orgSide by side
| Figure | CereProc | iSpeech |
|---|---|---|
| Price from | £12.99/mo | $0.25/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 3 | 15 |
| Spec score · Text-to-Speech Software | 8.6 (#36) | 9.2 (#6) |
| Spec score · Text-to-speech tools | 8.6 (#45) | 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 | CereProc says it was established in 2005, is headquartered in Edinburgh, Scotland, and was acquired by Capacity in 2024. | iSpeech describes itself as a privately held company headquartered in Newark, New Jersey, with an office in San Francisco, California. |
| Free plan | No | Yes |
| Headquarters | Edinburgh, Scotland | The company lists Newark, New Jersey as headquarters and San Francisco as an additional office. |
| Platforms | web,windows,macos,linux,ios,android,api | web,ios,android,api |
| Product | CereProc provides text-to-speech technology for personal use, business applications, and assistive devices. | iSpeech provides text-to-speech and automated speech recognition services through APIs, SDKs, and online tools. |
| Support | The maker provides an FAQ, contact page, SDK documentation and sample code, and says SDK users can access dedicated developer support. | The developer pricing page lists priority technical support with purchases; the API guide directs support requests to [email protected]. |
Plans
CereProc
- CereVoice Cloud 1 Million Credit£12.99 a month
- CereVoice Cloud creditsPriced on request
- CereVoice SDK developer licensePrice not published
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
CereProc
CereProc provides text-to-speech technology for personal use, business applications, and assistive devices. Its voice library includes multilingual and accented voices with emotional synthesis. CereWave AI uses deep neural networks to generate speech and offers controls for language, gender, accent, and age. CereVoice Cloud converts text through a web interface or API using purchased credits; users can play, save, and download audio. The maker lists customer service, education, content creation, and assistive technology as Cloud applications. SDKs support Windows, macOS, Linux, Android, and iOS, with online and offline operation. The cServer supports MRCP v1/v2, Microsoft SAPI 5, and C, C++, and Python clients, and is listed for Windows and RPM-based Linux distributions. CerePlay is available for Android, iOS, iPadOS, and Apple M-series Macs. CereVoice Cloud's listed plan costs £12.99 a month for 1,000,000 characters. There is no free plan. Commercial SDK users are directed to sales, and Windows SAPI5 and macOS voices are being deprecated.
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.