iSpeech vs OpenAI Text-to-Speech
iSpeech
ispeech.org
OpenAI Text-to-Speech
developers.openai.comSide by side
| Figure | iSpeech | OpenAI Text-to-Speech |
|---|---|---|
| Price from | $0.25/mo | $0.60/mo |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 15 | 3 |
| Spec score · Text-to-Speech Software | 9.2 (#6) | 7.9 (#123) |
| Spec score · Text-to-speech tools | 9.2 (#11) | 8.3 (#74) |
| API access | API access requires an API key, with mobile development, mobile production, and web/general production key types. | Yes |
| Commercial use | Yes | Yes |
| Export formats | aiff,mp3,ogg,wma,flac,wav,alaw,ulaw,vox,mp4 | mp3,opus,aac,flac,wav,pcm |
| Languages | The homepage says the Speech API supports text-to-speech and speech recognition in more than 30 languages. | The TTS model can generate spoken audio in the languages listed in the guide by supplying text in the desired language. |
| Platforms | web,ios,android,api | api |
| Security | The privacy policy says iSpeech uses commercially reasonable physical, managerial, and technical safeguards, while stating it cannot warrant the security of transmitted information. | OpenAI says API Platform data is encrypted at rest with AES-256 and in transit with TLS 1.2 or higher, and that the API Platform is SOC 2 Type 2 audited. |
| What it does | iSpeech provides cloud text-to-speech and automated speech-recognition services that turn text into audio or submitted audio into transcriptions. | The GPT-4o Mini TTS model converts text into natural sounding spoken text through the speech generation API endpoint. |
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
OpenAI Text-to-Speech
- TTS-1$15 a month
- TTS-1 HD$30 a month
- GPT-4o Mini TTS API usage$0.60 a month
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.
OpenAI Text-to-Speech
OpenAI Text-to-Speech has no write-up on Specifiction yet; its figures are above.