iSpeech vs SESTEK Text-to-Speech
iSpeech
ispeech.orgSESTEK Text-to-Speech
sestek.comSide by side
| Figure | iSpeech | SESTEK Text-to-Speech |
|---|---|---|
| Price from | $0.25/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 15 | 3 |
| Spec score · Text-to-Speech Software | 9.2 (#6) | 7.9 (#124) |
| Spec score · Text-to-speech tools | 9.2 (#11) | 8.1 (#90) |
| API access | API access requires an API key, with mobile development, mobile production, and web/general production key types. | Yes |
| Export formats | aiff,mp3,ogg,wma,flac,wav,alaw,ulaw,vox,mp4 | WAV,Opus,MP3,FLV |
| Headquarters | The company lists Newark, New Jersey as headquarters and San Francisco as an additional office. | Istanbul, Türkiye |
| Languages | The homepage says the Speech API supports text-to-speech and speech recognition in more than 30 languages. | The product supports more than 20 languages, with accent-specific voices including Gulf, Najdi, Kuwaiti, and Emirati Arabic, and American and British English. |
| Platforms | web,ios,android,api | Windows,Linux,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. | SESTEK states that it holds ISO 27001, ISO 9001, and SOC 2 Type 2 certifications and undergoes annual independent audits. |
| Support | The developer pricing page lists priority technical support with purchases; the API guide directs support requests to [email protected]. | The SESTEK site links to a customer support portal. |
| Voice controls | TTS requests support selectable voices, audio formats, bitrates, frequencies, playback speed, pitch, padding and bit depth. | Users can tune tone, pace, emphasis, and volume, and define custom pronunciations for abbreviations and specialized terms. |
| What it does | iSpeech provides cloud text-to-speech and automated speech-recognition services that turn text into audio or submitted audio into transcriptions. | SESTEK Text-to-Speech converts written content into clear, expressive, human-like speech. |
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
SESTEK Text-to-Speech
- Custom agreementPriced on request
- Pay-as-you-goPriced on request
- SubscriptionPriced on request
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.
SESTEK Text-to-Speech
SESTEK Text-to-Speech converts written text into speech for business applications. It supports more than 20 languages and offers accent-specific voices such as Gulf, Najdi, Kuwaiti, and Emirati Arabic, along with American and British English. Users can adjust tone, pace, emphasis, and volume, and define pronunciations for abbreviations, brand names, product codes, and specialized terms. Common SSML tags cover pauses, pronunciation, external audio, and voice switching. SESTEK can develop a voice model for an organization that is exclusive to it. Deployment is available on-premises or in the cloud, with the same feature set in either arrangement. Standard voices run on Windows, Linux, Docker Compose, and Kubernetes without a GPU; Premium voices require a GPU and run on Linux, Docker Compose, and Kubernetes. APIs and SDKs support integration with existing software. The platform also supports Azure and ElevenLabs integrations and can connect to SESTEK Speech Recognition, Virtual Translator, and AI Agents. Exports include WAV, Opus, MP3, and FLV. Licensing is available through pay-as-you-go, subscription, or custom agreement, but pricing is on request.