BitFractal Transcriber Speech to Text (STT) API

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AI powered Speech to Text (STT) API for audio transcription and captioning integrated with your apps

BitFractal Speech to Text (STT) API helps professionals, across Media & Telco, Education, Professional Services, Travel, and other industries, create engaging content and experiences, creating captions and transcriptions from a variety of languages and dialects, producing high-quality results for a fraction of the cost and time of using human-base transcription. The generated content can then be used within your CRM, IVRs, Apps, and more.

  • Designed to be easy to use and integrate. Just one API call and that's it, your audio clip is transcribed.
  • Supports to over 140 languages.
  • Supports a variety of audio formats as input, including WAV, MP3, OGG, OPUS, and WEBM in many different bit and sample rates.
  • Generate accurate transcriptions along with vtt (time offset and duration of each sentence) output to easily use them as captions.
  • Included profanity filter to handle unwanted scenarios.
  • Add your specific business terms as parameters to improve recognition.
  • Available in data centers in the US, Europe, and Brazil. Other datacenters can be added upon requests to
  • Can be used along with Power Automate, Azure Logic Apps, Zapier and other orchestrators to easily connect to different system in a low-code format.
  • This is a 100% SaaS offering, NO Azure subscription needed. Upon subscribing you'll receive an email with your access keys and detailed documentation with sample codes in multiple languages to start using it right away

Check our APIs documentation here and see how easy it is to take your solutions to the next level.

Using Microsoft Azure Cognitive Services, combining Speech and Text services, BitFractal STT API is a standalone, purpose-built programming interface to create rich transcriptions from a variety of different languages and speaking styles.

If you also need advanced Text to Speech capability, check our TTS API here: BitFractal TTS API on AppSource

For a full app experience, inside Microsoft Teams, M365, or Outlook, also add the BitFractal Studio (free trials of BitFractal Studio available in the app) to your subscription.

And if you need an end-to-end solution, combining Text to Speech + OpenAI Chat GPT + Speech to Text, all in on single and easy-to-use API call, make sure you try our most advanced solution: Conversational AI API for IVRs, SMS, and WhatsApp.

BitFractal removes the complexity of advanced AI technologies, by infusing them into productivity tools in a way that becomes natural for business users to benefit from them without having to worry about the ins and outs of the underlying technology stack. It just works and that’s what matters for users.

After you subscribe, make sure you keep an eye out for an email from with your access code and link to activate your subscription.