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Speech Services pricing

Unified speech services for speech-to-text, text-to-speech and speech translation

The unified Speech services provide a wide range of speech recognition and generation capabilities including speech transcription, text-to-speech and speech translation. The Speech service provides a wide range of speech recognition and generation capabilities including speech transcription, text-to-speech, speech translation, and speaker recognition.

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Instance Category Features Price
Free - Web/Container
1 concurrent request1
Speech to Text Standard2 5 audio hours free per month
Custom 5 audio hours free per month
Endpoint hosting: 1 model free per month 3
Conversation Transcription Multichannel Audio PREVIEW 4 5 audio hours free per month
Text to Speech Standard 5 million characters free per month
Neural 0.5 million characters free per month
Custom 5 million characters free per month
Endpoint hosting: 1 model free per month
Speech Translation Standard 5 audio hours free per month
Speaker Recognition 8 Speaker Verification 10,000 transactions free per month
Speaker Identification 10,000 transactions free per month
Voice Storage 10,000 transactions free per month
Standard - Web/Container
100 concurrent requests for Base model
20 concurrent requests for Custom model1
Speech to Text Standard2 $- per audio hour
Custom $- per audio hour
Endpoint hosting: $- per model per hour 9
Conversation Transcription Multichannel Audio PREVIEW 4 $- per audio hour 5
Text to Speech Standard $- per 1M characters
Neural $- per 1M characters 6
Long audio creation: $- per 1M characters
Custom $- per 1M characters
Endpoint hosting: $- per model per hour
Custom Neural 7 Training: $- per compute hour, up to $- per training
Real-time synthesis: $- per 1M characters
Endpoint hosting: $- per model per hour
Long audio creation: $- per 1M characters
Speech Translation Standard $- per audio hour
Speaker Recognition 8 Speaker Verification $- per 1,000 transactions
Speaker Identification $- per 1,000 transactions
Voice Storage $- per 1,000 voice profiles (10,000 free voice profiles per month)

See the documentation for additional detailed information on quotas and limits for all pricing tiers.

1To increase concurrent requests, please see instructions.

2Speech to Text will now include pronunciation assessment for both the Free instance (e.g. 5 audio hours free per month) as well as the Standard instance, which will follow Standard pricing of $1 per audio hour.

3Unused models will be automatically decommissioned after 7 days.

4Conversation Transcription Multichannel recommends a circular microphone array device. For more details you can refer to Microsoft Speech Device SDK.

5This reflects public preview pricing. GA price will be announced later at GA.

6Check the neural documentation for the regions where Neural Text to Speech is available.

7The Custom Neural Voice capability is a limited access feature. Learn more about the limited access process.

8Speaker Recognition is currently only available in West US. Please select "West US" as the Region to see pricing for Speaker Recognition.

9Custom voice will be deprecated on Feb 29, 2024. We now offer an improved offering in Custom Neural Voice. Migrate to custom neural voice.

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Additional resources

Speech Services details

Learn more about Speech Services features and capabilities.

Pricing calculator

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Documentation

Review technical tutorials, videos, and more Speech Services resources.

Frequently asked questions

    • For Speech Translation, Speech to Text, and Speech to Text with Custom Speech Model: usage is billed in one-second increments.
    • For Text to Speech with Neural or Custom Neural Voices: usage is billed per character. Check the definition of character in the pricing note.
    • For Custom Speech Model Hosting: usage is billed hourly; For Custom Voice Font Hosting: usage is billed daily.
    • For Custom Commands: billing is tracked as consumption of Speech to Text, Text to Speech, and Language Understanding. Custom Commands does not introduce new billing meters.
    • There is no charge for training Speech models. The only costs are hosting the model once trained, and then the cost per hour of speech transcription.
  • The Speech service enables users to adapt baseline models based on their own acoustic and language data, leading to custom speech models that can be used against both Speech to Text and Speech Translation.

  • The language model is a probability distribution over sequences of words. The language model helps the system decide among sequences of words that sound similar, based on the likelihood of the word sequences themselves. For example, “recognize speech” and “wreck a nice beach” sound alike but the first hypothesis is far more likely to occur, and therefore will be assigned a higher score by the language model. If you expect voice queries to your application to contain particular vocabulary items, such as product names or jargon that rarely occur in typical speech, it is likely that you can obtain improved performance by customizing the language model. For example, if you were building an app to search MSDN by voice, it’s likely that terms like “object-oriented” or “namespace” or “dot net” will appear more frequently than in typical voice applications. Customizing the language model will enable the system to learn this.

  • The acoustic model is a classifier that labels short fragments of audio into one of several phonemes, or sound units, in each language. These phonemes can then be stitched together to form words. For example, the word “speech” is comprised of four phonemes “s p iy ch”. These classifications are made on the order of 100 times per second. Customizing the acoustic model can enable the system to learn to do a better job recognizing speech in atypical environments. For example, if you have an app designed to be used by workers in a warehouse or factory, a customized acoustic model can more accurately recognize speech in the presence of the noises found in these environments.

  • Speech service offers a wide range of text-to-speech (TTS) voice fonts, however custom neural voice allows you to build your own custom voice that suits your needs and your brand. Read the blog for more information.

  • There are scenarios in which a speaker or multiple speakers may speak multiple languages over the same audio file or live presentation. Continuous language detection allows you to identify a switch in spoken language and accurately transcribe speech accordingly. This feature will be free for private preview and can be accessed via the Speech SDK. Visit docs to learn more.

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