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    What Are The Top Ten Speech Recognition APIs

    What Are The Top Ten Speech Recognition APIs

    What are Speech Recognition APIs?

    Speech Recognition APIs are a set of computer programs. It aims to record, interpret, and convert human speech input to text. The API breaks the audio to take out results. It breaks a voice recording into individual tones and then analyzes each tone. It does this by using algorithms to find the word that is most likely to match that language. The API then converts those tones to text.

    Speech Recognition API uses Natural Language Processing (NLP) and deep neural learning networks. NLP is also a method by which computers analyze and understand the meaning of human language. Doing so, it can interpret and convert into a digital format and analyze the content.

    Now the API can make decisions based on programming and language patterns. It makes assumptions about what the user is actually saying. After determining the conversation, it transcribes the conversation into text.

    It sounds simple but in reality, it is quite difficult. The advances in technology make these diverse and complicated processes lightning fast.

    Top 10 Speech Recognition APIs

    Google Speech API

    The Google Speech API, also known as Cloud SpeechtoText. It is a tool that uses Google's ML technology to convert speech to text. The Google Speech API also gives developers access to NLP technology. Moreover, this NLP tech underpins Google products such as Search and Inbox.

    API Features:

    • The Cloud SpeechtoText API lets you convert audio to text with great precision. The API also enables you to do voice searches. You can create voice commands like: What time is it now?
    • It also processes spoken language in real-time or from the audio stored in a file.
    • Google Speech API can recognize over 100 languages with global variations. It also automatically recognizes the language. This helps developers in improving the capabilities of their applications. It also enables them to create intelligent systems that recognize speech data.
    • Google provides extensive documentation. Moreover, it comes with many code examples to use the API. It also has a developer community that helps with any integration challenge.

    IBM Watson API

    The IBM Watson Speech to Text API translates audio into written text. This also helps users to integrate precise speech recognition functions into their work environment. IBM Watson Speech to Text API is an adapting and strong service.

    API Features:

    It automatically converts audio in real-time and can create voice-activated applications. It allows the user to customize the speech recognition model to suit their language/content preferences. Moreover, the API can also be used for a variety of use cases, such as:

    • For transcribing audio from a microphone
    • Transcribing call center recordings, or
    • Analyzing audio recordings based on keywords.
    • The IBM Watson API supports seven languages.
    • IBM offers a wide variety of resources, documentation, and SDKs. These help you to get started. An active community of developers can also help you to get the most out of the API.

    This is a simple API. It allows users to add noise cancellation and speech classification features into their applications.

    API Features:

    • SpeechAPI has functions to process speech from files. The API can also detect and remove noise from a speech stream without affecting the speech. The API can also suppress noise from a variety of sources. Also, SpeechAPI enables access to speech segments in an audio file. Moreover, it allows users to classify them according to various characteristics like mood, the language of the speaker, age, and gender.
    • The API supports a limited number of languages.
    • The API is offered free of charge.
    • It has simple and easy-to-understand documentation. It can be used to embed the API with little programming effort.
    Speech-to-Text API

    The Speech-to-Text API is a basic API. It allows the user to convert audio input into written text.

    API Features:

    • Machine-learning technology is applied in the API. This helps the users to transcribe audio input with accuracy. It can also convert both short and long audio files.
    • Speech-to-Text API only supports the English language. Also, it can detect accents for easier conversion with minimal deviation.
    • The API is easy to use. It has simple documentation that enables users to get started implementing it.
    TexttoSpeech API

    The Voice RSS API TexttoSpeech is a basic API. It basically converts text input into speech.

    API Features:

    • There is a speech synthesis system provided by the API. It helps to convert the text in normal speech into human speech. With a few lines of code, you can connect to the API and allow your application to serve audio.
    • TexttoSpeech API offers a wide range of human voices. It also supports 26 languages.
    • Complete documentation is also provided in various programming languages. This also helps to integrate the API on any platform.
    Rev. AI API

    The Rev. AI API enables developers to access a robust speech recognition system. They can also create voice text functions in their applications. Moreover, this API makes it easy for different user levels.

    The features of this API allow the software to adapt to user-specific language styles/patterns. It also offers more custom vocabulary options than Google.

    API Features:

    • Enhanced data security through speech recognition algorithms
    • Real-time transcription
    • Real-time translation
    • Customizable vocabulary
    • Texttopeech functions for natural language patterns
    Wit API

    Wit API offers NLP and language interface functions. These functions can also be used to create applications to interpret user language.

    API Features:

    • The API allows users to incorporate an NLP interface into the application. Moreover, it enables the users to speak to express their intentions. It eliminates following complicated steps or clicking many buttons.
    • The API supports a limited number of languages.
    • Provided free of charge.
    • Wit has a huge list of documentations. It also has easy-to-understand tutorials, and code samples on how to use the API. Moreover, the audio data provided as input need not be of very high quality.
    ReadSpeaker API

    The ReadSpeaker SpeechCloud API is a web-based API. It lets users convert text to speech. It also improves the versatility of software and devices.

    API Features:

    • The API has data of good-quality male and female vocals. These voices can read audio files from written texts. It also comes with various parameters that give you full control over the generated audio.
    • The ReadSpeaker API supports approx. 20 languages and variants from all over the world.
    • The API has simple documentation. It also has sample code in various programming languages. This helps to install text-to-audio conversion functions.
    Speech2Topics API

    The Yactraq Speech2Topics API is an analytics service. It also uses machine learning technology for improved visibility of the audio data.

    API Features:

    • Speech2Topics API reads topic metadata from various vocal mediums. This data can be voice calling data, texting data, audio/video content.
    • It also provides vital information to make business intelligence decisions. The metadata can be used to create targeted ads. You can also create UX features to improve user interaction and pull up relevant videos.
    • The Speech2Topics API also supports a limited number of languages.
    • Yactraq provides API documentation and online customer support. This also helps users to get started with the API to discover the potential of audible data.
    Microsoft Cognitive Services

    Microsoft is also a major player in the world of speech recognition APIs. It is more than a speech recognition API. It also offers security options for developers for the most secure data for applications.

    The main thing that sets it apart is the speaker recognition feature. This is the audio version of face recognition. Moreover, it is easy to use for different levels of users.

    API Features:

    • Improved data security through speech recognition algorithms
    • Real-time transcription
    • Real-time translation
    • Adaptable vocabulary
    • Text-to-speech functions for natural language patterns


    Not all VoiceToText APIs are the same. A speech recognition API is more of a tool kit rather than a product. Everyone has different strengths and weaknesses. it depends on what you are going to use it for.

    With the advent of smart devices, virtual assistants, and artificial intelligence, voice integration is going to stay. It will also become more important in the coming years as technology continues to penetrate our daily lives.

    You may also like to read:
    What is Natural Language Processing API: Top Ten APIs
    Conversational Analytics & Natural Language Processing & Their Effects

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