15 Best Text To Speech API Solutions (Powerful and Reliable)

Transform text into lifelike speech with ease using one of the best text to speech API solutions on our list. Find the perfect one for your needs here!

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With the rise of digital content, finding the best text to speech API is crucial for businesses looking to enhance their online presence and accessibility. Text to speech technology has revolutionized the way we interact with content online, making it easier for users to engage with websites, applications, and more. Whether you're looking to improve accessibility, create engaging content, or simply experiment with the latest technology, the best text to speech API could be the key to unlocking a wealth of new possibilities. Let's explore the top options available and how they can benefit you.

Table of Contents

What Is Text To Speech?

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Text to Speech (TTS) API, also known as Speech Synthesis, is a technology that enables users to convert written text into spoken words. It processes text input and transforms it into audible speech output in different languages and accents.

Versatility in Applications

Text to Speech (TTS) API offers a wide range of applications in various fields. It is instrumental in personal assistants (like Siri or Alexa), navigation systems (GPS directions), e-learning platforms (audio textbooks), and accessibility tools for visually impaired individuals or those with reading difficulties.

How Does A Text To Speech API Work?

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I'll provide a brief overview of how a text-to-speech API works. When a program sends text to the API as a request, typically in JSON format, the API will receive the request, process it, and return the equivalent audio object. This audio object can then be integrated into the program that made the request and played for the user. The best text-to-speech APIs also allow the selection of accent and gender, as well as other options.

How Are Voices Created in a Text-to-Speech API?

I'll provide an overview of the process that goes into creating lifelike AI voices for text-to-speech APIs. Through text processing, voice generators phonetically and linguistically interpret written text. Linguistic modeling then shapes the voice's pronunciation, emphasis, and tone using linguistic rules.

Acoustic modeling morphs linguistic features into human speech patterns. Prosody modeling fine-tunes techniques such as pitch, inflection, and speed for naturalness. Waveform generation results in an acoustic pattern that produces a fluid audio waveform when working in concert, these models deliver coherent spoken outputs, making AI voice suitable for reminders, support, music, and more.

Use Cases For Text To Speech APIs

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Voice assistants like Siri, Alexa, and Google Assistant have become ubiquitous in our daily lives, seamlessly integrating with our devices and enabling us to perform various tasks using voice commands. These intelligent systems rely on text-to-speech APIs to convert text into spoken words, offering a more natural and interactive way for users to communicate with their devices.

By leveraging the capabilities of text-to-speech technology, voice assistants provide a hands-free experience for users, delivering information, answering questions, playing music, and even controlling smart home devices with simple voice commands, making them an indispensable tool in our increasingly connected world.

Business Applications: Enhancing Customer Service and Marketing Efforts

In the business world, text-to-speech technology offers a myriad of opportunities to streamline processes and improve customer interactions. For instance, companies can implement text-to-speech APIs to automate standard requests through voice assistance, freeing up customer service representatives to handle more complex issues.

Businesses can leverage text-to-speech technology for marketing efforts, such as creating social media voiceovers, voice advertising, and interactive voice response systems for personalized customer experiences. By integrating text-to-speech technology into their operations, businesses can enhance their efficiency, deliver personalized services, and reach a wider audience through innovative marketing campaigns.

Media Production: Revolutionizing Content Creation

Text-to-speech APIs are revolutionizing content creation in the media industry, empowering creators to produce high-quality audio content more efficiently. These APIs are used to generate voiceovers for podcasts, games, animations, and movies, providing an alternative to recording audio content from scratch.

Content creators can easily access a diverse range of voices, languages, and accents through these APIs, allowing them to customize their content to suit different audiences and media formats. By utilizing text-to-speech technology, media producers are breaking new ground in content creation, offering more flexibility, creativity, and cost-effective solutions for creating engaging audio content.

Education and E-Learning: Enabling Inclusive Learning Experiences

Text-to-speech technology plays a crucial role in enhancing educational experiences and making learning accessible to students with diverse needs. In educational settings and e-learning platforms, text-to-speech APIs are used to convert text-based content into spoken audio, providing an alternative way for students to engage with educational materials.

By offering audio versions of textbooks, articles, and other learning resources, text-to-speech technology supports students who may have visual impairments, reading difficulties, or learning disabilities. The use of text-to-speech technology in education promotes inclusivity, enabling all students to access educational content in a format that suits their individual learning preferences.

Accessibility: Breaking Down Barriers to Accessible Content

Text-to-speech technology plays a crucial role in breaking down barriers to accessible content, enabling individuals with visual impairments or reading difficulties to navigate digital platforms, websites, and online content through spoken audio. By leveraging text-to-speech APIs, developers can make their websites, applications, and digital forms more accessible, ensuring that all users can interact with their content effectively.

Text-to-speech technology offers a more inclusive browsing experience for individuals who rely on audio cues to navigate the digital landscape. By incorporating text-to-speech technology into their digital platforms, organizations can foster a more inclusive environment, ensuring that everyone has equal access to information and services online.

What Are The Most Important Features Of A Text To Speech API?

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Natural-sounding voices

The most important feature of a text to speech (TTS) API is providing a high-quality speech output that resonates naturally with listeners. Realistic, natural-sounding voices can enhance the user experience, making it more engaging and enjoyable. A TTS API that offers a wide range of voice variations, intonations, and pronunciations can make the content more lifelike and relatable, ultimately capturing the audience's attention effectively.

Language support

Another crucial feature is language support. A TTS API that offers multilingual capabilities can cater to diverse audiences and content needs. Whether you need support for commonly spoken languages or more niche dialects, having the ability to switch between languages seamlessly can enhance the accessibility and inclusivity of your content.

Offline functionality

Having offline functionality is a significant advantage for users who might need TTS assistance in remote or offline settings. This feature ensures that the API can still function without an internet connection, providing flexibility and convenience to users regardless of their connectivity status.

Customization options

Customization options allow users to tailor their TTS experience according to their preferences. Features like adjusting speech speed, pitch, and volume can make the output more personalized and engaging. Customization options can also help users with specific needs, such as those who require slower speech speeds or louder volumes for better comprehension.

Text input methods

The ability to support various text input methods is essential for a TTS API. Whether users want to convert web pages, documents, or typed text into speech, the API should be versatile enough to accommodate different sources of input. This flexibility ensures that users can access TTS services from a variety of platforms and mediums.

Realistic intonation and emotion

An ideal TTS API should be capable of mimicking the subtleties and nuances of human speech, including intonation and emotion. By infusing speech with realistic intonations and emotions, the API can create a more immersive and engaging listening experience for users.

Granular control over inflections and intonations

Providing granular control over inflections and intonations allows users to add infinite emotions to the voices without requiring new data. This level of control can enhance the expressiveness and richness of the speech output, making it more engaging and impactful.

Integration with other applications

Seamless integration with other applications is crucial for maximizing the utility of a TTS API. APIs that are easy to integrate with third-party applications allow users to leverage TTS services across different scenarios and platforms, enhancing the overall user experience and convenience.


Scalability is an essential feature for a TTS API, especially for applications that need to handle large volumes of requests. APIs that can provide fast response times even under heavy loads ensure a smooth and uninterrupted user experience, regardless of the demand on the system.

Security and privacy

Robust security measures are critical for protecting user data and ensuring privacy when using a TTS API. Adhering to stringent security protocols can help build trust with users and reassure them that their personal information is safe and protected.

15 Best Text To Speech API

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1. Unreal Speech

Unreal Speech is a cost-effective and scalable text-to-speech API that offers a range of natural-sounding AI voices. This API is known for its affordability and high quality, cutting costs by up to 90%. With fast and low-latency capabilities, Unreal Speech provides human-like voices with the option for per-word timestamps, making it an excellent choice for those looking for cheap, scalable, and realistic TTS.

2. Amazon Polly

Amazon Polly is a versatile TTS API that allows users to customize speech output and create personalized voices using lexicons and Speech Synthesis Markup Language. It supports multiple languages and offers the ability to adjust speaking style, speech rate, pitch, and loudness, catering to a wide range of voice customization needs.

3. Colossyan

Colossyan's API provides a Text-to-Speech converter with support for over 70 languages and various accents. Without the need for microphones or sound equipment, users can generate clear voice-overs. This API is perfect for creating natural-sounding audio content with crystal-clear quality.

4. Descript's TTS API - Overdub

Overdub by Descript utilizes Lyrebird AI to produce ultra-realistic voices that mimic human speech intonations and nuances. This state-of-the-art voice synthesis tool seamlessly blends with natural audio recordings, making it a top choice for users looking to create lifelike voiceovers.

5. Resemble AI's TTS

Resemble AI's TTS API allows users to add emotions to voices without requiring new data. Offering detailed control over inflections and intonations, this tool transforms voices into the desired target voice using real-time, realistic speech-to-speech technology.

6. WellSaid Labs' Text-to-Voice API

WellSaid Labs' Text-to-Voice API is a scalable tool for creating speech synthesis. It offers high-quality, natural-sounding voices that can be integrated with various programming languages and SDKs, making it a versatile choice for developers and businesses looking to add voice functionality to their products and services.

7. Google Cloud Text-to-Speech

Google Cloud Text-to-Speech converts written text into spoken words, supporting multiple languages and accents. With a variety of voices available, this API can be seamlessly integrated with different programming languages and SDKs, providing flexibility for a wide range of voice-related projects.

8. IBM Watson Text to Speech

IBM Watson Text to Speech offers a powerful TTS API with support for various languages and accents. With multiple voices to choose from, this tool can be easily integrated with different programming languages and SDKs, making it a versatile choice for developers and businesses looking to add voice functionality to their products.

9. Microsoft Azure Speech Service

Azure Speech Service provides Text-to-Speech capabilities for applications like voice assistants and navigation systems. This tool supports a variety of voice-related applications, making it a valuable asset for developers and businesses looking to incorporate voice functionality into their products and services.

10. Rev.ai

Rev.ai is a TTS API that supports multiple languages and accents. With the ability to convert written text into spoken words using various voices, it can be integrated with different programming languages and SDKs, offering flexibility for developers and businesses looking to incorporate voice capabilities into their products.

11. RoboMatic.ai

RoboMatic.ai offers a versatile TTS API that converts written text into spoken words in multiple languages and accents. With support for various voices, this tool can be easily integrated with different programming languages and SDKs, making it a flexible choice for adding voice functionality to products and services.

12. 15.ai

15.ai provides high-quality outputs that closely resemble real human voices, making it a top choice for users looking for AI-generated voices that sound natural. With support for various voice formats and transcription services, this API is a great tool for creating lifelike voice content.

13. Eden AI

Eden AI is a Text-to-Speech API that supports multiple languages and accents. With the ability to convert written text into spoken words using different voices, Eden AI can be integrated with various programming languages and SDKs, making it a versatile choice for developers and businesses looking to add voice functionality to their products and services.

14. Lovo.ai

Lovo.ai is an award-winning AI-based voice generator and text-to-speech platform that produces voices resembling real human speech. With a wide range of voices to choose from and compatibility with various programming languages and SDKs, Lovo.ai is a valuable tool for developers and businesses seeking high-quality voice synthesis capabilities.

15. Speechify

Speechify is a TTS API that converts written text into spoken words in multiple languages and accents. With support for various voices and the ability to integrate with various programming languages and SDKs, Speechify is a versatile tool for developers and businesses looking to add voice functionality to their products and services.

Choosing The Best Text To Speech API For Your Needs

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Text volume

Consider the amount of text you plan to convert into speech daily, weekly, or monthly. High-volume conversion requires a TTS API with scalable pricing options. Voice characteristics: Different projects may require specific voice characteristics like gender, accent, and language. Make sure the API offers these options. Intended application: Some TTS APIs are designed for certain applications. Choose one based on your project's goals and user expectations.

Natural-Sounding Voice

Choose a TTS API that offers a range of diverse voices, including male and female, different accents, emotions, and tones. This will help make the speech sound more natural and engaging. Having control over these characteristics is crucial for maintaining a high-quality user experience.

Language Support

Select a TTS API that supports multiple languages and can deliver text-to-speech in the user's local language. Multilingual support can help you reach a broader target audience and expand into new markets. Make sure the API offers language localization options for better user engagement.

Integration Capabilities

Check if the TTS API is compatible with your existing programming languages, frameworks, and platforms. Seamless integration ensures a smooth development process and easy deployment. Testing the API's compatibility with your system helps avoid integration issues later on.

Trial Options

Look for TTS APIs that offer free trials so you can test the product in real-world scenarios. Evaluate the performance, customization options, and industry-specific features before committing to a paid plan. Free trials help you make an informed decision based on your project's requirements.

Customer Support

Choose a TTS API provider that offers robust customer support to assist with integration, customization, and problem-solving. While API documentation and forums are helpful, having direct access to customer support can save time and resources. Look for a provider that prioritizes customer satisfaction.

Documentation and Resources

Select a TTS API with comprehensive documentation and resources to facilitate the development and integration process. Transparent documentation helps developers understand the API's functionalities, troubleshooting steps, and best practices. Access to valuable resources can streamline the implementation process.

Customization and Configuration

Opt for a TTS API that allows customization and configuration based on your project's specific requirements. Customization options should include voice modulation, pronunciation adjustments, and language settings. This flexibility enables you to create a unique audio experience that aligns with your brand identity.

Try Unreal Speech for Free Today — Affordably and Scalably Convert Text into Natural-Sounding Speech with Our Text-to-Speech API

Unreal Speech offers a low-cost, highly scalable text-to-speech API with natural-sounding AI voices, making it the cheapest and most high-quality solution in the market. We cut your text-to-speech costs by up to 90%, enabling you to get human-like AI voices with our super-fast/low-latency API.

This service also provides the option for per-word timestamps. With our simple and easy-to-use API, you can give your LLM a voice with ease and offer this functionality at scale. For those looking for cheap, scalable, and realistic TTS to incorporate into their products, trying our text-to-speech API for free can help convert text into natural-sounding speech at an affordable and scalable price.