Streamline Your Business With the Best Voice API for Enterprise Improve your customer experiences by adding one of these top voice APIs for Enterprises.

By Hammad Syed in Agents

May 17, 2024 12 min read
Streamline Your Business With the Best Voice API for Enterprise

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When you’re running a business, every detail counts, especially how you communicate. 

Voice APIs have become a cornerstone of enterprise communication, offering more than just a way to make phone calls; they enable interactive, real-time connections that can transform how you engage with customers and streamline operations. 

During this guide, I’ll walk you through what to look for in a voice API and introduce you to some of the best voice API for Enterprises available today, ensuring you choose a solution that matches your business needs.

What is a Voice API and Why is it Crucial for Your Business?

A voice API (Application Programming Interface) lets your applications start, receive, and manage voice calls over the internet. This tool is a type of communication API, which includes SMS, video calling, and chat apps too. 

With a voice API, you can add voice features right into your existing systems, like customer support platforms, mobile apps, or websites.

Why is this important? Think about how simple and quick it is to make a customer support call directly from an app. The customer just presses a button and they’re connected, no need to dial a phone number. 

Or imagine sending voice messages as easily as you send text messages. A good voice API makes the user experience better, helps your team work more smoothly, and cuts down on costs. 

Using technology like WebRTC, you can set up real-time, clear voice applications that work just like making a regular phone call, but over the internet. 

This technology is key in updating how businesses connect with customers, mixing convenience with efficiency in ways old phone systems just can’t.

Key Features to Consider in a Voice API

When you’re picking a voice API, you need to think about several important features to make sure it fits what your business needs:


Your chosen voice API must be able to grow with your business. This means if you add more users, handle more calls at once, or start selling in new markets, the API should be able to handle it without any drop in call quality. 

This is crucial for businesses planning to grow and needing technology that can keep up.

Low Latency

In making voice calls, how fast the call connects is really important. If there’s a delay, it can make the call echo or sound slow. A good voice API will have low latency, which makes the conversation happen in real time and feel more natural. 

This is especially important for things like doctor’s appointments over the phone, customer service, or online meetings.

High Uptime

Reliability is key. The voice API you pick should be very reliable, usually guaranteed by a strong Service Level Agreement (SLA). 

This means the service should always be up and running, which keeps your business communications smooth and without interruptions.


It’s important to get good value for what you pay. The best voice API should offer fair prices without missing any key features. It should have a clear pricing plan that grows with your usage, letting you plan your budget better. 

Good pricing also means that the savings from using the API should be more than what you used to pay for traditional phone services.

Advanced Communication Features

Search for APIs that have advanced features like speech recognition, text-to-speech, interactive voice response (IVR), and SIP trunking. These features not only make your voice applications better but also help automate many tasks in your call center. 

For example, IVR systems can take care of basic customer questions on their own, directing people to the right department without needing a person to answer the call.

Also, check if the API works well with your current platforms using a REST API. This helps it connect easily with other tools and systems you use, which is essential for a smooth-running communication setup.

Top 5 Voice APIs for Enterprises

Let’s look at some of the best voice APIs for enterprises out there, which are great for large businesses needing reliable and feature-rich voice communication.

1. PlayAI

PlayAI is known for its advanced machine learning algorithms and robust voice processing capabilities. Our team at PlayAI provides high-quality voice communication features suitable for different enterprise needs. PlayAI’s API supports real-time voice recognition and synthesis, making it an excellent choice for businesses looking to enhance their customer interaction and engagement.


  • Advanced voice recognition and synthesis
  • Real-time processing capabilities
  • Flexible integration options
  • Strong support for multiple languages


  • Can be slightly more pricey for small businesses
  • Requires some technical expertise for setup and customization

2. MirrorFly

MirrorFly really shines with its customizable communication platform, which is perfect if your business needs special solutions. Its voice API delivers clear audio calls without delay. 

One of the best things about MirrorFly is its wide range of features, including the ability to record calls, overlay voices, and host conferences. It’s built to fit right into your apps, which helps make your communication methods more streamlined and effective.


  • Over 150 chat and calling features
  • High-quality voice and video calls
  • Supports various devices and platforms globally
  • Robust integration with CRM systems


  • No free version available
  • Initial setup can be complex

3. Apphitect

Then there’s Apphitect, which steps up the game with its AI-powered voice API. This is a big deal if you want to get more from your voice data, thanks to tools like instant transcription and voice recognition. 

Apphitect also allows for interactive voice calls, making conversations more engaging. This can really improve how happy and engaged your customers feel.


  • Easy integration with 24/7 customer support
  • Scalable and trustworthy solution
  • Offers unlimited storage options and cloud hosting
  • Rich customizable UI/UX designs


  • Limited to enterprise business purposes
  • One-time license cost can be high

4. Twilio

Twilio is a well-known name in the world of API providers. Its Programmable Voice API lets you handle calls with ease, thanks to a strong set of tools and support. 

Twilio is known for being reliable and able to handle growth, with plenty of help available to get you started. Whether you’re running a worldwide contact center or need a solid system for voice and SMS alerts, Twilio is equipped to handle it all.


  • Comprehensive toolset for voice and SMS
  • High scalability and reliability
  • Extensive documentation and support
  • Flexibility with REST API


  • Expensive compared to some competitors
  • Requires technical skills for setup and operation

5. Sendbird

Sendbird is ideal if keeping your users engaged is your main goal. It specializes in real-time communications and its voice API works perfectly with its chat and video services. 

This makes it an excellent choice for building complete communication platforms. With user-friendly options like voice chat and conferencing, Sendbird helps make sure your customer service is as interactive and effective as possible.


  • Intuitive user interface
  • Highly reliable and secure
  • Multi-device support
  • On-device call recording


  • Limited advanced features compared to others
  • Customer support can be slow at times

6. Plivo

If you’re trying to keep communication costs down without losing quality, Plivo has a lot to offer. Its voice APIs reach worldwide and are supported by a strong promise of constant availability and dependability. 

Plivo includes all the essential features, such as call recording, advanced call routing, and SIP trunking, all within a solution that’s affordable and easy to scale up as your business grows.


  • Cost-effective solution for global communication
  • High reliability and uptime
  • Comprehensive call management features
  • Easy to scale as business grows


  • Limited customization options
  • Initial integration can be complex

How to Choose the Right Voice API for Your Enterprise

Choosing the best voice API for your business means finding a solution that fits well with what you need operationally, what you can handle technically, and what you can afford. 

I’ve gone through this process myself and know just how crucial each decision is. Let’s walk through the most important factors to consider.

Integration with Existing Systems

First off, it’s important to see how well the voice API fits into what you’re already using. A good voice API should smoothly become a part of your current software and platforms, whether those are on iOS, Android, or the web. 

The API should come with SDKs (software development kits) that match your systems well and are simple to use. This helps keep the voice features high-quality without messing up the flow of work you already have going. 

For example, if you are adding voice call features to an app, you’ll want an API that comes with complete SDKs for both iOS and Android. 

This makes it much easier for your developers to put voice features right into your app, making it better for users without too much extra work.

Technical Capabilities and Functionality

When you’re picking a voice API, don’t just think about the basics like making and taking calls. Look at what else the API can do. 

Does it offer advanced options like directing calls, using interactive voice responses, and connecting through both traditional phone lines and internet calling? Make sure it can handle clear voice calls even when the network isn’t great. 

You should also check if the API can do things like turning spoken words into text, recognizing speech, and maybe even using AI to help you connect better with your customers. 

For example, companies like Twilio provide a bunch of different communication tools that can really make a difference in how you talk to and serve your customers.

Reliability and Uptime Guarantees

It’s critical that the voice API is reliable. You need to be sure that the API’s service will be up and running when you need it. Look for service agreements that promise a certain amount of uptime. 

The API should be strong enough to handle lots of calls smoothly even when it’s really busy. This shows that the API is built well and can keep your communications professional and efficient.

Security and Authentication Features

Security is a must when choosing a voice API. The API should have strong security measures to keep your calls and customer data safe. This includes protecting the voice data itself and making sure connections to phone networks and the internet are secure. 

Voice data should be encrypted whether it’s being sent, received, or stored. Also, check that the API meets international security rules, especially if you work in more than one country. 

A secure API not only prevents data problems but also helps your customers trust you more.

Pricing and Scalability

Lastly, think about how much the voice API costs and whether it can grow with your business. The pricing should be clear and adjust based on how much you use it. 

Whether you pay by the minute, by the call, or get unlimited services, the cost should make sense for the value you’re getting. It’s also important that the API can handle more work as your company gets bigger. 

Companies like Vonage and Plivo offer flexible pricing that can change as your needs grow, whether you’re just starting out or you’re a large enterprise.

By focusing on these areas, you can find a voice API that fits your current needs and grows along with your business. 

Choosing the right API helps you improve how you connect with customers, streamline how your business runs, and succeed in a competitive market.

Discover the Magic of Realistic AI Voices With PlayAI: Your Go-To for Professional Voiceovers

If you’re looking for a tool that brings your content to life with realistic voices, PlayAI is worth checking out. Ideal for creating dynamic voiceovers and rich audio experiences, PlayAI offers cutting-edge TTS (Text-to-Speech) technology. 

It provides a range of realistic voices that can transform written content into engaging spoken word, making it a fantastic resource for all your AI voice generation needs. 

Why not see the difference it can make? Try PlayAI today and elevate your projects with high-quality voiceovers.

What are some use cases for integrating a voice call API into my business?

Integrating a voice call API, like one of PlayAI’s voice agents, can revolutionize various aspects of your business. For sales teams, it can facilitate direct voice communications from within your CRM system, speeding up outreach efforts. 

In customer service, embedding a voice call API can enable real-time support directly through your website, enhancing customer experience and engagement. 

For internal communications, such APIs can be used to build custom conferencing tools that keep teams connected.

How does a VoIP service differ from traditional PSTN services when using a voice call API?

VoIP (Voice over Internet Protocol) services allow you to make voice calls over the internet rather than through traditional PSTN (Public Switched Telephone Network) lines. 

This technology can offer more flexibility and typically comes at a lower cost than PSTN services. 

Additionally, VoIP can be integrated into various applications and platforms using APIs, which enhances your ability to embed high-quality voice communication tools directly into your business apps, fostering better customer engagement.

Can embedding a chat API improve customer experience?

Absolutely! Embedding a chat API can significantly improve customer experience by facilitating instant communication. 

Customers can quickly get answers to their questions without leaving your app or website, which significantly boosts satisfaction and engagement. 

Additionally, advanced chat APIs can support features like automated responses and notifications, making the interaction smoother and more efficient, and allowing your customer support team to handle inquiries more effectively.

What should I look for in a service provider when choosing a voice call API for notifications?

When selecting a service provider for a voice call API that will handle notifications, look for robustness in delivering high-quality voice notifications without delays. 

The provider should offer comprehensive API capabilities, like PlayAI’s functionalities, that allow for easy integration with your existing systems. Also, ensure that the provider supports scalability, so as your business grows, your ability to send notifications remains unhindered. 

Finally, check their track record for reliability and customer support, as these are crucial for maintaining a seamless flow of communications.

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Hammad Syed

Hammad Syed

Hammad Syed holds a Bachelor of Engineering - BE, Electrical, Electronics and Communications and is one of the leading voices in the AI voice revolution. He is the co-founder and CEO of PlayHT, now known as PlayAI.

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