6 December, 2021

2021’s Top Voice API & SDK Providers “A Market Research”

Where the world is transforming into digitalization, everything around us is upgrading to its potential in all possible ways. With the enhancement in technology, the WebRTC based Voice call app has obtained a lot of popularity over the past few years.

These are the voice chat APIs that are making sense throughout when it’s about voice chat apps, with which one can often make and receive calls over the apps making the most stable accomplishment in business growth and success.

This is the post which talks about the most popular voice APIs in the market, that has created the most powerful impact across everything. This has almost encouraged the developers to create their own voice application.

So, Let’s start with the basic understanding about these APIs.

The Powerful Voice Chat APIs, What are they?

Well, voice chat APIs are the application programming interface or tools that enable the companies to integrate the ability to make and receive voice calls within their application allowing you to stay connected and make business transactions.

However, there are many voice conferencing system APIs available in the market, but there are some specifications based on which you can go for the best voice API.

Let’s have a look at the four major criteria that you must look for,

  1. Variety in API Features – look out for a variety in API features that can make your application more capable and unique in all sense.
  2. Popularity, Demand in the Market – This assist you to determine the worth of the API that you want to implement into your application.
  3. Investment, the Cost – Mostly an entire development process relay on pricing/investment, so it is vital to examine the cost of the APIs that you were planning for powering voice calls.
  4. Compatible and Easy to Use – Better to check whether the APIs are compatible and easy enough to use and integrate into your pre-built or existing device.

Once you are done with the above mentioned major criteria’s, now it’s time to have a check on the list of top 10 best voice APIs in the market.

Top 11 Voice APIs for iOS, Android & Web App – A Complete Study

Let’s have a look at the top 10 voice APIs concerning features, pros, cons and pricing and have better understanding,

1. CONTUS MirrorFly Voice APIs

MirrorFly secure voice api
CONTUS MirrorFly voice APIs are the real time communication solution that is mostly considered by developers and enterprises for it’s unique trait of being end-to-end customizable with one time license cost. It allows the developers to build their application with an easy integration of voice, chat and video features into any iOS, Android or web app.

Moreover, its voice chat APIs and SDKs are highly secure and scalable with over 150+ voice features that can collaborate and engage over 1 billion + concurrent users anytime, anywhere across any device.

CONTUS MirrorFly’s Best Audio Call Features
  1. One-to-One & Group Voice Calling
  2. Voice Conference Calling
  3. Interactive Voice Response (IVR)
  4. SIP/VoIP Calling
  5. Cross-Platform Calling
  6. Voice Call Recording
  7. Audio Encryption
  8. Text to Speech
  1. Very simple to connect with remote team globally
  2. Share any type of files of any size
  3. It is very easy to deploy and scale
  4. Fully customizable with custom features
  5. Provides access to source code to add multiple functionalities and features
  1. Takes some time to work through the set-up process

One time license cost

2. Twilio Voice APIs

twilio Programmable Voice android API

Twilio is the popular programmable voice calling API that brings a power to the phone services by enabling users to make and receive phone calls, send and receive text messages. Twilio powers a personalized interaction by engaging users at a large scale in it’s single platform across any channel.

With the REST API, the developers can integrate it’s voice chat functionalities for regular purpose alongside with query metadata about calls. It offers access to carrier networks and also provides codes to solve communication issues.

Twilio’s Best Audio Call Features
  • Insights & Reporting
  • Set up SIP
  • Detect Answering Machines
  • In-progress Calls Modification
  • Retrieve Call Logs
  • Language Compatibility
  1. Nice tool to build an infrastructure for making phone calls and sending SMS messages
  2. Supports businesses to communicate effectively and programmatically
  3. Reply within a few hours
  4. Easy to work with tool plugs
  1. Poor Customer Support Service
  2. To Operate Need to have Some Technical Skills
  3. Quite Expensive

Available at a monthly subscription

3. Apphitect Voice APIs

apphitect voice call api

Apphitect is a leading mobile app development company, based in UAE. Apphitect.ae is built with real-time instant messaging elements and is one of the best chat APIs for Android and iOS applications. The application is equipped with rich and customizable UI/UX designs with a facility of unlimited cloud storage. 

Also, it allows third-party integrations that can assist you to  scale up the prevailing architecture. The flexible, scalable and multi-faceted features makes Apphitect Voice APIs, one of the best chat SDKs for multiple devices and iOS, Android applications.

Apphitect’s Best Audio Call Features
  • One-to-One and Group Audio Calling
  • Live Broadcasting
  • SIP and VoIP Calls
  • Conference Calling
  • Push Notifications Features
  • Voice Recording
  • Audio Encryption
  1. Easy Integration with 24×7 Customer Support
  2. Zero Downtime
  3. Scalable and Trustworthy Solution
  4. Offers Unlimited Storage Options and Cloud Hosting too
  1. Apphitect can be used only by Enterprise business purposes

One-time License Cost

4. Plivo Voice APIs

plivo voice chat Api for android, ios and web platforms

Plivo is a cloud communication platform that enables the developers to embed voice calling and text messaging into any mobile and web app with no restrictions over carriers. Plivo is in direct connection with over 1600 local carrier networks that deliver reliable connectivity in 195 countries. It offers a cost-effective and easy-to-deploy solution around the world.

Plivo allows the businesses and developers to build their voice and SMS communication using any web standard language. Its voice calling APIs facilitate the placing of phone calls with native SIP support and SDKs.

Plivo’s Best Audio Call Features
  • SIP Gateway and Devices
  • Voice Alerts and Survey
  • Audio Conferencing
  • Call Monitoring and Transfer
  • Call Recording and Routing
  • Automated Responses
  1. Much Improved User Interface
  2. Great 24/7 Customer Support Services
  3. Comprehensive Documentation is Easy to Understand
  4. Easily Integrates with 3CX and Works Globally
  1. The Service should have Templates to Work with PBX Systems
  2. The API Mostly Send the Error Message Most of the Time
  3. Not Showing the Caller ID on SMS Text Messages

Available at a monthly subscription

5. Siri Voice APIs

siri voice solution for developers

Siri voice API, also known as Sirikit voice API, is the intended UI framework which allows the developers to implement app extensions that integrate the chat system. Thus, it makes it possible to integrate the voice assitant’s functionality into third party apps. Siri’s voice chat APIs can be used to deploy a state of the art interface which can provide a smart answer to users.

Siri voice API uses two technologies – voice recognition and processing of natural language. Siri can be used with intent extension where the program can communicate via purpose extension.

Siri’s Best Audio Call Features
  • Make Voice Queries
  • Perform Voice Related Tasks
  • Offers AI Assistance
  • Add Intelligence Voice Assistance
  • Smart Answer Options to Users
  1. Sirikit Contributes to the App’s Efficiency Improvement
  2. It is Compatible with Six Distinct Type of Applications that Includes Video/Audio Calls, Email, and Payment Apps
  1. It Limits the Demand for iOS Developers
  2. When Sirikit is Enabled in a Third-Party Application, the Sirikit has Limitations in Words
  3. Can Perform Error when Dealing with a Variety of Users for whom Siri Assumes Commands

Available at a monthly subscription

6. Vonage Voice APIs

vonage - top audio streaming service

Vonage provides a cloud communication building block APIs that are used in several communication modes as audio calling, group calling, SMS, messaging apps, SIP trunking and much more. They also enable two factor authentication dispatching the services for multichannel message delivery.

Since, Vonage works directly on its direct carrier network Vonage, it continues to expand its service of reaching out to almost any phone in a single platform. It has a communication solution that is highly secure to protect any privacy concerns.

Vonage’s Best Audio Call Features
  • Routing is based on location
  • SIP deployment (Beta)
  • Billing is performed in per second
  • Vonage has coverage to over 1,600 carriers in almost 225 countries across the world
  1. Available with Best voice quality and the best dialing software
  2. Very efficient to network and connections
  3. Enables to send fax 
  4. Easy to access from anywhere across any device
  5. Available add-on app
  1. They don’t take billing support calls, available only at chat
  2. Desktop app switches frequently from headset to webcam automatically during the session
  3. Text messages does not support images

Available at monthly subscription

7. SendBird Voice APIs

sendbird voice messaging software

Sendbird voice communication APIs provide high-quality communication audio calls. It’s proven managed infrastructure is always available for massive scale of conversations. It  permits to perform personal and group calls with no downtime and lag, experiencing a secure and compliant voice chat and communications.

Sendbird voice call APIs enable the calls to be backed by highly scalable and reliable chat platform infrastructure, this is to deliver a more immersive digital experience. It’s on-device multimedia feature eliminates the loss of data by providing the user with the ability to record video, audio and image files directly from the app.

SendBird’s Best Audio Call Features
  • Integrate user ID with chat
  • On-device call recording
  • Duto-reconnect
  • Call history
  • Notification
  • Multi-device support
  • Intuitive user interface that’s easy to use 
  • Highly reliable and secure communication 
  • Detailed documentation and proactive support team
  • Documentations need some more improvement with more use cases

Available at a monthly subscription

8. EnableX Voice APIs

enablex in app voice messaging software

EnableX is a communication platform that provides you the capability to build your smart and scalable audio calling app across a variety of devices. It’s robust set of APIs enables you to build one-on-one VoIP calls that connect you to PSTN networks globally, on the WebRTC platform. 

It supports voice broadcast, voice conference calling, call masking, and much more. It leverages CPaas for developers, which allows them to integrate voice features into their system with no investment over the back-end.

EnableX’s Best Audio Call Features
  • Call masking
  • Calling line identification
  • DTMF support
  • Automated voice message
  • Voice broadcasting
  • Interactive voice response
  • Supportive customer service
  • No limitation, the participant can create maximum number of group/public group
  • Easy to use interface
  • Problem with quality and user interface if not connected with enablex supportive Cordova plugin
  • Sometimes faced issues on different devices after integrated into the app

Available at monthly subscription

9. Sinch Voice APIs

sinch in app voice calling android software

Sinch is a real-time VoIP and SIP API provider that allows the businesses to create the best voice call apps on any device such as iOS, Android, and web app. It offers many standard communication APIs like SMS, messaging apps, audio calling, video calling, etc. Sinch provides hassle-free integration of high-quality voice APIs that supports VoIP, PSTN and SIP. 

It’s cross platform application delivers a multi-party voice call feature that creates an engaging and deeper conversation between the brand and the customers.

Sinch’s Best Audio Call Features
  • Cross-platform support
  • Voice calling
  • In-app voice calling
  • Number masking
  • Backing for popular coding languages, certification for long and short codes
  • Two-factor identification
  • App simulation
  • Route management
  • Need improved UI for easier navigation to the owned short codes and status of their certification
  • List of carrier requirements for certification

Available at monthly subscription

10. MessageBird Voice APIs

messagebird voice message service

MessageBird is a cloud communication platform that connects the businesses with their customers across multiple channels. It’s products and solutions are the foundational building blocks to business communication that includes WeChat, Messenger, Email, SMS, Voice, etc. 

MessageBird supports multimedia features for direct stream video and also has a powerful VoIP infrastructure for reliable and secure voice application.

MessageBird’s Best Audio Call Features
  • Telco stack
  • Tested routes
  • Decentralized call centers
  • Custom hold music
  • Transfer call
  • Masked number
  • Webhooks for delivery reports
  • Users can transfer a client to another user without the need of permission
  • Easy to use interface with amazing pricing when purchased in bulk
  • Sometimes it does not work in real-time, leaving the client to wait in an invisible “queue”
  • It has no integration with Pipedrive CRM
  • Sometimes it will have delivery issues with certain phone numbers

Available at monthly subscription

11. QuickBlox Voice APIs

quickblox voice message service

QuickBlox is a feature-rich communication app provider that offers a powerful tool-kit with easy-to-use APIs and native, hybrid SDKs for real time communication. It’s one of the major backend infrastructure that focuses on offering VoIP APIs and SDKs to integrate voice calling features into any existing mobile and web app.

QuickBlox offers a ready-to-go module that allows the developers to build their own ideal voice call app with the features of their choice that moves along with all types of devices.

Quickblox Best Audio Call Features
  • Remote media track
  • VoIP calling
  • VoIP push notification
  • Supportive customer service
  • No limitation, the participant can create maximum number of group/public group
  • Easy to use interface
  • Does not provide customizable UI theme
  • Lack multi-language chat interface

Available at monthly subscription


However, the above given list of these voice chat API providers are some as there are many around the global market. This is something based on my research. Now, it’s your time to do some research from your end too to have a better clarity with the market’s current situation if you were planning to build your best voice call app.

Whatever be the case, if you still feel you need some more guidance then just feel free to contact, will be there to assist you!

All the Best!


  1. George Reply

    Thanks for sharing wonderful source. I want to build a voice chat app for healthcare app and it will really help me lot to choose best voice api service providers

  2. Michael Reply

    Very detailed analysis on the best voice api and sdk on providers list. This is really very nice post you shared, i like the post, thanks for sharing.

  3. Abdullah Reply

    Hello, I really curious to know about how you’re compared and reviewed these top voice api providers. Loved your way of presentation, Your blog is really an enlightenment for us readers! Thank you very much!

  4. Johnson Reply

    Thanks for sharing this great article! It’s nice to know so much about voice APIs and SDKs. But I feel it would be much fine if you would have added something about “Apphitect too as I am interested to know about them. Thank you..

  5. Albert Raj Reply

    Thanks for sharing the best voice api providers. I really like your blog post very much. You have really shared a informative and interesting blog post with people.

  6. Arul Kumar Reply

    I Really liked this article. Well curated explanation about the top voice api sdk providers. It will be useful for us to explore the top one to build our voice chat app.

  7. Raja Sekar Reply

    Great article. Thanks, I have just been searching for info about the best voice api providers for a while and yours is the greatest I have found out so far. Great points you made there in your article.

  8. Krushi Shivasangaran Post author Reply

    Hi Johnson, Thanks your interest in APIs and SDKs. As you have requested I have added my views on Apphitech. Kindly, have a look and let me know if you need something else specific too. Happy to guide you ever. Thank you!
    Thanks for your keen

  9. James Steve Reply

    Very nice article, You covered the list of top voice api & sdk providers with it comparison on all kind of aspects. I would like to thank you for the efforts you have made in writing this article.

  10. Govindarajan Reply

    Best article about top voice api providers. I need to integrate your voice api into my voice call app, I want to know the possibility of customization.

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