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10 Best Voice Call APIs & SDKs (Top SIP API Reviews 2024)

Published On July 3rd, 2024 14367Communication
Explore Voice API & SDK

Looking for something exciting on “Best Voice API in 2024”? This is your time! Here’s your ultimate guide with my research and reviews. Let’s take the journey across with no delay and explore the market beyond the core!

Market Scenario of Voice API

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 API 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 Call APIs, What are they?

Well, voice calling 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, now it’s time to have a check on the list of top 11 best voice APIs in the market.

10 Best Voice API & SDK for Android, iOS & Web Apps in 2024

In 2024 Reviews, The best voice calling APIs & audio chat SDKs are ✔️MirrorFly ✔️Twilio ✔️Apphitect ✔️Sendbird, ✔️Plivo ✔️Siri ✔️Enablex.dbird, ✔️Plivo, ✔️Siri, ✔️Enablex.

API ProviderPopularityPricing Model
MirrorFly#1 SaaS & Self-hosted voice call APIFree + monthly plans
TwilioProgrammable voice APIFree + pay-as-you-go model
Apphitect100% Customizable voice APICustom pricing
SendbirdScalable voice APIFree + monthly plans
PlivoTop-notch voice APIPay-as-you-go model
SiriEasy-to-implement voice APIFree + monthly plans
Top Voice Call APIs and SDKs Providers

#1. MirrorFly

best voice api
“The Most Developer-Friendly SaaS & Self-hosted Audio Call API Provider”

MirrorFly is a leading audio API provider that is highly favored by developers for its advanced voice calling features, fast integration, and E2E encryption protocols. Additionally, it is renowned for facilitating over 1 billion conversations with ultra-low latency and a 99.999% uptime SLA across apps, ensuring uninterrupted video calling experiences for users.

Plus, we also offer SaaS and Self-managed voice chat solutions to help you build engaging voice-calling apps.

Here are the highlights of the two solutions:

MirrorFly Cloud Solution

The cloud-based voice calling APIs let you integrate all real-time features like 1-to-1 and group voice chats, call muting, notifications, call logs, and a handful of others for a monthly subscription fee. Its other benefits include:

MirrorFly Self-hosted Voice Chat Solution

The SaaP solution works great if you are planning to build a white-label voice-calling solution with fully customizable features. Besides, you can avail of 150+ customizable features at a one-time license cost and host apps on your premises.

  • 100% Customizable SDKs
  • One-Time License Fee 
  • White-label solution
  • Dedicated development team support


Self-Managed solution (One-Time License Cost) and On-Cloud (Monthly Subscription)

  • Very simple to connect with remote team globally
  • Share any type of files of any size
  • It is very easy to deploy and scale
  • Provides access to source code to add multiple functionalities and features
  • Takes some time to work through the set-up process
Save Your Time. Integrate Voice Call API in 20 mins!

#2. Twilio

twilio voice api
“A Programmable Building Block”

Twilio is the popular programmable voice 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.

Also Read: Best Twilio Alternatives in 2024

Twilio’s Best Audio Call Features

  • Insights & Reporting
  • Set up SIP
  • Detect Answering Machines
  • In-progress Calls Modification
  • Retrieve Call Logs
  • Language Compatibility


Available at a monthly subscription

  • Nice tool to build an infrastructure for making phone calls and sending SMS messages
  • Supports businesses to communicate effectively and programmatically
  • Reply within a few hours
  • Easy to work with tool plugs
  • Poor Customer Support Service
  • To Operate Need to have Some Technical Skills
  • Quite Expensive
Looking to Recreate your Existing Twilio Platform?
See why developers choose MirrorFly as the #1 Twilio Alternative

#3. Apphitect

popular voice sdks
“Developer’s Absolute Tool Kit – Audio Communication API”

Apphitect is a leading mobile app development company, based in UAE. 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-time License Cost

  • Easy Integration with 24×7 Customer Support
  • Zero Downtime
  • Scalable and Trustworthy Solution
  • Offers Unlimited Storage Options and Cloud Hosting too
  • Apphitect can be used only by Enterprise business purposes
Build A Highly Scalable Voice Call Experience with Our API!

#4. SendBird

sendbird voice api
“A Proven Managed Infrastructure”

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


Available at a monthly subscription

  • 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
Looking to Recreate your Existing Sendbird Platform?
See why developers choose MirrorFly as the #1 Sendbird Alternative

#5. Plivo

best audio call api
“A Desirable Cloud Platform One Needs”

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


Available at a monthly subscription

  • Much Improved User Interface
  • Great 24/7 Customer Support Services
  • Comprehensive Documentation is Easy to Understand
  • Easily Integrates with 3CX and Works Globally
  • The Service should have Templates to Work with PBX Systems
  • The API Mostly Send the Error Message Most of the Time
  • Not Showing the Caller ID on SMS Text Messages

#6. Siri

audio chat api
“Extensively Easy to Implement”

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


Available at a monthly subscription

  • Sirikit Contributes to the App’s Efficiency Improvement
  • It is Compatible with Six Distinct Type of Applications that Includes Video/Audio Calls, Email, and Payment Apps
  • It Limits the Demand for iOS Developers
  • When Sirikit is Enabled in a Third-Party Application, the Sirikit has Limitations in Words
  • Can Perform Error when Dealing with a Variety of Users for whom Siri Assumes Commands

#7. Sinch

voice api for dating apps
“Let you Get An Amazing Voice Call Experience”

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


Available at monthly subscription

  • 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
Build A Full-featured Voice Chat App Using MirrorFly’s API!

#8. EnableX

voice messaging api
“Smart and Adaptable Platform”

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


Available at monthly subscription

  • 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
Ready to Build a Voice Chat App Using Our Flexible APIs?

#9. Vonage

free voice api
“Moves Directly with Carrier with No Middle Man”

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


Available at monthly subscription

  • Available with Best voice quality and the best dialing software
  • Very efficient to network and connections
  • Enables to send fax 
  • Easy to access from anywhere across any device
  • Available add-on app
  • They don’t take billing support calls, available only at chat
  • Desktop app switches frequently from headset to webcam automatically during the session
  • Text messages does not support images

#10. QuickBlox

voice api for social apps
“A Ready-to-Go Module”

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


Available at monthly subscription

  • 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

#11. MessageBird

audio communication api
“A Foundational Building Block”

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 web video chat 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


Available at monthly subscription

  • 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


However, the above given list of these voice 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!

Build A Highly Secure Audio Calling Experience!

Frequently Asked Questions (FAQ)

What is a Voice API?

A voice API (Application Programming Interface) is a set of programming tools and protocols built for developers to quickly add highly-scalable, top-quality voice and telephony features to any existing applications or services. By integrating voice-calling features into communication apps, developers can boost user engagement and create richer, interactive customer experiences. 

What is a Programmable Voice API?

A programmable voice API (Application Programming Interface) is a software interface with a range of tools and features that helps developers to integrate voice-enabled chat capabilities into any existing applications. Moreover, by using a programmable voice API, developers can create conversational IVRs, modify calls in progress, make outgoing and incoming calls, control calls, and add call recordings to their software applications. 

What is the difference between voice call and VoIP?

Voice and VoIP (Voice Over Internet Protocol) are the two different ways of sending voice communication. Traditionally, voice calls use the PSTN to transmit voice signals over a dedicated telephone or cellular network, whereas VoIP uses the internet for voice transmissions. 

Moreover, VoIP is a cost-effective option and offers more advanced features like video conferencing and call recording than traditional voice calls. And these days, businesses using VoIP are increasingly becoming popular.

What is the difference between In-app voice call and normal phone call?

The basic difference between voice call and in-app call is that phone calling is a traditional method where both caller and call use a telephone line to communicate with each other. While, in-app voice calls use a software application to transmit voice messages over the internet between caller and call. Further, to access in-app voice calls, both the sender and receiver must have the same app installed on their mobile device or computer, whereas, a recipient’s phone number alone is sufficient to make a phone call. 

What are the benefits of in-app voice calling?

In-app voice calling offers several benefits or advantages to businesses like clear and prompt communication, cost saving, convenience, audio conferencing and call recording, security and privacy, improved user experiences, and other advanced features. 


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Krishi Shivasangaran

Krishi Shivasangaran is a digital nomad and a veteran of Digital Marketing strategies. She is passionate about learning the newest trends in video APIs. And, when she's off-role, she loves to sketch and make people realize the true color of nature.


  1. George says:

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

    1. Krushi Shivasangaran says:

      Thank your George for your supportive feedback on my voice chat API blog. Really, it encourages me a lot to explore and get to deliver more related helpful content. I appreciate it.

  2. Michael says:

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

    1. Krushi Shivasangaran says:

      Thank you Michael for such appreciative words. I try to deliver my best everytime on your interest. If you are want to know more, then you can have a look at our other related blogs too. And if you want to gather details about some new topic, do share them in the comment, I will get that for you asap.

  3. Abdullah says:

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

    1. Krushi Shivasangaran says:

      Hello Abdullah, thanks a lot for so heart touch words. It’s all because of your encouragement that tends me to do more research before getting into the resolution. Hope to deliver more such contents in future that can fullfil your needs. Thank you once again!

  4. Johnson says:

    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 says:

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

    1. Krushi Shivasangaran says:

      Thank you Albert Raj. Your encouraging words give me the support to write more on voice chat API and SDK providers and related stuff.

  6. Arul Kumar says:

    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.

    1. Krushi Shivasangaran says:

      Thank you Arul, yes of course you can explore with the top ones and even with the rest too, as all of them have been done on research. Simply to make you more insightful about your voice chat app requirement with APIs and SDKs. All the best!

  7. Raja Sekar says:

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

    1. Krushi Shivasangaran says:

      Thank you Raja, that was an encouraging comment from your end. I am glad that you were able to make up your needs through this voice API article for mobile and web apps. Hope to get you further more related content in future.

  8. James Steve says:

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

    1. Krushi Shivasangaran says:

      Thanks for sharing your views James. Yes! I have majorly added these comparisons on voice API and SDK providers with their pros and cons to make you more aware with the aspects that you must be known about before proceeding further with the development process. And I am really glad that you like this kind of approach with providers.

  9. Govindarajan says:

    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.

    1. Krushi Shivasangaran says:

      Thank you Govindarajan. Of course, you can integrate our voice chat APIs into your voice call app with no restrictions. Since, our solution is highly flexible to be customized fully into any 3rd party application with custom features of voice, messaging and video calling as per your business needs. So, feel free to contact us to proceed further. All the Best!

  10. Deepak says:

    Thank your for taking the time to write the top voice chat api providers. This articles help me out to choose the best voice api providers.

  11. Prema says:

    Awesome Article…Thanks for sharing. It is a very helpful content for selecting best voice call api. Your blog is very useful. keep posting

  12. Sathish says:

    I think this is one of the best article about voice api service providers that I’m looking for. Thanks for sharing this article.

  13. Cabilan says:

    Great Article! Thanks for the sharing I am also looking best voice api providers. This article realy helped me lot and time saver.

  14. Joe says:

    Fantastic Article Team. I like the suggestions you made in the voice api & sdk providers comparison. This post definitely help me lot to choose the best voice solution. Thanks a lot.

  15. Krishnan says:

    This is an amazing comparison article about voice api platform providers. I want to build own voice chat app for my business need and it will really help me lot to choose the best voice chat service providers.

  16. Mithun says:

    Thanks. I found a some good ideas in your article and choosing the best voice platform providers for my mobile app.

  17. Swetha says:

    Great post. Your writing is so clear and helpful. I like the suggestions you made in the voice api & sdk providers comparison.

  18. Ajay says:

    Can you guide to choose the voice api solution to develop a voice chat app for our online business.

  19. Nithish says:

    I think very detailed article for those who try to build voice chat platform. I like how you have researched and presented these exact points so clearly. Please keep sharing more!

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