In today's digital age, everything around us is changing to make the most of new opportunities. Thanks to rapid technological advancements, voice call apps using WebRTC have become really popular in recent years.

These voice APIs have emerged as a cornerstone in the realm of voice chat apps, enabling seamless voice communication and serving as a catalyst for substantial business growth and success.

This article explores the top voice call API/SDK in the market that has made a significant impact across different areas. Their influence has motivated developers to try their hand at building their own voice applications."

Let's embark on a journey to explore these APIs and gain a fundamental understanding of their significance in the landscape of voice communication.

What Should An Audio Calling API Offer?

Voice calling APIs serve as the essential bridges that empower companies to seamlessly incorporate voice call functionality into their applications, facilitating connectivity and enabling business transactions to thrive.

In a sea of voice conferencing system APIs available in the market, it's imperative to navigate based on specific criteria to pinpoint the optimal voice API for your needs.

Let's delve into four crucial criteria that should guide your selection process:

  1. Variety in API Features: Seek out an API that boasts a diverse range of features, enhancing the capabilities and distinctiveness of your application.
  2. Popularity and Market Demand: Gauge the popularity and demand for the API in the market. This assessment helps you gauge the API's value and relevance in the broader landscape.
  3. Cost and Investment: The financial aspect plays a pivotal role in any development endeavor. It's essential to thoroughly evaluate the pricing and investment required for the chosen APIs, as it significantly shapes your development journey.
  4. Compatibility and Ease of Integration: Prioritize APIs that align seamlessly with your existing infrastructure. Ensuring compatibility and ease of integration into your pre-existing or ongoing projects is paramount.

10 best audio calling APIs & SDKs in 2024

The 10 best voice-calling APIs and SDKs are Video SDK, Twilio, MirrorFly, Agora, Sendbird, Plivo, Sinch, EnableX, Vonage, and MessageBird.

1. VideoSDK

Step into the realm of VideoSDK, an extraordinary integration solution that has garnered a reputation for its remarkable speed in seamlessly infusing audio calling capabilities into applications, all accomplished within an astonishing 10-minute span. This platform represents a paradigm shift in efficiency, offering a harmonious blend that caters to the needs of both end-users and developers alike.

A standout feature of Video SDK is its inherent versatility, a quality that resonates through its cross-platform compatibility. It effortlessly spans an impressive array of programming languages and frameworks, encompassing the likes of JavaScript, React JS, React Native, Android, Flutter, and iOS.

Features offered by VideoSDK

  • High availability with zero maintenance
  • Unlimited parallel room in real-time
  • Support up to 300 attendees, including 50 presenters
  • Global Infrastructure for every use case.
  • 100% Fully customizable UI
  • Accelerate your time-to-market with our code samples
  • Customize template layouts, in any orientation
  • PubSub feature to build engaging features.
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2. Twilio

  • Twilio is a widely known programmable voice API that aims to enhance phone services by enabling users to engage in phone calls and manage text messaging.
  • While it aspires to facilitate personalized interactions and engage users on a broad scale, there are certain considerations worth noting.
  • The REST API does offer voice chat capabilities, yet its implementation for routine purposes might be accompanied by certain limitations.
  • Additionally, while it provides access to carrier networks and tools to address communication challenges, there could be certain complexities associated with solving these issues.

See how Twilio compares with its competitors

3. MirrorFly

  • However, while MirrorFly does offer a customizable audio-calling API within a SIP/VoIP infrastructure, some users have reported concerns about its reliability.
  • Despite the promised 99.999% uptime SLA, there have been instances of latency issues affecting the overall call quality.
  • Additionally, while encryption is touted for security, there have been reports of occasional dips in the call's audio quality when encryption is in use.

4. Agora

  • Although Agora's voice call API offers real-time voice interactions and the convenience of cross-platform support, some users have reported occasional connectivity issues and a learning curve when integrating the API into their applications.
  • It's important to thoroughly test the API within your specific use case to ensure its performance meets your expectations and requirements.

See how Agora compares with its competitors

5. Sendbird

  • While SendBird offers a proven managed infrastructure for voice communication, some users have reported occasional challenges with the integration process and a learning curve when using the APIs.
  • Additionally, the pricing structure might not be the most budget-friendly option for smaller businesses or startups.
  • It's recommended to thoroughly assess your project's requirements and budget before committing to SendBird's voice API.

6. Plivo

  • While Plivo does provide a wide range of carrier network connections and the ability to embed voice calling and text messaging into apps, some users have encountered challenges in terms of the complexity of the API documentation and integration process.
  • Additionally, there have been reports of occasional latency issues during voice calls.
  • It's important to carefully review the documentation and consider the potential learning curve before opting for Plivo's voice-calling APIs.

7. Sinch

  • While Sinch does offer a range of communication APIs, including voice calls, some users have expressed concerns about the quality and reliability of the voice calls when using their APIs.
  • Reports of call drops and audio quality issues have been noted in certain cases.
  • It's important to thoroughly test Sinch's voice APIs for your specific use case to ensure that the call quality meets your standards and that there are no unexpected interruptions during critical communication moments.

8. EnableX

  • While EnableX does offer a range of voice calling features through its APIs, some users have reported challenges with the overall user experience and the quality of voice calls.
  • Delays in call setup, audio disruptions, and occasional call drops have been reported by certain users, impacting the seamless communication experience that is essential for audio-calling applications.
  • It's recommended to thoroughly evaluate EnableX's voice calling capabilities and conduct extensive testing to ensure that the platform meets your performance and reliability expectations.

9. Vonage

  • While Vonage's voice chat API does bring innovative features to the table, some users have reported challenges with the integration and customization process.
  • The flexibility touted by the API might come with a learning curve, and developers might find themselves needing to invest additional time to fully adapt the API to their specific business needs.
  • Furthermore, the voice control and voice bot features, while promising, may require careful implementation and tuning to achieve the desired level of performance and user satisfaction.
  • It's advised to thoroughly assess the API's documentation and support resources to ensure smooth integration and optimal utilization of its advanced voice features.

See how Vonage compares with its competitors

10. Messagebird

  • While MessageBird offers a range of communication channels and features, some users have highlighted certain limitations in the voice API's performance and reliability.
  • Reports suggest that occasional call drops or delays might occur, which could impact the quality of real-time voice communication.
  • Additionally, the pricing structure for MessageBird's voice API might not be the most cost-effective solution for businesses with high call volumes, as the costs can escalate with increased usage.
  • Prospective users should carefully evaluate the API's performance and pricing against their specific requirements to determine whether it aligns well with their communication needs.

Elevate Your Audio Calling App with the Ideal Audio Calling API Integration Today

Embracing the power of voice communication, numerous platforms have emerged, catering to the global demand for interactive conversations. This comprehensive article dives into the realm of voice chat APIs, presenting an array of 10 prominent options that expedite the creation of voice call applications with efficiency and minimal resources.

Among these, VideoSDK's voice-call API stands as a standout recommendation, celebrated for its exceptional attributes and robust support. Notably, Video SDK's offering boasts the remarkable capability of ultra-low latency, empowering developers to craft applications that seamlessly accommodate up to 10,000 users per audio call.