Best Voice Calling API & SDK Providers in the USA
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Compare the Top Voice Calling API & SDK Providers in the USA as of January 2026
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What are Voice Calling API & SDK Providers in the USA?
Voice calling API and SDK providers offer developers with the necessary tools to integrate voice calling functionality into their applications. These providers typically offer a range of options, including APIs that allow for an easy integration process, as well as SDKs that provide more advanced features such as call recording and real-time transcription. They also often provide comprehensive documentation and technical support to assist developers in implementing these services. Some of the major players in this field include Twilio, Voximplant, and Nexmo, each offering their own unique set of features and pricing plans. In general, these providers aim to make it easier for businesses to incorporate voice calling capabilities into their products without having to build them from scratch. Compare and read user reviews of the best Voice Calling API & SDK providers in the USA currently available using the table below. This list is updated regularly.
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1
EnableX Communications APIs
vCloudx
EnableX makes integrating real-time communications into applications and workflows a lot easier. Designed and developed for Service Providers, Systems Integrators, and Developers, it provides a robust, scalable and secure communications platform without the complexity of building and maintaining the network infrastructure. By simply leveraging on EnableX comprehensive sets of programmable APIs and SDKs, developers can rapidly customize and embed all or part of the communication functions – voice, video, SMS and chat – right into existing applications, workflows and systems. Together with the Virtual Number services and advanced features such as AI and NLP, businesses can reach customers globally with an outstanding communication experience. -
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Dyte
Dyte
Dyte's Video SDK and APIs are SOC 2, GDPR and HIPAA complaint. That lets you embed scalable, customisable and interactive video calls within minutes into your Web, Desktop or mobile apps. Collaborate efficiently with HD video, chat, screen sharing, whiteboard, emoji reactions, file sharing and everything a user packaged within one SDK. Dyte's Video Conferencing SDK & APIs are comfortable with React JS, Angular, JavascriptMobile: Flutter, Kotlin, Swift, React Native, Android, iOSDesktop, Electron. With an uptime of 99.99%, industry-leading documentation and out of the box plugins, customize the video experience for your ed-tech, tele-health, fitness, HR-tech, social or gaming platform. Use Dyte's SDKs to build fully custom video experiences powered by a robust infrastructure. With our out-of-the-box chat, plug-ins, recording, and several useful features, Dyte is an all-in-one SDK to help you take video collaboration to the next level. Dyte offers 10K free credits each monthStarting Price: $0 -
3
Video SDK
videosdk.live
Saving your time in building UI and features for your video calling application. With just 5 lines of code, you'll be able to integrate video calls into your application. Generate API Key to eastablish connection in-between your app to Video SDK. It enables end-to-end secure connection in-between your app and our servers. Install the simple JavaScript code in your website. In just few lines of code, you can build interactive video calling app. Analytics Dashboard will help you to monitor all the usage of services and also provide manual operations control. Everthing you need to build custom and branded live shopping experiences for eCommerce brands at any scale. Everthing you need to build custom and branded highly secure telemedicine communication APIs and SDKs at any scale.Starting Price: $0.6 per min -
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ZEGOCLOUD
ZEGOCLOUD
Embed engaging real-time voice, video, and in-app chat experiences into your apps with ZEGOCLOUD's communications APIs. Get started with 4 lines of code and enable enriched interactions with more features. Use our voice, video, and in-app chat SDKs to develop the exact communication features your users need to connect, share, and interact with each other anytime, anywhere. Liven up the interactions and elevate the vibes for your users with a rich set of add-ons, including emotionally responsive avatars, AI-powered video effects, whiteboards, and more. Monitor the quality of communications in real-time and gain insights into your user experience with our powerful monitoring and analytics tools, so you can respond to any issues swiftly and improve your services continuously. ZEGOCLOUD's social solutions help you build 1-on-1 and group video calls, live audio rooms, and social live streaming into your apps to help your users connect and have fun together.Starting Price: $0.59 per 1000 minutes -
5
Agora
Agora.io
The Real-Time Engagement Platform for meaningful human connections. People engage longer when they see, hear, and interact with each other. With Agora, you can embed vivid voice and video in any application, on any device, anywhere. Agora provides the SDKs and building blocks to enable a wide range of real-time engagement possibilities. Our network monitors activity in real time and automatically selects the most efficient routing path for sub-second latency globally across 200+ data centers. Compatible with all popular development platforms and mobile-device friendly with minimal battery consumption. Architected to withstand sudden spikes in traffic, gracefully scaling from one to millions of concurrent users as your business demands. Developers can create unique experiences with our extensive APIs, customizable UI and pre-integrated third-party extensions. Deliver the best quality real-time voice and video to your users with ultra-low latency and intelligent routing.Starting Price: $0.0265 per minute -
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Creating Customer Journeys Through Conversations. Engaging experiences that move with your customers. Loved by developers. Built for business. Vonage Communications APIs (formerly Nexmo) helps growing startups and agile enterprises enhance their customer experience and realize new business outcomes at scale. With our easy-to-use APIs, global platform, and expert support, you can abstract the complexity of communications and innovate faster. Reimagine voice interactions to redefine your customer experiences. Make each message count as an opportunity for your customers and your business. Enhance security and privacy—and create seamless login experiences. Build modern, high-quality voice applications in the cloud. Programmatically send and receive SMS in practically every country. Get real-time intelligence on any phone number in the world. Make and receive calls from the cloud with your existing VoIP infrastructure.
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