Best Voice Calling API & SDK Providers

Sendbird’s Voice and Video APIs empower businesses to integrate high-quality, real-time voice and video communication into their apps. With support for both direct and group calls, these APIs provide a rich set of features such as video mirroring, call muting, and screen sharing, ensuring a seamless and interactive user experience. The platform supports multi-device and cross-platform capabilities, along with strong security features like media stream encryption and HIPAA compliance. Ideal for industries such as healthcare, e-commerce, and social platforms, Sendbird enables businesses to create engaging and secure communication solutions without complex development overhead.

Twilio's Voice Calling API and SDKs empower businesses to integrate voice communication capabilities into their applications, providing a seamless and efficient way to connect with customers over the phone. This integration allows businesses to enhance their customer engagement strategies by offering personalized and real-time voice interactions. The Voice Calling API enables businesses to make, receive, and manage calls programmatically, offering a high degree of flexibility and control over voice communications. This capability is crucial for businesses looking to automate call workflows, such as customer support hotlines, appointment reminders, or sales calls, thereby improving operational efficiency and customer satisfaction. Twilio's Voice SDKs support various platforms, including Android, iOS, JavaScript, and React Native, allowing developers to build voice-enabled applications across different devices.

MirrorFly is a CPaaS platform that empowers businesses and enterprises to add real-time chat features into their existing applications and websites. MirrorFly CPaaS offers text, voice, video, and broadcasting in an enterprise-grade infrastructure. Startups and large enterprises can build their own chat app with extensive customization and branding capabilities to add logos, brand color, and other brand elements. The self-hosted Chat APIs and SDKs offer 1000+ in-app messaging features with 100% customization. In addition, MirrorFly offers a dedicated developer team to support the end-to-end custom chat app development process. MirrorFly Readymade SDKs: 1. In-app Chat API 2. HD Video Call Solution 3. HQ Voice Call SDK 4. Self-hosted Chat Messaging Solution 5. SIP & VoIP Call Solution 6. Flutter Flow Software 7. Activity Feeds Solution 8. Call Broadcasting 9. Video Conferencing API 10. Video KYC Solution 11. Live Streaming SDK

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.

Access high-quality cloud communications at a low cost with Plivo Communications Platform, a Cloud API Platform and a Global Carrier Services Provider. Plivo Communications Platform enables users to make phone calls to all countries, buy local phone numbers in 55 countries, send SMS to all countries, and more. Available 24/7, Plivo Communications Platform also features free tech support by experts that are happy to assist customers with their issues.

Bird (formerly MessageBird) is the next-generation CRM for Marketing, Sales, and Payments, powering over 5 trillion annual messages across Email, SMS, and WhatsApp. Leading brands grow cost-efficiently with Bird through personalized interactions on Email, SMS, and WhatsApp. The world's most innovative companies build communication solutions using Bird's applications and APIs. Get started today and talk to your customers over any channel, for any use case, anywhere in the world. Marketing messages, push notifications, order updates, delivery alerts and more. Operational bottlenecks slowing your growth? Use automated conversations and workflows to collect critical information up front, reduce manual tasks, implement self-service flows, and route chats to the right agent. Get up and running in minutes on our reliable, auto-scaling APIs with extensive documentations, complete API references and intuitive SDKs.

CometChat is a chat API and in-app messaging SDK (software development kit) that enables users to integrate HD voice and video calling, as well as text chat functionality directly into their mobile and web apps. CometChat also supports features such as push notifications, read receipts, typing indicators, real-time translation, and more. CometChat allows users to create their own user interface for private or group chat applications. Customization tools let users personalize various elements of their chat app. The platform also provides users with the tools to add voice, and video calling and conferencing capabilities to their apps or websites. Users can also send and receive media files through CometChat, as the platform enables users to sync and share files like GIFs, photos, videos, and audio clips. Support for custom payloads mean users can send calendar invites, or share information like their location or event details to chat participants.

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 month

Why spend months building in-app activity feeds and messaging from scratch when you can implement in just weeks with Stream's activity feeds and in-app chat APIs? Stream's reliable APIs, developer-friendly SDKs, and flexible UI kits enable product teams to quickly integrate polished communication functionality often found in social media platforms such as WhatsApp, Facebook Messenger, and Instagram. With an industry-leading 99.999% uptime SLA, over a billion end users, and 5 million concurrent connections recently supported in a single chat channel, Stream's APIs are highly scalable, making them ideal for enterprise-grade businesses and growing startup platforms alike. Ship fully-featured activity feeds and in-app chat functionality faster with easy-to-use software components that give your product a competitive edge.

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.

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.

Infobip is a global leader in omnichannel engagement powering a broad range of messaging channels, tools and solutions for advanced customer engagement, authentication and security. With over 700 direct carrier connections and 60+ offices on 6 continents, Infobip is the #1 choice of some of the world's biggest companies to scale their customer communications. We help our clients and partners overcome the complexity of consumer communications, grow their business and enhance customer experience, all in a fast, secure and reliable way. With Infobip, you can achieve deeper customer engagement across the widest selection of local and global channels, including: SMS MMS RCS Live Chat WhatsApp Business Apple Messages for Business Facebook Messenger Instagram Business Telegram Viber Voice / VOIP Video Email

mesibo is a powerful real-time communication platform to quickly add robust real-time messaging, group chat, voice, and video calls, conferencing into your mobile and web applications. The key objectives while designing mesibo APIs were reliability, performance, and scalability. We have seen APIs as complex as the universe making apps unnecessarily complex and error-prone. We have instead worked hard to make mesibo APIs simple, yet powerful. In this section, we will explore mesibo real-time APIs in detail. It is highly recommended that you also refer to the source code of one of the mesibo sample app in GitHub to learn how APIs are used. This makes it easy for you to write cross-platform code across platform. In the following sections, we will describe APIs with name and parameters.

Deliver timely, personalized information through global SMS/RCS and voice cloud communications. Gain a deeper understanding of your customers from actionable global phone number and subscriber data intelligence. Code once and message your customers at scale using TeleSign’s Messaging API - complete with waterfall delivery between channels. TeleSign Messaging API includes SMS, RCS, and WhatsApp to help you build secure digital communications that connect you with your customers anywhere in the world. Integrate a single Messaging API and start sending reliable, secure SMS, RCS and WhatsApp messages to your customers today. Choose one or all three channels to broaden your programmable messaging strategy and expand your audience. Reach more customers with 120+ optimized points-of-presence and 700+ direct-to-carrier routes​.

Create more engaging customer experiences at scale with SMS, Chat Apps, Video & Voice APIs. Industry standard APIs make it easy to quickly automate notifications. 24/7 customer support ensures expertise is always there when you need it. Reliable delivery provided by our global, carrier-grade platform. Reach your customers anywhere with coverage across 190 countries and 130 network operators. Reliably reach customers anywhere with notifications, one-time passwords, reminders and alerts. Reach more customers with the ability to deliver messages across many different platforms through one API. Live support with the click of a link. Convert text to speech to create tailored, private messages at scale using this API. The Campaign Manager lets you instantly start sending SMS campaigns without integrating an API. Access the online portal, upload approved contacts and start communicating.

Seamless Integration of In-app Messaging SDK & Chat API for Mobile & Web Apps. A multi-faceted chat API & messaging SDK that supports to build instant messaging apps that power real-time communication with a native chat experience. Unified messaging API & chat SDK integration to extend the real-time communication with an extensive collaboration utilities of your Instant messaging app. The messaging SDK Can be easily integrated with third party integrations for extending the chat APIs functionality. Custom-built personal chat apps with rich UX, Voice & video call integration, Native messaging SDK support, multimedia sharing and much more. Built network communities & user-engaging social chat apps with real-time instant messaging characteristics. Apphitect instant messaging solution being a gives you the facility to create hangouts apart from one on one chats. Group chats certainly add vibrant to your mundane chat conversations.You can create hangouts on your mobile chat app.

Build your own messenger with chat and video calling in minutes using QuickBlox chat API and SDK. QuickBlox provides instant messaging API that allow chat and calling functionality to be added to any Android, iOS, or Web application. All features that you need to build a great messaging application. High quality one‑to‑one and group calling built on WebRTC. Flexible data and file storage that compliments your messaging. Integrate your current business processes with real‑time alerts and notifications. Share and link all types of files (images, audio, video, docs, and other file formats). Over 30,000 software developers and organizations worldwide are using QuickBlox messaging API. QuickBlox is a HIPAA‑compliant chat solution trusted by Healthcare businesses worldwide. We serve a variety of customers ranging from large corporations storing millions of healthcare and insurance records to startups entrusting their telemedicine communication to us.

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.

Engage your customers like never before - on any channel. CPaaS and APIs for SMS, Voice, Video & Verification. Reach every mobile phone on the planet, in seconds or less. Engaging your customers the right way can help you more than double webshop orders. We know - we helped a major telco company do just that with a friendly online chatbot. We helped a major automative company re-engage and convert end-of-funnel prospects not responding to email. The results of the personalized Rich SMS campaign speak for themselves. Are your customers missing appointments? Engaging SMS reminders help both them and you, making you more revenue. Tried and trusted by developers around the world. Build with confidence and boost your business - with just a few lines of code. Get closer to your customers and add value to every step of their journey.