Best Voice Calling API & SDK Providers for WhatsApp

Sendbird’s Voice and Video APIs give companies the tools they need to incorporate top-notch, real-time voice and video communication into their applications. These APIs accommodate both one-on-one and group calls, offering a comprehensive array of features, including video mirroring, call muting, and screen sharing, to deliver a smooth and interactive experience for users. The platform also boasts multi-device and cross-platform functionality, along with robust security measures such as media stream encryption and compliance with HIPAA regulations. Perfect for sectors like healthcare, e-commerce, and social networking, Sendbird allows businesses to develop engaging and secure communication solutions without the burden of complicated development processes.

Twilio's Voice Calling API and Software Development Kits (SDKs) provide a robust solution for businesses seeking to incorporate voice communication features into their applications. This integration facilitates a smooth and effective method for engaging with customers via phone, allowing companies to enrich their customer interaction strategies with tailored and immediate voice conversations. With the Voice Calling API, businesses can programmatically initiate, receive, and manage calls, granting them significant flexibility and oversight over their voice interactions. This functionality is essential for organizations aiming to streamline call processes, such as support lines, appointment notifications, or sales outreach, thus enhancing operational productivity and improving customer experiences. Twilio's Voice SDKs are compatible with multiple platforms, including Android, iOS, JavaScript, and React Native, enabling developers to create voice-capable applications that can operate across a variety of devices.

Connect with your customers like never before across all channels. With CPaaS and APIs for SMS, Voice, Video, and Verification, you can reach any mobile device globally in mere seconds. By effectively engaging your customers, you can significantly increase webshop orders, a fact proven by our collaboration with a leading telecommunications company that utilized a user-friendly online chatbot. Additionally, we assisted a prominent automotive firm in re-engaging potential buyers who had not responded to emails, leading to impressive results from their tailored Rich SMS campaign. Are your clients missing important appointments? Implementing engaging SMS reminders not only benefits them but also enhances your revenue streams. Trusted by developers worldwide, our solutions allow you to build with assurance and elevate your business using just a few lines of code. Strengthen your connection with customers and enhance their journey at every touchpoint, ultimately driving greater satisfaction and loyalty. Embrace this opportunity to transform your customer interactions and watch your business thrive.

Bird, previously known as MessageBird, represents the future of CRM tailored for Marketing, Sales, and Payments, facilitating more than 5 trillion messages each year across platforms like Email, SMS, and WhatsApp. Top brands efficiently enhance their growth through Bird by engaging in tailored interactions across these channels. Innovative organizations around the globe utilize Bird's robust applications and APIs to create effective communication solutions. Start your journey today and connect with your customers seamlessly across various channels, catering to diverse use cases regardless of location. You can send marketing messages, push notifications, order confirmations, delivery updates, and much more. If operational challenges are hindering your growth, leverage automated conversations and workflows to gather essential information upfront, minimize manual tasks, establish self-service options, and direct chats to the appropriate agents. With our dependable, auto-scaling APIs, you can quickly get started with extensive documentation, comprehensive API references, and user-friendly SDKs at your disposal. Experience the power of streamlined communication and watch your business thrive.

Provide prompt and tailored communication through international SMS/RCS and voice cloud services. Enhance your customer insights with actionable intelligence derived from global phone numbers and subscriber data. Utilize TeleSign’s Messaging API to code once and effectively reach your audience at scale, leveraging seamless delivery across various channels. The TeleSign Messaging API supports SMS, RCS, and WhatsApp, empowering you to create secure digital interactions that engage customers globally. By integrating a unified Messaging API, you can begin dispatching dependable and secure messages via SMS, RCS, and WhatsApp to your clientele today. Opt for one, two, or all three channels to diversify your programmable messaging approach and broaden your reach. With over 120 optimized points-of-presence and more than 700 direct-to-carrier routes, connect with an even larger customer base effortlessly. This expanded network ensures your messages are delivered efficiently and effectively.

DecisionTelecom is an international provider of Application-to-Person (A2P) messaging and voice communication solutions, delivering a comprehensive omnichannel platform for business messaging on a global scale. As a certified telecommunications operator, they maintain direct connections with mobile network operators, which facilitates the efficient delivery of messages in over 190 countries. Their extensive range of services encompasses SMS, Viber, WhatsApp Business messaging, RCS, and high-quality voice calls, all available through accessible APIs and SDKs that simplify integration with current systems. The goal of Decision Telecom is to improve and streamline interactions between businesses and their customers, offering 24/7 expert support along with tailored account management to guarantee dependable and effective service. By prioritizing user experience, they ensure that organizations can communicate effortlessly and effectively with their clientele.

Crafting Customer Journeys Through Meaningful Conversations. Delivering compelling experiences that align with your customers' needs. Favored by developers and designed for enterprises. Vonage Communications APIs (previously known as Nexmo) empowers emerging startups and nimble organizations to elevate customer interactions and achieve significant business results at scale. With our user-friendly APIs, comprehensive global platform, and dedicated support, you can simplify communication complexities and drive innovation at a quicker pace. Rethink voice communication to transform how your customers engage with your brand. Each message can become a pivotal moment for both your customers and your organization. Advance security and privacy measures while providing smooth login experiences. Develop contemporary, high-quality voice applications hosted in the cloud. Effortlessly send and receive SMS messages in nearly every nation worldwide. Access real-time insights on any phone number across the globe. Initiate and receive calls using your current VoIP system, all from the cloud, ensuring flexibility and efficiency. This holistic approach not only enhances user engagement but also fosters long-term relationships with your audience.

Numerous companies depend on our cloud communication platform to enhance their relationships with customers. This Communication Platform integrates cutting-edge technologies, offering a comprehensive solution that serves as a dependable resource for digital transformation and worldwide connectivity. You can send marketing promotions, push notifications, delivery confirmations, order updates, and conduct data surveys—essentially, anything you can envision. Leverage rich media chat and chatbots to empower your teams and meet every client's requirements at any time and from any location. You will have access to an extensive collection of API references, enabling you to customize and build workflows tailored to your needs. Moreover, you can safeguard user identities and accounts against online fraud with robust two-factor authentication and smooth verification processes. Ultimately, our platform ensures a seamless communication experience that drives engagement and fosters growth.