Best Voice Calling API & SDK Providers for Facebook Messenger

Use the language you already love to prototype ideas quickly, develop production-ready communications applications, and run serverless applications on one API-powered platform. Twilio is a single fully-programmable platform with flexible APIs for any channel, built-in intelligence, and global infrastructure to support you at scale. Quickly integrate powerful APIs to start building solutions for SMS and WhatsApp messaging, voice, video, and email. Browse documentation and SDKs in multiple coding languages, including Ruby, Python, PHP, Node.js, java, and C#, or jumpstart your first project with our open source code templates to quickly build production-ready communications apps. Consult our community of over 9 million developers for guidance and inspiration on your next project. Sign up and start building today.

ClickSend offers SMS, MMS, Voice, Online Mail, Email and Fax software for businesses. Our communications and messaging tools are simple to use, automate and integrate. That’s why they’re used by some of the most trusted brands, organisations and developers globally. Built for all, you can access ClickSend via our Dashboard, mobile app, flexible API or 900+ integrations. Plus, ClickSend offers helpful 24/7 support, and lightning fast delivery via a secure and reliable platform. From SMS marketing and alerts to bulk mailouts sent from your browser, join over 90,000+ businesses sending communications around the world. Our 100% uptime guarantee and lightning fast direct routes provide reliable messaging, no matter the channel. From small businesses to enterprise, ClickSend powers billions of messages around the world with 232+ direct carrier connections. Plus, ClickSend is always pay-as-you-go. That’s why ClickSend is business communications, solved.

Engage customers like never before, on any channel. CPaaS, APIs for SMS Voice, Video, and Verification. In seconds or less, reach every mobile phone in the world. Engaging customers in the right way can help increase your webshop orders by more than just doubling. We're experts in this field. A major telco company was able to do exactly that using an online chatbot. We assisted a major automative company to re-engage and convert end of funnel prospects who were not responding to emails. The personalized Rich SMS campaign's results speak for themselves. Are your customers missing important appointments? SMS reminders can help you and your customers increase revenue. Trusted by developers all over the globe. With just a few lines code, you can build confidence and boost your business. Connect with your customers and add value every step of their journey.

Our cloud communications platform is used by thousands of businesses to strengthen their relationships with customers. Communication Platform is a trusted tool for global connectivity and digital transformation. It supports the most innovative technologies around the globe and combines all options. You can send push notifications, delivery alerts and order updates. Rich media chat and chatbots can be used to empower your team and cater to all client's needs, anywhere and anytime. Access a large library of API references to build your workflows however you like. Secure 2-factor authentication and seamless verification can help protect user identities and accounts from online fraud.