Best Voice Calling API & SDK Providers for Intercom

ClickSend: A simple, battle-tested SMS API built for developers. Ship messaging features in minutes with a clean API, reliable infrastructure and zero lock-ins. Why devs and sysadmins trust us: - Direct carrier routes to 190+ countries — no middleman - 99.95%+ uptime, low latency, high throughput - Billions of messages delivered globally - Pay-as-you-go pricing — no contracts - 24/7 support from people who actually understand APIs Works the way you code: Integrate via REST API, use pre-built SDKs (PHP, Python, Ruby, Node.js, C#), or trigger via webhooks. Already using Zapier, Make, or Power Automate? We've got you covered with pre-built integrations ready to go. It works straight out of the box — and keeps working when you scale from 100 to 100 million messages. No lock-ins. No fuss. Just reliable SMS infrastructure you can trust. Perfect for: 2FA, alerts, monitoring notifications, transactional messaging, user onboarding flows and anything else that needs to reach people fast.

CometChat is a live chat platform that allows users to collaborate and connect with customers. Developed with API and Chat SDK, CometChat can be deployed on-premise and cloud. The solution enables users to video, text and voice chat with the customers, share pictures via broadcast videos, play games and use whiteboards. Primary features of CometChat include WebRTC, file sharing, screen sharing, real-time language translation, customization for layouts, languages and colors, typing indicators, last-seen notifications, read receipts, emojis and stickers. The platform also allows users to switch from text chatting to a video chatting interface. Additional services of CometChat include broadcast messages, guest login support, earlier messages, blocking or unblocking users, video broadcasting and voice notes. Pricing of the product is based on monthly active users and support is extended via email and phone.

Incorporate real-time voice, video, messaging, and additional features into your VoIP, web, and mobile applications without any upfront capital expenditures, contracts, or long-term commitments; simply pay as you expand and enjoy complete creative freedom. Apidaze’s Voice APIs facilitate seamless handling of both inbound and outbound calls, eliminating the need for cumbersome phone systems or extensive agreements with major carriers. With access to phone numbers spanning over 8,000 cities across 60 countries, Apidaze empowers you to craft straightforward interactive voice responses without relying on traditional phone infrastructure. You can set up a welcoming message for callers and direct their calls based on their selections, enhancing customer experience. Moreover, considering that 6 billion SMS messages are sent daily in the US, text messaging has rapidly become a vital channel for maintaining connections with your clientele. This versatility ensures that businesses can engage with their customers effectively and efficiently across various platforms.

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.