Tropo is cloud-based communications. Build applications for voice, SMS, and IM with one simple API.

Host on our cloud using a variety of languages, or use our new Tropo Web API and build your app anywhere on the web with any programming language. You can create multi-party conferences, use speech recognition and text-to-speech, call using Skype or SIP and so much more - all powered by Voxeo - the largest and most reliable hosted communications platform in the world.

Twilio provides a web-service API for business to build scalable, reliable communications apps that makes and receive...

We're always building web applications, and sometimes we want those apps to be able to interact with phone callers. Maybe we want a customer to be able to call in and get information, or maybe we need to coordinate our employees more efficiently. Before Twilio, you would have had to learn some foreign telecom programming languages, or set up an entire stack of PBX software to do this. At which point, you'd say 'aw, forget it!' Twilio lets you use your existing web development skills, existing code, existing servers, existing databases and existing karma to solve these problems quickly and reliably. We provide the infrastructure, you provide the business logic via HTTP, and together we rule the world.

Easy Group SMS Messaging

Reach your audience instantly, Setup and Manage it yourself, Use your cell as a marketing tool

Cloudvox is the most practical, stable, open environment for API-driven phone calls.

Cloudvox shuttles phone calls to and from your applications, exposing call control 'building blocks' to your HTTP (JSON) or Asterisk (AGI, SIP) app. Apps can be hosted on any Web or app server. They interact with Cloudvox via easy open-source libraries (like Adhearsion, Asterisk-Java, PHP-AGI, or simple JSON) and common protocols (HTTP or Asterisk).