Tropo makes it simple to build phone, SMS and Instant messaging applications. You use the web technologies you already know and Tropo's powerful cloud API to bring real-time communications to your apps.

If you can create a web site, you can make and receive phone calls, use voice recognition, interact over SMS, IM, or Twitter. You can even create conference calls and transcribe calls. There's no need to learn new languages, wrestle with VoIP software, or learn about telephony. Host your code with us, or use your existing web server in the language of your choice.

Tropo adds a few simple communications commands to your favorite programming languages.

Ready to start coding? We've got lots of step by step quickstarts. Dive in with introductions on calling a phone number or accepting a call, sending text messages, receiving text through IM and SMS, and transferring and rejecting calls. Want to do more? We have lots of tutorials available.

If diving into sample code is more your thing, we've got sample apps in PHP, Ruby, Python, Groovy, and Javascript. Dig through the code for a voicemail system (complete with transcription), a weather forecast, or a local restaurant search that works over the phone, IM, and SMS. Call our demo numbers or try the code for yourself.