KAPSYSTEM!

Twilio is a web-service API that lets you use your existing web languages and skills to build voice and SMS applications. We focus on building a simple, powerful, pay-as-you-go communications platform so that you can focus on what you do best.

An simple text message API.

textPlus is the best way to send unlimited text messages from your android, iPhone, iPod, kindle, and windows devices with your textPlus phone number free and calling for just pennies.

Nexmo provides innovative communication APIs that bridge traditional voice and text services with cloud communications.

Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:

Plivo is a voice and SMS API platform that enables developers and enterprises to build powerful apps with great features. With 24/7 free tech support and low prices, Plivo can help your business scale globally.

Talkatone gives you free calls, text messages, real-time location sharing and picture sharing to Facebook and Google friends, or any phone number in US.

Send unlimited FREE Text Messages to any mobile phone in the world. Enter your phone number below and we will send you a message with a link to our service.

Instantly send text messages online.

This RESTful API is a modern API that lets you use the message services provided by iP.1 Networks AB via your own applications. Do everything from just sending SMS messages to managing contacts and sending surveys.

Spring Edge is one of the premier business communication solutions provider, Spring Edge's core services includes messaging and voice communications with comprehensive and customized platform for all business scales.

SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging. We've taken care of all the complicated details and harnessed the sophisticated technology necessary to bring you a simple solution for sending SMS text messages from a web or desktop application.

Program for sending SMS over the Internet. It uses publicly available web gateways and sends messages through them. This way it can be much more comfortable than using a web browser or a mobile phone.

JaxtrSMS lets you send FREE SMS / text messages to any mobile phone in the world.Best of all, the receiver does not have to have the JaxtrSMS app.International and local SMS/texting can be expensive but with JaxtrSMS you can text anyone in the world for FREE! All you need to do is download JaxtrSMS and start sending messages. JaxtrSMS links directly to your address book so you can send messages to anyone whether they have JaxtrSMS or not.There is no limit to the number of messages you can send.

The leading solution for text message and call verification. Build your SMS & VoIP applications with one easy API. Try it for free