Textalert.com, an online service for sending promotional and marketing text messages to customers, has launched. Textalert.com is an SMS marketing solution designed for small-medium businesses, with simplicity in mind. Having collected customer's mobile phone numbers, users of Textalert.com enter the message, input the numbers of their customers into an online address book, and click send. The service operates on a pre-paid credits system and there are no sign-up or subscription charges. No additional software is required to use the system, which can be accessed from any internet connected PC. Furthermore, Textalert.com is enabled to send messages through all major US carriers.