With texting, both parties need to use their cellphones and they must also know the recipents cell phone number.
ChatToText allows anyone on a computer the ability to chat with you directly from their computer. They don't even need a cell phone or know your phone number. (Not all your social networking friends know your cell number.)
Additionally, you have a link you can post anywhere so visitors can start a chat with you anywhere. You can put the link on your webpage profie page or even in e-mails