Yes, RelayThat is a legitimate company. It is a graphic design software that has received positive reviews from users. It is praised for its ease of use and the ability to resize complex designs for every channel with a single click. Users have reported that it saves them a lot of time in creating graphics for various ad formats. However, like any software, it may have its limitations and it's always recommended to do your own research or try a free trial if available before making a purchase.