A common sight on the web is the trends in web design that leads to websites that look similar to each other. Sometimes they tend to look REALLY similar. I have had clients that wanted to use design as inspiration from another site and i’ve done those projects to, but only as a developer instead of a designer. I don’t know how GoAssign decided to design their website, but I guess we can all agree on who they have been inspired by.
Campaign Monitor have been a well-known website for its design for some time now so there’s no question about “who was first”.