What are some greeting card companies you can write for?

Im looking for jobs writing for greeting card companies and I know the biggest chain is Hallmark however they dont have any opportunities for creative writing jobs. I just wanted to know what other chains there are besides Hallmark so I can check them out. I've looked but I can only seem to find these websites that aren't a brand like Hallmark are they just deal with all kinds of brands because their just a card shop. Does any one know any others besides Hallmark?