CafePress Inc., an online retailer of customized products, has bought EZ Prints Inc., which also enables online shoppers to add their photos to mugs, canvas and other items. In an announcement today, CafePress says it will pay $30 million in cash for all outstanding EZ Print stock.

CafePress is No. 112 in the Internet Retailer Top 500 Guide.

The retailer says the transaction will close within 45 days. CafePress says that EZ Print owns  “deployable software technology that enables the CafePress ecosystem to drive online customization by further extending its reach into third party corporate and licensed shops.”

“We have seen strong growth in our large corporate shops business and the addition of EZ Prints to CafePress brings a robust, deployable, cloud-based software solution that accelerates CafePress’ vision of enabling customization for corporate partners across the web,” says CafePress CEO Bob Marino. “Along with technology, we believe this transaction will enhance revenue and add scale to our business, and the combined organization will amass significant brand power. We look forward to working with the talented EZ Prints team to capitalize on the tremendous customization opportunities within e-commerce.” “Cloud-based” refers to  software hosted on the Internet.

Earlier this year, CafePress launched a mobile site.