Avantstar is a software company that provides content management and content transformation solutions to businesses across various industries. Founded in 2001 and headquartered in Chanhassen, Minnesota, Avantstar's flagship product is Quick View Plus, a universal file viewer that allows users to view, print, and email hundreds of different file formats without the need to have the native applications installed.

Their products are designed to help organizations manage, exchange, and disseminate information faster and more cost-effectively. They serve a wide range of sectors including legal, government, and manufacturing industries.