Sato is a Finnish housing company that owns over 25,000 rental homes. In 2014, Sato's procurement process was decentralized without e-procurement tools. Since implementing the Proteus procurement system in mid-2015, Sato has integrated it with their IFS accounting, OpusCapita invoice processing, and ERP systems. This has automated invoice matching from purchase to pay. Sato spends around 190 million euros annually on procurement and sees analytics and automated tendering tools as areas for future development to further improve their e-procurement process.