The symphony of success has been written for over 20 years! Rhythm is calling you! As a global brand with over 200 customers worldwide, Promena digitized all procurement processes end-to-end with its strategic solutions for more than 20 years. For a promising future. A procurement and supplier solutions platform, Promena was founded in 2001 with the partnership of Koç Holding and The Carlyle Group to provide companies with the top-flight of efficiency, active control, cost, time & labor savings in their procurement processes, integrating global and regional market knowledge with hi-tech. It has been operating under Zer Central Services and Trade A.Ş. a wholly-owned subsidiary of Koç Holding since 2013.