Promena is a leading Procurement Technology company that focuses on enhancing efficiency and cost-effectiveness in purchasing activities. Established in 2001 through a partnership between Koç Holding of Turkey and the Carlyle Group of the United States, Promena aims to provide its clients with effective control over time, labour, and savings in the procurement process. Since 2013, the company has been operating under the umbrella of Zer Merkezi Hizmetler ve Ticaret A.S., a wholly-owned subsidiary of Koç Holding. With its innovative solutions, including e-Auction and e-Procurement, Promena has pioneered the "Strategic Sourcing Solutions" market in Turkey and its surrounding regions, establishing itself as a market leader in the sector.

Services include:
- e-Auction
- e-Procurement
- Strategic Sourcing Solutions
- Supplier Management
- Spend Analysis
- Contract Management

Promena continues to innovate and lead in the procurement technology space, offering tailored solutions that meet the needs of clients, particularly in the pharmaceutical industry. For more information, visit promena.net.