Ünalan Mahallesi Çağla Sokak Koç Grubu Apt. No:11/A | Üsküdar, İstanbul | 34700 Turkey
+90 216 556 3061
Provides solutions and/or services in the following categories:

Promena, Strategic Sourcing Platform and Services; is the technology brand of Zer (, which is central procurement company of Koç Group (, founded in 2003. Zer accelerates its growth by offering procurement experience to its both Koç and Non-Koç clients, which has been gained for more than 15 years. This growth is achieved through net gain and efficient procurement processes provided to clients.

Main activities of Zer can be grouped under two fields as “Purchasing Outsourcing Services” and “Promena Strategic Sourcing Platform and Services”. With these activities, Zer performs services offered by similar companies operating in the global arena, with local supplier information and maximizes the benefits, provided to its customers.

Promena is used in the purchasing processes of many companies and together with the transition to cloud, our services have become available worldwide.

Below mentioned Promena modules create operational efficiency, financial savings and accountability on customer side.
• Catalog, Requisition and PO Management
• Supplier Relationship Management
• E-Sourcing Management (RFI-RFQ-Auction)
• Spend Analysis

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