About Zer

Zer started its activities as a Koç Group company in 2003. Our company carries out its work with a vision of ‘’being Turkey’s best, and the World’s leader in strategic procurement and efficiency.’’

At Zer, we have managed the purchasing system of thousands of companies since the day we were founded, building up our expertise across sectors, developing our experience in purchasing processes, gathering our expert staff in the field as well as the practices we have developed using the newest technologies. With our purchasing experience of over 15 years, we have ensured that both our customers and suppliers save on cost and time.

Purchasing Outsourcing Services (BPO-Business Process Outsourcing);

proceed with a planning, based on the purchase categories after all analysis of spend data. Customers have the option to transfer entire purchase processes to Zer or to outsource services partially.

  • Strategic Sourcing (Source to Procure),
  • Operational Sourcing (Procure to Pay),
  • Strategic and Operational Sourcing (Source to Pay)
In 2018, Zer provided services to many companies outside of Koç Group with significant advantages in procurement categories s uch as packaging materials, non-hazardous wastes, industrial catalogs, sea transportation etc.

Purchasing Technology Services (Promena);

new version of the strategic sourcing suit developed under the Promena brand has been completed. Promena software 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 crea te operational efficiency, financial savings and accountability on customer side.

  • E-Procurement (Catalog, Requisition and PO Management)
  • Supplier Relationship Management
  • E-Sourcing Management (RFI-RFQ-Auction)
  • Spend Analysis

Zer has set its digital transformation and innovation activities as a priority area for competitive advantage. And from now o n; the main goal of Zer is to become a global purchasing outsourcing company with a business model that benefits all customers and solution partners.

About Promena

Promena was founded in 2001 by Koç Holding (Turkey) and Carlyle Group (USA) with the aim of providing high efficiency and effective control of time, labor and cost savings to its customers in their purchasing activities with top technology.

Since 2013, Promena has combined its resources with Zer, which is a fully owned subsidiary of Koç Holding. With its innovative solutions such as e-Sourcing, e-Procurement, Supplier Relationship Management and Spend Analysis, Promena has created the “Strategic Sourcing Solutions” market in Turkey and surrounding regions and is firmly established as the market leader of its sector.

In the recent years, Promena has been increasing its global footprint of new customers and resellers all over the world.

The Leadership Team


Our Strategic Procurement Solution Promena was included in Capgemini's 2020-2021 Digital Procurement Research

The only Turkish Strategic Sourcing Platform listed in SpendMatters Almanac listing.

A recognized Customer Leader in SpendMatters SolutionMap.

One of the 50 Providers listed in 2020 SpendMatters 50 to Watch List

Placed in the top 3 vendors for Sourcing, Procurement and Auction Categories. 

One of the top 3 Strategic Sourcing Platforms