32 years with you
guarantee of excellence IT solutions

System integration

System integration

Solutions backed by reputable manufactures



Servicing during the warranty period and afterwards

IT Sales

IT Sales

Find your optimal hardwer - "best buy"



Microsoft tehnical support

Zel-Cos is a proprietary company, established in 1991. and since then providing the best quality IT services to our customers. Through more then two decades we became the recognized brand on the Croatian IT market.

Zel-Cos consists of thirty or so IT experts that are constantly involved and fully aware of the so called lifetime learning programmes, to be able to fulfil the needs and expectations of our valued customers. Through our company business policy mechanisms we are trying to deploy and implement the „best buy“ and fully optimized IT solutions for our customers. For every deployed IT integrated system or solution, we are also offering the highest level support and maintenance. It is mainained through remotely connected sessions, or through onsite type of support, on customers premises if needed.


Check work order status

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Enter your receipt (just number without "Y" and year) number to check the status of your service request.

Receipt number is in the top right corner of the document that you received during receipt of work order.

Work order: *
Year: 2022 2023 *

System integrations

Starting a new business, or thinking of refreshing the information technology infrastructure, be sure to contact us and use our know-how and expertise. We will offer a high quality  services, hardware and solutions in full, which will help you optimize your business expenses.

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IT sales

With IT sales Zel-Cos is completing his offer as a leading IT service of equipment and estabilished system integrator. We met needs of our clients and trends in IT market. We adopt to needs of our clienst and some services we predefinied. 

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20 Jun 2023

Računala stvorena za poduzetnike. Sigurna i praktična, uz moćne alate za suradnju s kojima ćete svugdje biti produktivni. Jednostavno ih nosite sa sobom gdje...

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31 Mar 2023

HP+ su pametni pisači povezani s oblakom – ažurni, zaštićeni i spremni za ispis doslovce uvijek i s bilo kojeg mjesta.

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Continuous optimization of our own business potentials by offering the best quality IT solutions and products, together with the highest level of long term support to our customers.

By integrating the best IT solutions we are continuously adding the new value and improving our customers productvity and competitiveness on the market.


Ul. Grada Chicaga 28, HR-10000 Zagreb

T: +385 01 3033120

F: +385 01 3033130,, 

Zel-Cos d.o.o. electronic-information services and marketing, Nova cesta 166, 10000 Zagreb. Account number: 2360000-1101194923, IBAN: HR5323600001101194923 at Zagrebacka banka d. d., 2500009-1101365330, IBAN: HR3725000091101365330 at HYPO ALPE-ADRIA-BANK d.d. and
2340009-1110626430, IBAN: HR4523400091110626430 at Privredna banka Zagreb d.d. The share capital amounting to 149,000.00 HRK, paid in full. Director Dubravko Puhelek. Tax number: 03693350, OIB: 07306591551

How to file a complaint? / General Terms of Business / CID (Customer Induced Damage)

IKT integracija poslovnih procesa za rast konkurentnosti