AUTHORIZED SERVICE

ovlasteniservis

Dear users, due to the large number of phone calls, we are not able to answer all of them, the main reason is that most of the calls ask questions that belong to the sphere of the Help-desk (Technical Support) and require a longer time for a quality answer about technical settings such as software- as well as hardware, and in this way valuable time is taken away from service reception operators who cannot devote themselves to the basic work, which is receiving and issuing devices for service.

More details about the current situation, location of the service, and how to get there can be found here: FAQ

Zel Cos B2B 800x800

System integration

System integration

Solutions backed by reputable manufactures

Service

Service

Servicing during the warranty period and afterwards

IT Sales

IT Sales

Find your optimal hardwer - "best buy"

Microsoft

Microsoft

Microsoft tehnical support

26 May 2026

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Mnoge tvrtke smatraju da je pad IT sustava samo kratkotrajna neugodnost.

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Servis računala za poslovne korisnike – što očekivati

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Checklist za otvaranje novog ureda (IT infrastruktura)

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Microsoft 365 ili lokalni server – što odabrati?
05 May 2026

Microsoft 365 ili lokalni server – što odabrati?

Tvrtke koje moderniziraju svoju IT infrastrukturu često se susreću s važnim pitanjem: treba li koristiti Microsoft 365 u cloudu ili postaviti lokalni server u...

ZelCos Grenke

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. Construction and maintenance of computer systems.

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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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Zanimljive činjenice o nama
35
Godina poslovanja
420.000
Servisnih zahvata
30
Stručnih zaposlenika
1.580
Zadovoljnih poslovnih korisnika
40+
Implementiranih IT sustava

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