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

Zašto redovno održavanje IT opreme produžava vijek računala i servera
03 Feb 2026

Zašto redovno održavanje IT opreme produžava vijek računala i servera

U poslovanju gdje je svaka minuta važna, pouzdana IT oprema temelj je produktivnosti i sigurnosti. No, koliko često razmišljamo o njenom održavanju?

Cloud ili lokalni server – što je isplativije za vaše poslovanje?
27 Jan 2026

Cloud ili lokalni server – što je isplativije za vaše poslovanje?

Jedno od najčešćih pitanja koje tvrtke postavljaju pri planiranju IT infrastrukture glasi: „Trebamo li ulagati u vlastiti server ili prijeći na cloud?”

Kako optimizirati IT infrastrukturu bez velikih ulaganja
20 Jan 2026

Kako optimizirati IT infrastrukturu bez velikih ulaganja

U svijetu u kojem se tehnologija razvija brže nego ikad, mnoge male i srednje tvrtke suočavaju se s istim izazovom: kako modernizirati IT sustav bez velikih...

Cyber prijetnje koje najčešće pogađaju hrvatske tvrtke
13 Jan 2026

Cyber prijetnje koje najčešće pogađaju hrvatske tvrtke

Kibernetička sigurnost više nije tema rezervirana za velike sustave i državne institucije – danas je svaka tvrtka potencijalna meta napada. Prema podacima...

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