Company lists · Data refreshed September 2026

Top 17 Legacy system modernization firms based in Zagreb, Croatia

RevenueBase identified 27 company matches for legacy system modernization firms associated with Zagreb, Croatia as of September 2026 and tracks 576 professional contacts across them, including 239 with verified work emails. Across Croatia, Zagreb is the largest hub for this category.

This list covers company matches for legacy system modernization firms associated with Zagreb, Croatia, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
27Companies
576Contacts tracked
239Verified emails
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The 17 largest legacy system modernization firms based in Zagreb, Croatia

Ranked by team size
Top 17 of 27 company matches for legacy system modernization firms based in Zagreb, Croatia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchZagreb, CroatiaHQ recorded Sep 28, 2026n/a158 contacts →

Exact match

“Beta Tau Beta or BTB focuses on delivering leading IT services to companies that have merged information technology into their business processes.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchZagreb, CroatiaHQ recorded Sep 28, 202651-200117 contacts →

Exact match

“Defining digital Our knowledge and technical expertise are groundwork for forming digital solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchZagreb, CroatiaHQ recorded Sep 28, 202651-200113 contacts →

Exact match

“Verso Altima Group (VAG) is a trusted ICT systems integrator and digital transformation partner delivering intelligent, secure, and automated technology solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-5034 contacts →

Exact match

“We integrate.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-5024 contacts →

Exact match

“Tvrtka Notus je IT tvrtka koja razvija i implementira cjelokupna poslovna rješenja kojima transformiramo poslovanje svojih klijenata.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-5017 contacts →

Exact match

“Leverage future-proof software, so you don’t just grow but lead.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“The core business of 3MI lab d.o.o.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-5012 contacts →

Exact match

“Appliment is a digital transformation & consulting company based in Zagreb, Croatia.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“Founded in 2007, Iteratio has been delivering innovative IT solutions for over a decade, turning IT challenges into opportunities.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchZagreb, CroatiaHQ recorded Sep 28, 2026201-5006 contacts →

Exact match

“Combis is one of the leading ICT company in the Adriatic region in the segment of services, established in 1990, and a member of HT Group since 2010.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-504 contacts →

Exact match

“Svi članovi tima doprinose rastu, razvoju i dugoročnom uspjehu naših klijenata.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchZagreb, CroatiaHQ recorded Sep 28, 20261-104 contacts →

Exact match

“Bitlight is an emerging company in the field of software solutions for process analysis, optimization and client outreach based in Zagreb, Croatia.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchZagreb, CroatiaHQ recorded Sep 28, 202611-503 contacts →

Exact match

“Digitalna transformacija počinje s ljudima – a mi smo tu da je učinimo mogućom.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchZagreb, CroatiaHQ recorded Sep 28, 20261-102 contacts →

Exact match

“Holisticware is an IT company from Zagreb, Croatia, founded in 2007-09 specialized in System and Software Design, Development and Integration.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchZagreb, CroatiaHQ recorded Sep 28, 20261-101 contacts →

Exact match

“Providing intellectual services and business consulting to our customers.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchZagreb, CroatiaHQ recorded Sep 28, 20261-101 contacts →

Exact match

“Our expertise lies in translating business processes into comprehensive IT solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchZagreb, CroatiaHQ recorded Sep 28, 20261-101 contacts →

Exact match

“We are a consulting company.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 17 of 27 legacy system modernization firms based in Zagreb, Croatia

See the full list, filter by size, metro and specialty, and access 239 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system modernization firms based in Zagreb, Croatia at a glance

As of Sep 28, 2026
41.5%Verified-email coverage
21.3Average contacts per company
11-50Median size (employees)
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
9
11-50
14
51-200
3
201-500
1

Email recency for this list is measured across the whole Croatia list rather than for Zagreb, so it is reported there. Company counts and contact totals on this page are exact for Zagreb, over 27 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Zagreb, Croatia whose business descriptions match “legacy system modernization firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 239 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “legacy system modernization firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system modernization firms are there based in Zagreb, Croatia?

RevenueBase identified 27 company matches for legacy system modernization firms associated with Zagreb, Croatia as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

BTB tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in Croatia has the most legacy system modernization firms?

Zagreb leads Croatia with 27 company records, followed by Osijek (2) and Kastav (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 239 professional contacts with verified work emails tracked across these 27 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.