Company lists · Data refreshed September 2026
Top 16 Infrastructure consulting firms based in Slovenia
RevenueBase identified 32 infrastructure consulting firms headquartered in Slovenia as of September 2026 and tracks 441 professional contacts across them, including 269 with verified work emails and 4 with mobile numbers. Ljubljana is the largest hub.
This list covers infrastructure consulting firms headquartered in Slovenia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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.
The 16 largest infrastructure consulting firms based in Slovenia
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 89 | ||||
“Elea iC is one of the largest interdisciplinary providers of intellectual services in Slovenia.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 73 | ||||
“KPMG has been present in Slovenia for almost 30 years.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 60 | ||||
“In IBE we see our mission as providing CONSULTING, DESIGN and ENGINEERING services in the areas of ENERGY, INDUSTRY, INFRASTRUCTURE, PUBLIC and COMMERCIAL SECTOR and ENVIRONMENTAL…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 58 | ||||
“DRI upravljanje investicij, d.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 29 | ||||
“SINCE 1953 PNZ is one of the leading project design companies in Slovenia.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 23 | ||||
“Excellent in consulting, engineering and construction.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 13 | ||||
“Since 1997, we have been helping telecom operators, utility companies, and municipalities to optimize and transform their network infrastructure data with speed and accuracy.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 12 | ||||
“Company for Development, Planning, Consulting and Engineering Savaprojekt is one of the few companies in Slovenia with its own professionals to provide investors with…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 8 | ||||
“We are a business and information technology consulting and engineering company that combines unparalleled experience and comprehensive capabilities across multiple business…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 5 | ||||
“Civil engineering company based in Maribor, Slovenia.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 4 | ||||
“infrastructure project design” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 4 | ||||
“Podjetje se ukvarja z izdelavo projektne dokumentacije, prometnih in okoljskih študij, svetovalnega inženiringa in strokovnega nadzora na področju inženirskih objektov.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 4 | ||||
“SUPERVISION Transport infrastructure (roads, railways, ports, airports) Communal infrastructure Water and water management infrastructure High-rise buildings (public buildings and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | Hidroinzeniring D.O.OIndirect evidence | 2 | |||
Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | Heptagon EngineeringPartial evidence | 1 | |||
“Engineering, Design, Consulting and Supervision” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 1 | ||||
“BCE consulting and engineering offers consulting and engineering services for the railway sector, specialising in the fields of railway signalling and telecommunications.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 16 of 32 infrastructure consulting firms based in Slovenia
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Infrastructure consulting firms based in Slovenia at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among infrastructure consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- 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
- Companies headquartered in Slovenia whose own description of what they do matches “infrastructure consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among infrastructure consulting firms, and records with no verified work email. Companies headquartered outside Slovenia are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 269 across the full list. 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 3, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
How many infrastructure consulting firms are there based in Slovenia?
RevenueBase identified 32 infrastructure consulting firms headquartered in Slovenia as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Elea IC D.O.O, headquartered in Ljubljana, tops this list with the largest team on record.
Which city has the most infrastructure consulting firms?
Ljubljana leads with 13 headquartered companies, followed by Maribor (5) and Kamnik (1).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 269 verified decision-maker contacts tracked across these 32 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 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.
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