Company lists · Data refreshed September 2026

Top 25 Engineering consultancy companies based in Slovenia

Name: Engineering consultancy companies based in Slovenia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 68 companies tracked

RevenueBase identified 68 engineering consultancy companies headquartered in Slovenia as of September 2026 and tracks 646 professional contacts across them, including 349 with verified work emails and 6 with mobile numbers. Ljubljana is the largest hub.

This list covers engineering consultancy companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review

68Companies

646Contacts tracked

349Verified emails

6Mobile numbers

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The 25 largest engineering consultancy companies based in Slovenia

Ranked by team size

Top 25 of 68 engineering consultancy companies based in Slovenia, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to engineering consultancy companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Elea IC D.O.O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	51-200	90 contacts →
	Indirect evidence “Elea iC is one of the largest interdisciplinary providers of intellectual services in Slovenia.” Source: RevenueBase Database · checked Sep 24, 2026
2	IBE D.D	Partial evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	51-200	58 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 24, 2026
3	DRI Upravljanje Investicij, D. O. O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	201-500	57 contacts →
	Indirect evidence “DRI upravljanje investicij, d.” Source: RevenueBase Database · checked Sep 24, 2026
4	Lineal D.O.O	Indirect evidence	Maribor, SloveniaHQ checked Sep 24, 2026	51-200	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026
5	PNZ D.O.O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	11-50	29 contacts →
	Indirect evidence “SINCE 1953 PNZ is one of the leading project design companies in Slovenia.” Source: RevenueBase Database · checked Sep 24, 2026
6	GIC Gradnje	Indirect evidence	Rogaška Slatina, SloveniaHQ checked Sep 24, 2026	51-200	29 contacts →
	Indirect evidence “GIC GRADNJE is a contemporary construction company which has successfully been presenting itself on the Slovene market in the last 33 years.” Source: RevenueBase Database · checked Sep 24, 2026
7	HSE Invest D.O.O	Partial evidence	Maribor, SloveniaHQ checked Sep 24, 2026	51-200	23 contacts →
	Partial evidence “Excellent in consulting, engineering and construction.” Source: RevenueBase Database · checked Sep 24, 2026
8	Rudis D.O.O. Trbovlje	Partial evidence	Trbovlje, SloveniaHQ checked Sep 24, 2026	51-200	17 contacts →
	Partial evidence “Rudis is the leading engineering company in Slovenia, specialized in contracting engineering in the field of energetics, ecology, industry and special technologies.” Source: RevenueBase Database · checked Sep 24, 2026
9	Elsing D.O.O	Partial evidence	Ljubljana Črnuče, SloveniaHQ checked Sep 24, 2026	11-50	17 contacts →
	Partial evidence “Elsing is an engineering company providing consulting, contracting and maintenance services since 1993.” Source: RevenueBase Database · checked Sep 24, 2026
10	CBE D.O.O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	51-200	15 contacts →
	Indirect evidence “Ustvarjanje učinkovitih inženirskih rešitev je naša strast.” Source: RevenueBase Database · checked Sep 24, 2026
11	Diming, Inženiring In Projektiranje D.O.O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	11-50	15 contacts →
	Indirect evidence “Smo mlado in hitro rastoče podjetje, ki s svojim znanjem in profesionalnim odnosom opravljamo kakovostne storitve.” Source: RevenueBase Database · checked Sep 24, 2026
12	Savaprojekt D.D	Partial evidence	Krško, SloveniaHQ checked Sep 24, 2026	51-200	13 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 24, 2026
13	Sipro Inženiring D.O.O	Partial evidence	Krsko, SloveniaHQ checked Sep 24, 2026	11-50	12 contacts →
	Partial evidence “SIPRO Inženiring (SIPRO Engineering) provides design, engineering, consulting, supervision, and site services in the fields of nuclear power generation, as well as other power…” Source: RevenueBase Database · checked Sep 24, 2026
14	Ipmit D.O.O	Partial evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	11-50	8 contacts →
	Partial evidence “We are a business and information technology consulting and engineering company that combines unparalleled experience and comprehensive capabilities across multiple business…” Source: RevenueBase Database · checked Sep 24, 2026
15	Geoinženiring	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	11-50	8 contacts →
	Indirect evidence “In taking a fully integrated and holistic approach to investigating and evaluating geotechnical, geological and environmental factors influencing ground related risks we are able…” Source: RevenueBase Database · checked Sep 24, 2026
16	Ac&p Inženirski Biro D.O.O	Indirect evidence	Ajdovščina, SloveniaHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “We are a company specializing in the planning of complex infrastructure and other projects requiring an intensive multidisciplinary approach.” Source: RevenueBase Database · checked Sep 24, 2026
17	Gradis, BP Maribor D.O.O	Partial evidence	Maribor, SloveniaHQ checked Sep 24, 2026	11-50	5 contacts →
	Partial evidence “Civil engineering company based in Maribor, Slovenia.” Source: RevenueBase Database · checked Sep 24, 2026
18	IEM Inženiring In Projektiranje D.O.O	Partial evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	1-10	5 contacts →
	Partial evidence “IEM Engineering and planning Ltd, is one of the oldest engineering, consulting and planning companies in Slovenia.” Source: RevenueBase Database · checked Sep 24, 2026
19	Proinfra D.O.O	Indirect evidence	Maribor, SloveniaHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Podjetje se ukvarja z izdelavo projektne dokumentacije, prometnih in okoljskih študij, svetovalnega inženiringa in strokovnega nadzora na področju inženirskih objektov.” Source: RevenueBase Database · checked Sep 24, 2026
20	Megalit D.O.O	Indirect evidence	Poljčane, SloveniaHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “infrastructure project design” Source: RevenueBase Database · checked Sep 24, 2026
21	Sloman D.O.O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “SUPERVISION Transport infrastructure (roads, railways, ports, airports) Communal infrastructure Water and water management infrastructure High-rise buildings (public buildings and…” Source: RevenueBase Database · checked Sep 24, 2026
22	Spektral Engineering	Partial evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	1-10	3 contacts →
	Partial evidence “The structural engineering and consulting company Spektral was established with the aim of introducing advanced solutions for structural design and seismic engineering into the…” Source: RevenueBase Database · checked Sep 24, 2026
23	Corus Inženirji D.O.O	Indirect evidence	Šempeter Pri Gorici, SloveniaHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “We are a leading construction company specializing in an integrated approach to the design of building structures, building control, geological geomechanical surveys, high-rise…” Source: RevenueBase Database · checked Sep 24, 2026
24	Studio 20-20	Indirect evidence	Kranj, SloveniaHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “Studio 20-20 is a design company of architects and engineers that offers consulting, project management and BIM related services.” Source: RevenueBase Database · checked Sep 24, 2026
25	Hidroinzeniring D.O.O	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 24, 2026	11-50	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: engineering consultancy companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names engineering consultancy companies.
Partial evidence: Its own public description names part of engineering consultancy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering consultancy companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 68 engineering consultancy companies based in Slovenia

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Engineering consultancy companies based in Slovenia at a glance

As of Sep 24, 2026

54.0%Verified-email coverage

0.9%Mobile-number coverage

9.5Average contacts per company

1-10Median size (employees)

38.2%Largest-city concentration · Ljubljana

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

2660–30

7931–60

461–90

090–180

0180+

Company record updated

Median 89.0d

00–30

12331–60

30861–90

19790–180

18180+

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 engineering consultancy companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Slovenia whose own description of what they do matches “engineering consultancy companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names engineering consultancy companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among engineering consultancy companies, 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 its RevenueBase Smart Search 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, 349 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 24, 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

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names engineering consultancy companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many engineering consultancy companies are there based in Slovenia?

RevenueBase identified 68 engineering consultancy companies 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 engineering consultancy companies?

Ljubljana leads with 26 headquartered companies, followed by Maribor (8) and Kranj (3).

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 349 verified decision-maker contacts tracked across these 68 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 24, 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 Smart Search, 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.