Company lists · Data verified August 2026

Top 25 Engineering consulting firms based in Slovenia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 74 companies tracked

There are 74 engineering consulting firms headquartered in Slovenia (RevenueBase, August 2026). RevenueBase tracks 686 professional contacts across them, including 352 with verified work emails and 10 with mobile numbers. Ljubljana is the largest hub.

This list covers engineering consulting firms headquartered in Slovenia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

74Companies

686Contacts tracked

352Verified emails

10Mobile numbers

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The 25 largest engineering consulting firms based in Slovenia

Ranked by team size

Top 25 of 74 engineering consulting firms based in Slovenia, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Elea IC D.O.O	Ljubljana	51-200	89	74
2	IBE D.D	Ljubljana	51-200	60	46
3	DRI Upravljanje Investicij, D. O. O	Ljubljana	201-500	58	40
4	BEXEL	Ljubljana	51-200	33	23
5	PNZ D.O.O	Ljubljana	11-50	29	16
6	HSE Invest D.O.O	Maribor	51-200	23	16
7	Štajerski Inženiring D.O.O	Maribor	11-50	20	12
8	Elsing D.O.O	Ljubljana Crnuce	11-50	18	14
9	Rudis D.O.O. Trbovlje	Trbovlje	51-200	17	15
10	Diming, Inženiring In Projektiranje D.O.O	Ljubljana	11-50	15	11
11	CBE D.O.O	Ljubljana	51-200	15	10
12	OK Zt-Gmbh	Ljubljana Laibach	11-50	12	11
13	Savaprojekt D.D	Krsko Krsko	51-200	12	10
14	Sipro Inženiring D.O.O	Krsko	11-50	11	10
15	Ipmit D.O.O	Ljubljana	11-50	8	5
16	Geoinženiring	Ljubljana	11-50	8	3
17	Ac&p Inženirski Biro D.O.O	Ajdovscina	1-10	6	6
18	Gradis, BP Maribor D.O.O	Maribor	11-50	5	4
19	Simbased	n/a	1-10	5	4
20	IEM Inženiring In Projektiranje D.O.O	Ljubljana	1-10	5	2
21	Megalit D.O.O	Poljcane	1-10	4	3
22	Proinfra D.O.O	Maribor	1-10	4	3
23	Sloman D.O.O	n/a	1-10	4	2
24	Spektral Engineering	Ljubljana	1-10	3	3
25	Studio 20-20	Kranj	1-10	3	1

Showing 25 of 74 engineering consulting firms based in Slovenia

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Engineering consulting firms based in Slovenia at a glance

As of Aug 28, 2026

1-10Median size (employees)

LjubljanaLargest hub · 28 HQs

10Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Engineering consulting firms by metro

Metro	Companies
Engineering consulting firms in Ljubljana	28
Engineering consulting firms in Maribor	8
Engineering consulting firms in Trbovlje	3
Engineering consulting firms in Nova Gorica	2
Engineering consulting firms in Celje	2
Engineering consulting firms in Kranj	2
Engineering consulting firms in Ribnica	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “engineering consulting firms”, with match quality audited by blind human judging, and headquartered in Slovenia.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many engineering consulting firms are there based in Slovenia?

There are 74 engineering consulting firms headquartered in Slovenia as of August 2026 (RevenueBase).

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 consulting firms?

Ljubljana leads with 28 headquartered companies, followed by Maribor (8) and Trbovlje (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 352 verified decision-maker contacts tracked across these 74 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.