Company lists · Data verified August 2026

Top 25 Engineering consulting firms based in Bulgaria

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 140 companies tracked

There are 140 engineering consulting firms headquartered in Bulgaria (RevenueBase, August 2026). RevenueBase tracks 1,076 professional contacts across them, including 274 with verified work emails and 6 with mobile numbers. Sofia is the largest hub.

This list covers engineering consulting firms headquartered in Bulgaria, 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.

140Companies

1,076Contacts tracked

274Verified emails

6Mobile numbers

Unlock all 140 companies Free account · no credit card · 2 minutes

The 25 largest engineering consulting firms based in Bulgaria

Ranked by team size

Top 25 of 140 engineering consulting firms based in Bulgaria, 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	Filter Powering Industry	n/a	51-200	112	66
2	IPA	Sofia	51-200	110	71
3	Techno Engineering & Associates Group	Sofia	51-200	93	44
4	Trace Group Hold PLC	n/a	1,001-5,000	48	2
5	ACS Gruppe	Stara Zagora	51-200	28	15
6	Ircon LTD	n/a	11-50	26	7
7	GCR AD	Sofia	11-50	18	12
8	SM Engineering LTD	Sofia	11-50	17	4
9	GBS Global Construction EAD	Sofia	51-200	12	8
10	BS Konstructia	n/a	51-200	9	6
11	Krasenlach LTD	Sofia	11-50	9	5
12	Business Spector	Sofia	11-50	8	2
13	Fera Consultants	Sofia	1-10	7	5
14	Isomatech Engineering LTD	Sofia	1-10	7	2
15	EPG Eisenbahn- UND Bauplanungs-Gesellschaft MBH Erfurt	Sofia	11-50	6	3
16	Artstroy 1 Construction	Sofia	51-200	6	1
17	Softsim Consult LTD	Sofia	1-10	5	4
18	Fabex Bulgaria	Sofia City	1-10	5	3
19	IPS Bulgaria LTD	Sofia	11-50	3	3
20	NLV Engineering	Sofia City	1-10	3	1
21	AVV Constructions LTD	Sofia	11-50	2	1
22	Infra City Consult	Sofia	1-10	2	1
23	CES Clean Energy Solutions Bulgaria	Plovdiv	1-10	2	1
24	Ilpm-Bg	Sofia	1-10	2	1
25	Structuri Consult Engineering LTD	Sofia	1-10	2	1

Showing 25 of 140 engineering consulting firms based in Bulgaria

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 274 reachable decision-makers.

Free account · no credit card

See all 140 companies

Engineering consulting firms based in Bulgaria at a glance

As of Aug 28, 2026

1-10Median size (employees)

SofiaLargest hub · 64 HQs

6Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Engineering consulting firms by metro

Metro	Companies
Engineering consulting firms in Sofia	64
Engineering consulting firms in Sofia City	20
Engineering consulting firms in Varna	9
Engineering consulting firms in Plovdiv	9
Engineering consulting firms in Burgas	3
Engineering consulting firms in Stara Zagora	2
Engineering consulting firms in Sofiia Sofiia	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 Bulgaria.
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 Bulgaria?

There are 140 engineering consulting firms headquartered in Bulgaria as of August 2026 (RevenueBase).

What is the largest company on this list?

Filter Powering Industry, headquartered in Bulgaria, tops this list with the largest team on record.

Which city has the most engineering consulting firms?

Sofia leads with 64 headquartered companies, followed by Sofia City (20) and Varna (9).

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 274 verified decision-maker contacts tracked across these 140 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.

Ready to reach these companies? Verified emails and direct dials for all 140 engineering consulting firms based in Bulgaria. Start with a free account, no credit card.

Get the full list

Related lists

Engineering consulting firms by geography

Browse the directory

Browse: Companies home · All Bulgaria lists · All Engineering consulting firms lists · New lists

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.