Company lists · Data verified August 2026

Top 25 Ecological consulting firms based in Belgium

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 120 companies tracked

There are 120 ecological consulting firms headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 914 professional contacts across them, including 460 with verified work emails and 24 with mobile numbers. Brussels is the largest hub.

This list covers ecological consulting firms headquartered in Belgium, 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.

120Companies

914Contacts tracked

460Verified emails

24Mobile numbers

Unlock all 120 companies Free account · no credit card · 2 minutes

The 25 largest ecological consulting firms based in Belgium

Ranked by team size

Top 25 of 120 ecological consulting firms based in Belgium, 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	Trevi NV	Grobbendonk	51-200	101	82
2	Agriconsulting	Brussels	51-200	87	19
3	RSK Benelux BV	Westerlo	51-200	86	68
4	Tauw Belgium	Leuven Wijgmaal	51-200	80	50
5	Consultes	Antwerp	11-50	34	29
6	Geolys	n/a	11-50	32	26
7	RDC Environment	Bruxelles	11-50	31	24
8	ORA Group	Wevelgem	11-50	26	20
9	Vitis Regulatory	Etterbeek Brussels	11-50	21	17
10	Research And Solutions	Strombeek-Bever	11-50	21	1
11	Milvus Consulting NV	Gent	11-50	17	12
12	Ecofirst SC	n/a	11-50	15	1
13	Landmax	Beringen	11-50	13	6
14	Advista	Louvain-La-Neuve Bruxelles	1-10	13	6
15	AG Environnement	n/a	11-50	13	5
16	21solutions	Brussels Brussels	1-10	10	10
17	Adviesbureau Decock	n/a	11-50	9	9
18	Creafarm BV	Roeselare	11-50	7	7
19	Wascos Sprl	Ecaussinnes	1-10	7	1
20	Mieco-Effect BV	Diest	11-50	6	5
21	Ecoscan	n/a	1-10	6	4
22	SBS Environnement Sprl	Chaudfontaine	1-10	6	2
23	Bureau DW Bvba	Geel	1-10	5	5
24	Profish Technology	Naninne	1-10	5	2
25	Biotoop Ecologische Inrichting	Balen	1-10	5	2

Showing 25 of 120 ecological consulting firms based in Belgium

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 460 reachable decision-makers.

Free account · no credit card

See all 120 companies

Ecological consulting firms based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 8 HQs

24Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Ecological consulting firms by metro

Metro	Companies
Ecological consulting firms in Brussels	8
Ecological consulting firms in Liege	6
Ecological consulting firms in Gent	4
Ecological consulting firms in Antwerpen	4
Ecological consulting firms in Bruxelles	4
Ecological consulting firms in Antwerp	3
Ecological consulting firms in Roeselare	3

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 “ecological consulting firms”, with match quality audited by blind human judging, and headquartered in Belgium.
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; 2 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 ecological consulting firms are there based in Belgium?

There are 120 ecological consulting firms headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Trevi NV, headquartered in Grobbendonk, tops this list with the largest team on record.

Which city has the most ecological consulting firms?

Brussels leads with 8 headquartered companies, followed by Liege (6) and Gent (4).

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 460 verified decision-maker contacts tracked across these 120 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 120 ecological consulting firms based in Belgium. Start with a free account, no credit card.

Get the full list

Related lists

Ecological consulting firms by geography

Browse the directory

Browse: Companies home · All Belgium lists · All Ecological 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.