Company lists · Data verified August 2026

Top 25 Esg consulting firms based in Belgium

Name: Esg 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 172 companies tracked

There are 172 esg consulting firms headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 1,985 professional contacts across them, including 912 with verified work emails and 77 with mobile numbers. Brussels is the largest hub.

This list covers esg 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.

172Companies

1,985Contacts tracked

912Verified emails

77Mobile numbers

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The 25 largest esg consulting firms based in Belgium

Ranked by team size

Top 25 of 172 esg 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	Position Green	n/a	201-500	323	160
2	Baker Tilly Belgium	Mechelen	201-500	219	144
3	IQO	Bruxelles	51-200	156	104
4	ENCON	Bilzen	51-200	104	52
5	VVA Group	Brussels	51-200	64	16
6	Climact	n/a	11-50	64	7
7	Nexio Projects	Zaventem	11-50	50	40
8	Baastel	Bruxelles	11-50	50	28
9	Trente Sept Cinq 37.5	n/a	11-50	41	27
10	Consultes	Antwerp	11-50	34	29
11	Fullmark	Nivelles	11-50	34	7
12	RDC Environment	Bruxelles	11-50	31	24
13	Sustenuto	n/a	11-50	24	14
14	Circle Strategy	Brussels	51-200	23	17
15	Research And Solutions	Strombeek-Bever	11-50	21	1
16	SLO	Brussels	11-50	20	14
17	Matriciel	Louvain-La-Neuve	11-50	15	10
18	The Ecological Entrepreneur	n/a	11-50	15	1
19	Impact Valley	Ixelles Brussels	11-50	14	12
20	Esglogic	Ixelles Brussels	11-50	14	11
21	Miles Legal	Brussels	1-10	14	11
22	Exergie Part Of UEG	Lovenjoel	11-50	14	7
23	Wave Group	n/a	11-50	13	7
24	AG Environnement	n/a	11-50	13	5
25	Mantis Consulting	Gent	1-10	12	9

Showing 25 of 172 esg consulting firms based in Belgium

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Esg consulting firms based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 34 HQs

77Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

127

11-50

51-200

201-500

Esg consulting firms by metro

Metro	Companies
Esg consulting firms in Brussels	34
Esg consulting firms in Antwerp	9
Esg consulting firms in Liege	7
Esg consulting firms in Bruxelles	7
Esg consulting firms in Leuven	5
Esg consulting firms in Gent	4
Esg consulting firms in Antwerpen	4

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 “esg 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; 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 esg consulting firms are there based in Belgium?

There are 172 esg consulting firms headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Position Green, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most esg consulting firms?

Brussels leads with 34 headquartered companies, followed by Antwerp (9) and Liege (7).

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 912 verified decision-maker contacts tracked across these 172 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.