Company lists · Data verified August 2026

Top 25 Climate change consulting firms based in Belgium

Name: Climate change 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 202 companies tracked

There are 202 climate change consulting firms headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 9,312 professional contacts across them, including 1,925 with verified work emails and 838 with mobile numbers. Brussels is the largest hub.

This list covers climate change 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.

202Companies

9,312Contacts tracked

1,925Verified emails

838Mobile numbers

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The 25 largest climate change consulting firms based in Belgium

Ranked by team size

Top 25 of 202 climate change 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	Environmental Defense Fund	n/a	1,001-5,000	1,344	863
2	Antea Group Belgium	Namur	201-500	220	145
3	IQO	Bruxelles	51-200	156	104
4	AESA	Brussels	51-200	127	11
5	Fipra Public Affairs	Brussels	51-200	105	63
6	ENCON	Bilzen	51-200	104	52
7	Tauw Belgium	Leuven Wijgmaal	51-200	80	50
8	Deplasse	Watermael-Boitsfort	51-200	68	44
9	Climact	n/a	11-50	64	7
10	Broptimize Energy	Remicourt	51-200	51	35
11	Nexio Projects	Zaventem	11-50	50	40
12	Baastel	Bruxelles	11-50	50	28
13	Clerens	Brussels	11-50	45	26
14	E-Cube Strategy Consultants	Brussels Brussels	11-50	43	23
15	Trente Sept Cinq 37.5	n/a	11-50	41	27
16	Sher Ingénieurs-Conseils	Vedrin	11-50	38	14
17	Consultes	Antwerp	11-50	34	29
18	RDC Environment	Bruxelles	11-50	31	24
19	Co2logic, A South Pole Company	n/a	11-50	24	15
20	Sustenuto	n/a	11-50	24	14
21	Raco By Studibo	Heusden-Zolder	11-50	21	17
22	D-Carbonize	Brussels	11-50	20	18
23	SLO	Brussels	11-50	20	14
24	Axilium Group	Schilde	11-50	18	13
25	BLEEN	Brussels	11-50	18	7

Showing 25 of 202 climate change consulting firms based in Belgium

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Climate change consulting firms based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 39 HQs

838Contacts with mobile numbers

13Emails re-verified in last 30 days

Companies by employee count

1-10

135

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Climate change consulting firms by metro

Metro	Companies
Climate change consulting firms in Brussels	39
Climate change consulting firms in Antwerp	9
Climate change consulting firms in Bruxelles	8
Climate change consulting firms in Liege	7
Climate change consulting firms in Gent	6
Climate change consulting firms in Leuven	4
Climate change consulting firms in Antwerpen	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 “climate change 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; 13 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 climate change consulting firms are there based in Belgium?

There are 202 climate change consulting firms headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Environmental Defense Fund, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most climate change consulting firms?

Brussels leads with 39 headquartered companies, followed by Antwerp (9) and Bruxelles (8).

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 1,925 verified decision-maker contacts tracked across these 202 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.