Company lists · Data refreshed 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 Data refreshed Aug 31, 2026 202 companies tracked

RevenueBase identified 202 climate change consulting firms headquartered in Belgium as of August 2026 and 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 31, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

202Companies

9,312Contacts tracked

1,925Verified emails

838Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

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 refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to climate change consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Environmental Defense Fund	Partial evidence	Belgium	1,001-5,000	1,344 contacts →
	Partial evidence “We are Environmental Defense Fund, a leading environmental nonprofit focused on stabilizing the climate while helping build strong and healthy communities.” Source: RevenueBase Database · checked Aug 31, 2026
2	Antea Group Belgium	Partial evidence	Namur, Belgium	201-500	220 contacts →
	Partial evidence “Antea Group is an international consulting and engineering firm, specializing in full-service solutions in the fields of environment, infrastructure, public space, and water.” Source: RevenueBase Database · checked Aug 31, 2026
3	IQO	Indirect evidence	Bruxelles, Belgium	51-200	156 contacts →
	Indirect evidence “In a world that’s constantly being reinvented, where only companies that choose to operate FOR GOOD will succeed in building resilient growth models, where business models combine…” Source: RevenueBase Database · checked Aug 31, 2026
4	AESA	Indirect evidence	Brussels, Belgium	51-200	127 contacts →
	Indirect evidence “AESA is a leading European management consultancy, providing technical assistance and project management services in Low and Middle income countries as well as in Transition…” Source: RevenueBase Database · checked Aug 31, 2026
5	Fipra Public Affairs	Indirect evidence	Brussels, Belgium	51-200	105 contacts →
	Indirect evidence “We’re a team of solution finders, consensus builders, policy wonks, political navigators, debate shapers and policy movers.” Source: RevenueBase Database · checked Aug 31, 2026
6	ENCON	Indirect evidence	Bilzen, Belgium	51-200	104 contacts →
	Indirect evidence “Encon supports businesses as an independent agency with creative and innovative solutions in their transition to become more sustainable.” Source: RevenueBase Database · checked Aug 31, 2026
7	Tauw Belgium	Indirect evidence	Leuven Wijgmaal, Belgium	51-200	80 contacts →
	Indirect evidence “We shape a vital living environment.” Source: RevenueBase Database · checked Aug 31, 2026
8	Deplasse	Indirect evidence	Watermael-Boitsfort, Belgium	51-200	68 contacts →
	Indirect evidence “Deplasse est un bureau d’études et de conseils qui offre une vision globale et transversale sur la transition énergétique incluant expertise technique, approche patrimoniale et…” Source: RevenueBase Database · checked Aug 31, 2026
9	Climact	Strong evidence	Belgium	11-50	64 contacts →
	Strong evidence “CLIMACT empowers organizations, cities and public authorities to understand climate change and to achieve a zero-carbon sustainable society by 2050.” Source: RevenueBase Database · checked Aug 31, 2026
10	Broptimize Energy	Indirect evidence	Remicourt, Belgium	51-200	51 contacts →
	Indirect evidence “Fondée en 2016 par deux frères, Sébastien et Michael Menu et issue de l'Université de Liège, Broptimize est aujourd'hui la référence en matière d'accompagnement dans la transition…” Source: RevenueBase Database · checked Aug 31, 2026
11	Nexio Projects	Indirect evidence	Zaventem, Belgium	11-50	50 contacts →
	Indirect evidence “Nexio Projects is an international consultancy firm, helping organisations reach their sustainability ambitions.” Source: RevenueBase Database · checked Aug 31, 2026
12	Baastel	Partial evidence	Bruxelles, Belgium	11-50	50 contacts →
	Partial evidence “Established in 1989, Baastel is a global consulting firm specializing in sustainable development, with offices in Gatineau (Canada), Brussels (Belgium) and Paris (France).” Source: RevenueBase Database · checked Aug 31, 2026
13	Clerens	Indirect evidence	Brussels, Belgium	11-50	45 contacts →
	Indirect evidence “CLERENS is a leading public affairs and communications consultancy based in Brussels.” Source: RevenueBase Database · checked Aug 31, 2026
14	E-Cube Strategy Consultants	Strong evidence	Brussels Brussels, Belgium	11-50	43 contacts →
	Strong evidence “E-CUBE, the strategy consulting firm dedicated to energy, transport and climate stakes We combine innovative strategic thinking with deep industry expertise to deliver outstanding…” Source: RevenueBase Database · checked Aug 31, 2026
15	Trente Sept Cinq 37.5	Indirect evidence	Belgium	11-50	41 contacts →
	Indirect evidence “37.5 est née d’une idée simple : le succès ne vaut que s’il est partagé par tous et s’il s’inscrit dans la durée.” Source: RevenueBase Database · checked Aug 31, 2026
16	Sher Ingénieurs-Conseils	Indirect evidence	Vedrin, Belgium	11-50	38 contacts →
	Indirect evidence “SHER Ingénieurs-Conseils, a Belgian engineering consultancy office and member of the Artelia Group, provides its services worldwide for projects related to water, human and animal…” Source: RevenueBase Database · checked Aug 31, 2026
17	Consultes	Indirect evidence	Antwerp, Belgium	11-50	34 contacts →
	Indirect evidence “Consultes is een allround partner voor bedrijven op vlak van milieu, preventie, energie en duurzaamheid.” Source: RevenueBase Database · checked Aug 31, 2026
18	RDC Environment	Indirect evidence	Bruxelles, Belgium	11-50	31 contacts →
	Indirect evidence “Our mission is to support decision-making towards a sustainable world." – Bernard De Caevel, Founder of RDC Environment For more than 30 years, RDC Environment has been helping…” Source: RevenueBase Database · checked Aug 31, 2026
19	Co2logic, A South Pole Company	Partial evidence	Belgium	11-50	24 contacts →
	Partial evidence “CO2logic joined the South Pole Group in 2021, forming the world’s largest climate solutions provider and carbon project developer.” Source: RevenueBase Database · checked Aug 31, 2026
20	Sustenuto	Partial evidence	Belgium	11-50	24 contacts →
	Partial evidence “Sustenuto is a strategic consulting firm that helps organisations make a difference in society by integrating sustainability at the core of their business.” Source: RevenueBase Database · checked Aug 31, 2026
21	Raco By Studibo	Indirect evidence	Heusden-Zolder, Belgium	11-50	21 contacts →
	Indirect evidence “Bij Raco by Studibo ondersteunen we bouwprojecten met studies van technische installaties, advies en projectbegeleiding.” Source: RevenueBase Database · checked Aug 31, 2026
22	D-Carbonize	Partial evidence	Brussels, Belgium	11-50	20 contacts →
	Partial evidence “Driven by the urgency of climate action, D-Carbonize helps industrial companies turn decarbonization into a lever for performance.” Source: RevenueBase Database · checked Aug 31, 2026
23	SLO	Indirect evidence	Brussels, Belgium	11-50	20 contacts →
	Indirect evidence “In a time of ecological challenges and economic uncertainty, businesses play a pivotal role in keeping society stable.” Source: RevenueBase Database · checked Aug 31, 2026
24	Axilium Group	Indirect evidence	Schilde, Belgium	11-50	18 contacts →
	Indirect evidence “Axilium is een technisch studiebureau dat waarde hecht aan innovatie, duurzaamheid en kwaliteit.” Source: RevenueBase Database · checked Aug 31, 2026
25	BLEEN	Indirect evidence	Brussels, Belgium	11-50	18 contacts →
	Indirect evidence “World's gone nuts.” Source: RevenueBase Database · checked Aug 31, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: climate change consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names climate change consulting firms.
Partial evidence: Its own public description names part of climate change consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate change consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 202 climate change consulting firms based in Belgium

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,925 reachable decision-makers.

Free signup · no credit card

View the full list →

Climate change consulting firms based in Belgium at a glance

As of Aug 31, 2026

20.7%Verified-email coverage

9.0%Mobile-number coverage

46.1Average contacts per company

1-10Median size (employees)

19.3%Largest-city concentration · Brussels

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

135

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among climate change consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Belgium whose own description of what they do matches “climate change consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names climate change consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among climate change consulting firms, and records with no verified work email. Companies headquartered outside Belgium are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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: Every listed company carries at least one verified work email, 1,925 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on August 31, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Climate change consulting firms by metro

Climate change consulting firms in Brussels39

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names climate change consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many climate change consulting firms are there based in Belgium?

RevenueBase identified 202 climate change consulting firms headquartered in Belgium as of August 2026, matched on each company's own description of what it does rather than its industry code.

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 refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 2026.

Ready to reach these companies? Verified emails and direct dials for all 202 climate change consulting firms based in Belgium. Start with a free account, no credit card.

Download this list →

Related lists

Climate change consulting firms by geography

Browse the directory

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.