Company lists · Data refreshed September 2026

Top 25 Climate change consulting companies based in Belgium

Name: Climate change consulting companies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 168 companies tracked

RevenueBase identified 168 climate change consulting companies headquartered in Belgium as of September 2026 and tracks 7,041 professional contacts across them, including 540 with verified work emails. Brussels is the largest hub.

This list covers climate change consulting companies 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 September 19, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

168Companies

7,041Contacts tracked

540Verified emails

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The 25 largest climate change consulting companies based in Belgium

Ranked by team size

Top 25 of 168 climate change consulting companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to climate change consulting companies: 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	AESA	Indirect evidence	Brussels, BelgiumHQ checked Sep 19, 2026	51-200	128 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 Sep 19, 2026
2	Hinicio	Partial evidence	Brussels, BelgiumHQ checked Sep 19, 2026	51-200	76 contacts →
	Partial evidence “Founded in 2006, HINICIO is a strategic consulting firm specialized in the decarbonization challenges of hard-to-abate sectors, with more than 20 years of experience in hydrogen…” Source: RevenueBase Database · checked Sep 19, 2026
3	Deplasse	Indirect evidence	Watermael-boitsfort, BelgiumHQ checked Sep 19, 2026	51-200	74 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 Sep 19, 2026
4	Climact	Strong evidence	Brussels, BelgiumHQ checked Sep 19, 2026	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 Sep 19, 2026
5	BOPRO	Indirect evidence	Ghent, BelgiumHQ checked Sep 19, 2026	51-200	63 contacts →
	Indirect evidence “In forty years Bopro has emerged into a solid, renowned company specialised in Sustainable Real Estate Development, Project Management and Consultancy services in Europe.” Source: RevenueBase Database · checked Sep 19, 2026
6	Broptimize Energy	Indirect evidence	Remicourt, BelgiumHQ checked Sep 19, 2026	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 Sep 19, 2026
7	Consultes	Indirect evidence	Zwevegem, BelgiumHQ checked Sep 19, 2026	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 Sep 19, 2026
8	RDC Environment	Indirect evidence	Brussels, BelgiumHQ checked Sep 19, 2026	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 Sep 19, 2026
9	Bellona Europa	Partial evidence	Brussels, BelgiumHQ checked Sep 19, 2026	11-50	29 contacts →
	Partial evidence “Bellona Europa is an independent, non-profit organisation that meets environmental and climate challenges head on.” Source: RevenueBase Database · checked Sep 19, 2026
10	DR EA M	Indirect evidence	Pont-à-celles, BelgiumHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “DR(EA)²M est un bureau d’études spécialisé dans les matières du développement territorial, de l’aménagement urbain et paysager, de l’environnement, de l’architecture et de…” Source: RevenueBase Database · checked Sep 19, 2026
11	Co2logic, A South Pole Company	Partial evidence	Brussels, BelgiumHQ checked Sep 19, 2026	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 Sep 19, 2026
12	D-Carbonize	Partial evidence	Brussels, BelgiumHQ checked Sep 19, 2026	11-50	23 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 Sep 19, 2026
13	Klimaatcontact VZW	Indirect evidence	Overal In Vlaanderen En Brussel!, BelgiumHQ checked Sep 19, 2026	1-10	22 contacts →
	Indirect evidence “KlimaatContact maakt van klimaatvriendelijke keuzes het nieuwe normaal.” Source: RevenueBase Database · checked Sep 19, 2026
14	SLO	Indirect evidence	Brussels, BelgiumHQ checked Sep 19, 2026	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 Sep 19, 2026
15	Axilium Group	Indirect evidence	Schilde, BelgiumHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Axilium is een technisch studiebureau dat waarde hecht aan innovatie, duurzaamheid en kwaliteit.” Source: RevenueBase Database · checked Sep 19, 2026
16	BLEEN	Indirect evidence	Brussels, BelgiumHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “World's gone nuts.” Source: RevenueBase Database · checked Sep 19, 2026
17	Matriciel	Indirect evidence	Louvain-la-neuve, BelgiumHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “L'activité de la société MATRIciel vise une MEILLEURE PERFORMANCE ENERGETIQUE ET ENVIRONNEMENTALE DES BATIMENTS dans le cadre du développement durable par une participation active…” Source: RevenueBase Database · checked Sep 19, 2026
18	Esglogic	Strong evidence	Ixelles, BelgiumHQ checked Sep 19, 2026	11-50	14 contacts →
	Strong evidence “ESGlogic is a European ESG consulting firm, based in Belgium supporting companies across sectors in sustainability, climate and regulatory transformation.” Source: RevenueBase Database · checked Sep 19, 2026
19	Advista	Indirect evidence	Louvain-la-neuve, BelgiumHQ checked Sep 19, 2026	1-10	13 contacts →
	Indirect evidence “ADVISTA est un bureau d’études et de conseils en environnement et développement durable.” Source: RevenueBase Database · checked Sep 19, 2026
20	Exergie Part Of UEG	Indirect evidence	Beringen, BelgiumHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “Wij bij Exergie, willen de wereld verduurzamen.” Source: RevenueBase Database · checked Sep 19, 2026
21	Mantis Consulting	Partial evidence	Gent, BelgiumHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “Mantis Consulting is a Belgian based B2B consultancy firm for energy and sustainability.” Source: RevenueBase Database · checked Sep 19, 2026
22	Gevelinzicht Ingenieur-Architecten	Indirect evidence	Antwerp, BelgiumHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Gevelinzicht is een gespecialiseerd studiebureau met ervaring en expertise op vlak van technisch gevelontwerp, bouwfysica, duurzaam bouwen en energieprestaties van gebouwen.” Source: RevenueBase Database · checked Sep 19, 2026
23	Drees & Sommer Belgium	Indirect evidence	Brussels, BelgiumHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “From the first idea to delivery and operation, we guide projects with a holistic approach that combines strategic advice and practical implementation.” Source: RevenueBase Database · checked Sep 19, 2026
24	Adviesbureau Decock	Indirect evidence	Langemark, BelgiumHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Adviesbureau Decock begeleidt bedrijven en particulieren die ondersteuning nodig hebben in alles wat met milieu en omgeving te maken heeft.” Source: RevenueBase Database · checked Sep 19, 2026
25	21solutions	Partial evidence	Brussels, BelgiumHQ checked Sep 19, 2026	1-10	10 contacts →
	Partial evidence “21 Solutions is a consulting firm active in Belgium, France, and internationally.” Source: RevenueBase Database · checked Sep 19, 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 companies. 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 companies.
Partial evidence: Its own public description names part of climate change consulting companies, 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 companies. 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 168 climate change consulting companies based in Belgium

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Climate change consulting companies based in Belgium at a glance

As of Sep 19, 2026

7.7%Verified-email coverage

41.9Average contacts per company

1-10Median size (employees)

18.5%Largest-city concentration · Brussels

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

119

11-50

51-200

5,001-10,000

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 168 companies.

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 companies, 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 companies”. 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 companies), 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 companies, 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, 540 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 September 19, 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 companies by metro

Climate change consulting companies in Brussels31

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 companies, 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 companies are there based in Belgium?

RevenueBase identified 168 climate change consulting companies headquartered in Belgium as of September 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?

AESA, headquartered in Brussels, tops this list with the largest team on record.

Which city has the most climate change consulting companies?

Brussels leads with 31 headquartered companies, followed by Antwerp (6) and Liege (6).

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 540 verified decision-maker contacts tracked across these 168 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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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.