Company lists · Data refreshed September 2026

Top 25 Energy and sustainability consultants based in Belgium

Name: Energy and sustainability consultants based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 447 companies tracked

RevenueBase identified 447 energy and sustainability consultants headquartered in Belgium as of September 2026 and tracks 9,452 professional contacts across them, including 1,409 with verified work emails. Brussels is the largest hub.

This list covers energy and sustainability consultants 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 21, 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 21, 2026 86% judged on-target in blind review

447Companies

9,452Contacts tracked

1,409Verified emails

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The 25 largest energy and sustainability consultants based in Belgium

Ranked by team size

Top 25 of 447 energy and sustainability consultants based in Belgium, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy and sustainability consultants: 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	INDEA	Partial evidence	Aalst, BelgiumHQ checked Sep 21, 2026	n/a	115 contacts →
	Partial evidence “Wij helpen industriële bedrijven hun energiekosten te verminderen.” Source: RevenueBase Database · checked Sep 21, 2026
2	E&c Consultants	Strong evidence	Kortrijk, BelgiumHQ checked Sep 21, 2026	51-200	100 contacts →
	Strong evidence “E&C is an energy consultancy with an international team of energy experts that offer a unique blend of global capabilities and local expertise.” Source: RevenueBase Database · checked Sep 21, 2026
3	Hinicio	Indirect evidence	Brussels, BelgiumHQ checked Sep 21, 2026	51-200	76 contacts →
	Indirect 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 21, 2026
4	Deplasse	Indirect evidence	Watermael-boitsfort, BelgiumHQ checked Sep 21, 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 21, 2026
5	Climact	Indirect evidence	Brussels, BelgiumHQ checked Sep 21, 2026	11-50	64 contacts →
	Indirect 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 21, 2026
6	BOPRO	Partial evidence	Ghent, BelgiumHQ checked Sep 21, 2026	51-200	63 contacts →
	Partial 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 21, 2026
7	Luminus Solutions	Partial evidence	Bruxelles, BelgiumHQ checked Sep 21, 2026	11-50	61 contacts →
	Partial evidence “Together, let’s take on the energy transition challenge!” Source: RevenueBase Database · checked Sep 21, 2026
8	CES Group	Partial evidence	Asse, BelgiumHQ checked Sep 21, 2026	51-200	56 contacts →
	Partial evidence “CES provides a consulting service in the areas of energy, technical installations and processing.” Source: RevenueBase Database · checked Sep 21, 2026
9	Comfort Energy Group	Partial evidence	Hasselt, BelgiumHQ checked Sep 21, 2026	201-500	54 contacts →
	Partial evidence “Through new insights, innovation, and well-reasoned initiatives, we strive to use the available energy resources in a responsible way and to offer sustainable added value for a…” Source: RevenueBase Database · checked Sep 21, 2026
10	Energyking	Partial evidence	Herent, BelgiumHQ checked Sep 21, 2026	51-200	53 contacts →
	Partial evidence “EnergyKing werd in 2013 opgericht door twee ingenieurs: Lucas & Wiet.” Source: RevenueBase Database · checked Sep 21, 2026
11	Broptimize Energy	Indirect evidence	Remicourt, BelgiumHQ checked Sep 21, 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 21, 2026
12	MR Solar	Partial evidence	Zwevegem, BelgiumHQ checked Sep 21, 2026	51-200	51 contacts →
	Partial evidence “Efficiency Thanks to our advice focused on a sustainable ecosystem, we offer our customers a tailor-made energy solution, resulting in optimal efficiency in both the near and…” Source: RevenueBase Database · checked Sep 21, 2026
13	ICEDD	Partial evidence	Namur, BelgiumHQ checked Sep 21, 2026	11-50	49 contacts →
	Partial evidence “Our background The Institut de Conseil et d'Etudes en Développement Durable (Institute for Consultancy and Studies in Sustainable Development) was founded in 1961 as a non-profit…” Source: RevenueBase Database · checked Sep 21, 2026
14	A2m Architecture	Indirect evidence	Brussels, BelgiumHQ checked Sep 21, 2026	51-200	48 contacts →
	Indirect evidence “A2M is an international practice driven by an ardent belief in the possibilities of modern architecture and a keen curiosity about building physics, our interdisciplinary team…” Source: RevenueBase Database · checked Sep 21, 2026
15	Linea Trovata Group	Indirect evidence	Lokeren, BelgiumHQ checked Sep 21, 2026	51-200	48 contacts →
	Indirect evidence “Zonnepanelen, batterijen, laadinfrastructuur slimme sturingen en warmte- en koeloplossingen?” Source: RevenueBase Database · checked Sep 21, 2026
16	Insaver	Indirect evidence	Houthalen, BelgiumHQ checked Sep 21, 2026	51-200	45 contacts →
	Indirect evidence “At Insaver, we guide you every step of the way toward a low-carbon future.” Source: RevenueBase Database · checked Sep 21, 2026
17	Bureau D'études A Concept	Indirect evidence	Liège, BelgiumHQ checked Sep 21, 2026	11-50	38 contacts →
	Indirect evidence “A+ Concept est un bureau d'études composé d'experts énergétiques et ingénieurs spécialisés dans les techniques du bâtiment.” Source: RevenueBase Database · checked Sep 21, 2026
18	Earth Belgium	Indirect evidence	Harelbeke, BelgiumHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence “Earth is a Flemish company specialized in engineering and installing sustainable solar panels, home batteries, electric charging stations and LED's.” Source: RevenueBase Database · checked Sep 21, 2026
19	MK Engineering	Partial evidence	Bruxelles, BelgiumHQ checked Sep 21, 2026	11-50	35 contacts →
	Partial evidence “Bureau d'Etudes en Design Energétique du Bâtiment, MK Engineering s'est forgé une solide expérience en conception très basse énergie avec ses services de Conseil aux Architecte et…” Source: RevenueBase Database · checked Sep 21, 2026
20	Consultes	Partial evidence	Zwevegem, BelgiumHQ checked Sep 21, 2026	11-50	34 contacts →
	Partial evidence “Consultes is een allround partner voor bedrijven op vlak van milieu, preventie, energie en duurzaamheid.” Source: RevenueBase Database · checked Sep 21, 2026
21	Enerdeal By EDP	Strong evidence	Zaventem, BelgiumHQ checked Sep 21, 2026	11-50	33 contacts →
	Strong evidence “Enerdeal by EDP supports industrial and public players in their energy transition, turning solar energy into a strategic lever for performance, sustainability and independence.” Source: RevenueBase Database · checked Sep 21, 2026
22	RDC Environment	Indirect evidence	Brussels, BelgiumHQ checked Sep 21, 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 21, 2026
23	DR EA M	Indirect evidence	Pont-à-celles, BelgiumHQ checked Sep 21, 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 21, 2026
24	Coretec Energy	Indirect evidence	Angleur, BelgiumHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “ACTIVITÉS ET PRODUITS CORETEC, votre partenaire vers une gestion durable et performante de votre énergie, a comme principal objectif de réduire la facture énergétique et donc…” Source: RevenueBase Database · checked Sep 21, 2026
25	Delpower	Partial evidence	Thimister-clermont, BelgiumHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “DELPOWER is an energy efficiency engineering company dedicated to optimising energy costs for tertiary and industrial customers.” Source: RevenueBase Database · checked Sep 21, 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: energy and sustainability consultants. 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 energy and sustainability consultants.
Partial evidence: Its own public description names part of energy and sustainability consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy and sustainability consultants. 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 447 energy and sustainability consultants based in Belgium

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Energy and sustainability consultants based in Belgium at a glance

As of Sep 21, 2026

14.9%Verified-email coverage

21.1Average contacts per company

1-10Median size (employees)

6.3%Largest-city concentration · Brussels

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

313

11-50

100

51-200

201-500

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 447 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 energy and sustainability consultants, 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 “energy and sustainability consultants”. 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 energy and sustainability consultants), 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 energy and sustainability consultants, 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, 1,409 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 21, 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.

Energy and sustainability consultants by metro

Energy and sustainability consultants in Brussels28

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 energy and sustainability consultants, 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 energy and sustainability consultants are there based in Belgium?

RevenueBase identified 447 energy and sustainability consultants 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?

INDEA, headquartered in Aalst, tops this list with the largest team on record.

Which city has the most energy and sustainability consultants?

Brussels leads with 28 headquartered companies, followed by Bruxelles (13) and Antwerpen (12).

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 1,409 verified decision-maker contacts tracked across these 447 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 21, 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.