Company lists · Data refreshed August 2026

Top 25 Clean energy consultancy companies based in Belgium

Name: Clean energy consultancy companies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 405 companies tracked

RevenueBase identified 405 clean energy consultancy companies headquartered in Belgium as of August 2026 and tracks 9,331 professional contacts across them, including 1,265 with verified work emails and 263 with mobile numbers. Brussels is the largest hub.

This list covers clean energy consultancy 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 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

405Companies

9,331Contacts tracked

1,265Verified emails

263Mobile numbers

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The 25 largest clean energy consultancy companies based in Belgium

Ranked by team size

Top 25 of 405 clean energy consultancy companies 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 clean energy consultancy 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	Partial evidence	Brussels, Belgium	51-200	127 contacts →
	Partial 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
2	Enersol	Indirect evidence	Battice, Belgium	51-200	101 contacts →
	Indirect evidence “Depuis 2005, notre objectif est d’accompagner nos clients dans la transition énergétique de leurs bâtiments privés ou professionnels.” Source: RevenueBase Database · checked Aug 31, 2026
3	E&c Consultants	Strong evidence	Kortrijk, Belgium	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 Aug 31, 2026
4	Ecorus	Partial evidence	Hasselt, Belgium	51-200	93 contacts →
	Partial evidence “Ecorus turns large-scale energy projects into predictable energy assets.” Source: RevenueBase Database · checked Aug 31, 2026
5	Methis Consulting	Indirect evidence	Antwerpen, Belgium	51-200	75 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Aug 31, 2026
6	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
7	VVA Group	Indirect evidence	Brussels, Belgium	51-200	64 contacts →
	Indirect evidence “Valdani Vicari & Associati (VVA), established in 1992, is a consulting company based in Milan with a team of professionals including economists, sociologists, political…” Source: RevenueBase Database · checked Aug 31, 2026
8	Energyking	Partial evidence	Belgium	51-200	53 contacts →
	Partial evidence “EnergyKing werd in 2013 opgericht door twee ingenieurs: Lucas & Wiet.” Source: RevenueBase Database · checked Aug 31, 2026
9	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
10	MR Solar	Partial evidence	Destelbergen, Belgium	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 Aug 31, 2026
11	Baastel	Indirect evidence	Bruxelles, Belgium	11-50	50 contacts →
	Indirect 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
12	Linea Trovata Group	Partial evidence	Ardooie, Belgium	51-200	48 contacts →
	Partial evidence “Duurzaam naar de laagste energiekost.” Source: RevenueBase Database · checked Aug 31, 2026
13	Insaver	Indirect evidence	Belgium	51-200	44 contacts →
	Indirect evidence “At Insaver, we guide you every step of the way toward a low-carbon future.” Source: RevenueBase Database · checked Aug 31, 2026
14	E-Cube Strategy Consultants	Partial evidence	Brussels Brussels, Belgium	11-50	43 contacts →
	Partial 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	Consultes	Partial evidence	Antwerp, Belgium	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 Aug 31, 2026
16	Bureau D'études A Concept	Indirect evidence	Liege, Belgium	11-50	34 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 Aug 31, 2026
17	Enerdeal By EDP	Partial evidence	Zaventem, Belgium	11-50	32 contacts →
	Partial 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 Aug 31, 2026
18	Coretec Energy	Indirect evidence	Angleur, Belgium	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 Aug 31, 2026
19	Delpower	Partial evidence	Belgium	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 Aug 31, 2026
20	Ecopuur	Indirect evidence	Drongen, Belgium	11-50	23 contacts →
	Indirect evidence “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Source: RevenueBase Database · checked Aug 31, 2026
21	Helexia Belgium	Partial evidence	Antwerpen, Belgium	201-500	23 contacts →
	Partial evidence “Helexia is your all-in-one partner for accelerating your energy transition.” Source: RevenueBase Database · checked Aug 31, 2026
22	ENSYS	Partial evidence	Kapellen, Belgium	11-50	22 contacts →
	Partial evidence “As specialists in the field of renewable energy and energy efficiency, we offer unique proposals to both individuals and businesses.” Source: RevenueBase Database · checked Aug 31, 2026
23	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
24	Cenergie	Partial evidence	Antwerpen, Belgium	11-50	20 contacts →
	Partial evidence “CENERGIE delivers consulting, design, engineering and project management services for energy-efficient and sustainable buildings during their entire lifecycle.” Source: RevenueBase Database · checked Aug 31, 2026
25	ODOT	Strong evidence	Schoten, Belgium	11-50	20 contacts →
	Strong evidence “Odot optimises energy management for businesses and specialises in Energy Contract Management, consumption monitoring and customised consultancy services.” 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: clean energy consultancy 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 clean energy consultancy companies.
Partial evidence: Its own public description names part of clean energy consultancy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy consultancy 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 405 clean energy consultancy companies based in Belgium

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Clean energy consultancy companies based in Belgium at a glance

As of Aug 31, 2026

13.6%Verified-email coverage

2.8%Mobile-number coverage

23.0Average contacts per company

1-10Median size (employees)

9.6%Largest-city concentration · Brussels

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

269

11-50

100

51-200

201-500

501-1,000

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 clean energy consultancy 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 “clean energy consultancy 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 clean energy consultancy 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 clean energy consultancy 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, 1,265 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.

Clean energy consultancy companies by metro

Clean energy consultancy companies 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 clean energy consultancy 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 clean energy consultancy companies are there based in Belgium?

RevenueBase identified 405 clean energy consultancy companies 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?

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

Which city has the most clean energy consultancy companies?

Brussels leads with 39 headquartered companies, followed by Bruxelles (10) and Liege (9).

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 1,265 verified decision-maker contacts tracked across these 405 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.

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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.