Company lists · Data refreshed October 2026

Top 25 Energy efficiency engineering firms based in Belgium

Name: Energy efficiency engineering firms based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 298 companies tracked

RevenueBase identified 298 company matches for energy efficiency engineering firms associated with Belgium as of October 2026 and tracks 13,839 professional contacts across them, including 2,700 with verified work emails. Brussels is the largest hub.

This list covers company matches for energy efficiency engineering firms associated with Belgium, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

298Companies

13,839Contacts tracked

2,700Verified emails

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The 25 largest energy efficiency engineering firms based in Belgium

Ranked by team size

Top 25 of 298 company matches for energy efficiency engineering firms based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Equans Belux	Exact match	Brussels, BelgiumHQ recorded Oct 12, 2026	5,001-10,000	5,347 contacts →
	Exact match “What if you could use your talent to contribute to the great challenges of tomorrow?” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	INDEA	Exact match	Aalst, BelgiumHQ recorded Oct 12, 2026	n/a	118 contacts →
	Exact match “Wij helpen industriële bedrijven hun energiekosten te verminderen.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	ingenium.be	Exact match	Brugge, BelgiumHQ recorded Oct 12, 2026	51-200	107 contacts →
	Exact match “Ingenium is shaping a sustainable future.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Reno Energy	Exact match	Liège (angleur), BelgiumHQ recorded Oct 12, 2026	51-200	103 contacts →
	Exact match “Reno Energy est une entreprise spécialisée dans le secteur de la rénovation énergétique mais aussi dans la nouvelle construction.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Bureau D Etudes Lemaire	Exact match	Grâce-hollogne, BelgiumHQ recorded Oct 12, 2026	51-200	75 contacts →
	Exact match “Le bureau d’études Lemaire a été fondé par Frédéric Lemaire, ingénieur civil en construction.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	DD Engineering	Exact match	Ghent, BelgiumHQ recorded Oct 12, 2026	51-200	72 contacts →
	Exact match “Bij DDE engineeren we de fabrieken van morgen.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Deplasse	Exact match	Watermael-boitsfort, BelgiumHQ recorded Oct 12, 2026	51-200	63 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Luminus Solutions	Exact match	Brussels, BelgiumHQ recorded Oct 12, 2026	11-50	58 contacts →
	Exact match “Together, let’s take on the energy transition challenge!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	CES Group	Exact match	Asse, BelgiumHQ recorded Oct 12, 2026	51-200	58 contacts →
	Exact match “CES provides a consulting service in the areas of energy, technical installations and processing.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	MR Solar	Exact match	Zwevegem, BelgiumHQ recorded Oct 12, 2026	51-200	44 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	The Energy Circle	Exact match	Hasselt, BelgiumHQ recorded Oct 12, 2026	201-500	44 contacts →
	Exact match “Van onderhoud & monitoring, elektrische installaties & groene stroom, tot waterbeheer & HVAC-systemen: The Energy Circle heeft alle expertise in huis om grote gebouwen en…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Broptimize Energy	Exact match	Remicourt, BelgiumHQ recorded Oct 12, 2026	51-200	41 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	DSG	Exact match	Aartselaar, BelgiumHQ recorded Oct 12, 2026	51-200	39 contacts →
	Exact match “WHEN POWER BECOMES SMART Whether we’re working on guarantee, realisation or optimisation projects, our experts create the best solution for you, from design to realisation.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	MK Engineering	Exact match	Brussels, BelgiumHQ recorded Oct 12, 2026	11-50	39 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Bureau D'études A Concept	Exact match	Liège, BelgiumHQ recorded Oct 12, 2026	11-50	37 contacts →
	Exact match “A+ Concept est un bureau d'études composé d'experts énergétiques et ingénieurs spécialisés dans les techniques du bâtiment.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	E&c Consultants	Exact match	Kortrijk, BelgiumHQ recorded Oct 12, 2026	51-200	37 contacts →
	Exact match “E&C is an energy consultancy with an international team of energy experts that offer a unique blend of global capabilities and local expertise.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Groep Infrabo	Exact match	Westerlo, BelgiumHQ recorded Oct 12, 2026	11-50	30 contacts →
	Exact match “With over 40 years of experience in building technologies, sustainability, infrastructure, and water management, Groep Infrabo is an independent engineering and consultancy firm…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Misko Ingénieurs-Conseils	Exact match	Bastogne, BelgiumHQ recorded Oct 12, 2026	11-50	26 contacts →
	Exact match “Le bureau Misko ingénieurs-conseils est spécialisé dans les études énergétiques et techniques du bâtiment.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Group VHC	Exact match	Overijse, BelgiumHQ recorded Oct 12, 2026	51-200	24 contacts →
	Exact match “Group VHC zorgt al meer dan 25 jaar voor slimme oplossingen in verwarming, koeling, ventilatie en zonne energie.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Coretec Energy	Exact match	Angleur, BelgiumHQ recorded Oct 12, 2026	11-50	24 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	Soltis	Exact match	Evere, BelgiumHQ recorded Oct 12, 2026	11-50	24 contacts →
	Exact match “Soltis est une entreprise créée en 2008 qui accompagne professionnels et particuliers dans la mise en place de solutions vertes et rentables avec un seul but: améliorer…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	cozie.be	Exact match	België, BelgiumHQ recorded Oct 12, 2026	51-200	24 contacts →
	Exact match “Cozie \| Durable Comfort Cozie is a vibrant company that works with ENGIE to combine the energy and dynamism of a start-up with the technical competence & long-term vision of an…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Delpower	Exact match	Thimister-clermont, BelgiumHQ recorded Oct 12, 2026	11-50	23 contacts →
	Exact match “DELPOWER is an energy efficiency engineering company dedicated to optimising energy costs for tertiary and industrial customers.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Ecopuur	Exact match	9850, BelgiumHQ recorded Oct 12, 2026	11-50	22 contacts →
	Exact match “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Raco By Studibo	Exact match	Heusden-zolder, BelgiumHQ recorded Oct 12, 2026	11-50	21 contacts →
	Exact match “Bij Raco by Studibo ondersteunen we bouwprojecten met studies van technische installaties, advies en projectbegeleiding.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy efficiency engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 298 energy efficiency engineering firms based in Belgium

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Energy efficiency engineering firms based in Belgium at a glance

As of Oct 12, 2026

19.5%Verified-email coverage

46.4Average contacts per company

1-10Median size (employees)

6.0%Largest-city concentration · Brussels

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

198

11-50

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 298 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Belgium whose business descriptions match “energy efficiency engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,700 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy efficiency engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficiency engineering firms are there based in Belgium?

RevenueBase identified 298 company matches for energy efficiency engineering firms associated with Belgium as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Equans Belux tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy efficiency engineering firms?

Brussels leads with 18 company records, followed by Ghent (10) and Antwerp (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,700 professional contacts with verified work emails tracked across these 298 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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 SmartSearch, 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.