Company lists · Data refreshed September 2026

Top 25 Energy efficiency service companies based in Belgium

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 152 companies tracked

RevenueBase identified 152 energy efficiency service companies headquartered in Belgium as of September 2026 and tracks 6,880 professional contacts across them, including 2,309 with verified work emails. Gent is the largest hub.

This list covers energy efficiency service 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 16, 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 16, 2026 86% judged on-target in blind review

152Companies

6,880Contacts tracked

2,309Verified emails

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The 25 largest energy efficiency service companies based in Belgium

Ranked by team size

Top 25 of 152 energy efficiency service companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency service 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	Equans Belux	Indirect evidence	Brussels, BelgiumHQ checked Sep 16, 2026	5,001-10,000	5,297 contacts →
	Indirect evidence “What if you could use your talent to contribute to the great challenges of tomorrow?” Source: RevenueBase Database · checked Sep 16, 2026
2	Smappee	Partial evidence	Harelbeke, BelgiumHQ checked Sep 16, 2026	51-200	120 contacts →
	Partial evidence “Smappee is an energy technology company.” Source: RevenueBase Database · checked Sep 16, 2026
3	INDEA	Partial evidence	Aalst, BelgiumHQ checked Sep 16, 2026	n/a	115 contacts →
	Partial evidence “Wij helpen industriële bedrijven hun energiekosten te verminderen.” Source: RevenueBase Database · checked Sep 16, 2026
4	Reno Energy	Partial evidence	Liège (angleur), BelgiumHQ checked Sep 16, 2026	51-200	106 contacts →
	Partial evidence “Reno Energy est une entreprise spécialisée dans le secteur de la rénovation énergétique mais aussi dans la nouvelle construction.” Source: RevenueBase Database · checked Sep 16, 2026
5	Deplasse	Indirect evidence	Watermael-boitsfort, BelgiumHQ checked Sep 16, 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 16, 2026
6	Luminus Solutions	Partial evidence	Bruxelles, BelgiumHQ checked Sep 16, 2026	11-50	61 contacts →
	Partial evidence “Together, let’s take on the energy transition challenge!” Source: RevenueBase Database · checked Sep 16, 2026
7	CES Group	Partial evidence	Asse, BelgiumHQ checked Sep 16, 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 16, 2026
8	MR Solar	Strong evidence	Zwevegem, BelgiumHQ checked Sep 16, 2026	51-200	51 contacts →
	Strong 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 16, 2026
9	The Energy Circle	Partial evidence	Hasselt, BelgiumHQ checked Sep 16, 2026	201-500	40 contacts →
	Partial evidence “Van onderhoud & monitoring, elektrische installaties & groene stroom, tot waterbeheer & HVAC-systemen: The Energy Circle heeft alle expertise in huis om grote gebouwen en…” Source: RevenueBase Database · checked Sep 16, 2026
10	Bureau D'études A Concept	Indirect evidence	Liège, BelgiumHQ checked Sep 16, 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 16, 2026
11	Coretec Energy	Indirect evidence	Angleur, BelgiumHQ checked Sep 16, 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 16, 2026
12	Delpower	Strong evidence	Thimister-clermont, BelgiumHQ checked Sep 16, 2026	11-50	24 contacts →
	Strong evidence “DELPOWER is an energy efficiency engineering company dedicated to optimising energy costs for tertiary and industrial customers.” Source: RevenueBase Database · checked Sep 16, 2026
13	Group VHC	Partial evidence	Overijse, BelgiumHQ checked Sep 16, 2026	51-200	24 contacts →
	Partial evidence “Group VHC zorgt al meer dan 25 jaar voor slimme oplossingen in verwarming, koeling, ventilatie en zonne energie.” Source: RevenueBase Database · checked Sep 16, 2026
14	NOVEN	Indirect evidence	Gent, BelgiumHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “Climate change is an urgent reality, and buildings, which are responsible for nearly 40% of the EU's GHG emissions, play a pivotal role.” Source: RevenueBase Database · checked Sep 16, 2026
15	Ecopuur	Indirect evidence	9850, BelgiumHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Source: RevenueBase Database · checked Sep 16, 2026
16	Soltis	Indirect evidence	Evere, BelgiumHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
17	cozie.be	Partial evidence	België, BelgiumHQ checked Sep 16, 2026	51-200	23 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
18	Zaman Yves & C	Indirect evidence	Gent, BelgiumHQ checked Sep 16, 2026	51-200	21 contacts →
	Indirect evidence “Zaman is een professionele technisch dienstverlener voor installaties op de professionele en industriële markt.” Source: RevenueBase Database · checked Sep 16, 2026
19	ODOT	Partial evidence	Schoten, BelgiumHQ checked Sep 16, 2026	11-50	21 contacts →
	Partial evidence “Odot optimises energy management for businesses and specialises in Energy Contract Management, consumption monitoring and customised consultancy services.” Source: RevenueBase Database · checked Sep 16, 2026
20	EMAZE	Partial evidence	Gent, BelgiumHQ checked Sep 16, 2026	11-50	18 contacts →
	Partial evidence “Emaze provides actionable energy advice for the industrial, service and public sector: Energy management - Implement an energy management system (e.g.” Source: RevenueBase Database · checked Sep 16, 2026
21	Techem Belgium - Caloribel	Partial evidence	Sint-jans-molenbeek, BelgiumHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “Europees leider in energiebeheer Techem, opgericht in 1962, is een Duitse groep die wereldwijd bekend is bij mede-eigenaren en sociale verhuurders op het gebied van energiebeheer.” Source: RevenueBase Database · checked Sep 16, 2026
22	TEM	Indirect evidence	BelgiumHQ checked Sep 16, 2026	201-500	18 contacts →
	Indirect evidence “TECHNICAL EQUIPMENT MAINTENANCE-TECHNILIFT is a construction company based out of 112 Rue de Fierlant, Forest, Belgium.” Source: RevenueBase Database · checked Sep 16, 2026
23	Isolution	Indirect evidence	Namur, BelgiumHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “ISOLUTION est une société spécialisée dans l'isolation et la ventilation de bâtiment pour particuliers et professionnels, et ce depuis plus de 12 ans Aujourd'hui, Isolution compte…” Source: RevenueBase Database · checked Sep 16, 2026
24	Alfasun	Indirect evidence	Ninove, BelgiumHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “nergie zonder zorgen Ga je bouwen?” Source: RevenueBase Database · checked Sep 16, 2026
25	MCS Solutions	Indirect evidence	Antwerp, BelgiumHQ checked Sep 16, 2026	201-500	17 contacts →
	Indirect evidence “MCS Solutions was acquired by Nemetschek in 2018 and rebranded with Spacewell in 2019.” Source: RevenueBase Database · checked Sep 16, 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 efficiency service 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 energy efficiency service companies.
Partial evidence: Its own public description names part of energy efficiency service companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency service 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 152 energy efficiency service companies based in Belgium

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Energy efficiency service companies based in Belgium at a glance

As of Sep 16, 2026

33.6%Verified-email coverage

45.3Average contacts per company

1-10Median size (employees)

3.3%Largest-city concentration · Gent

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

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 152 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 efficiency service 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 “energy efficiency service 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 energy efficiency service 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 energy efficiency service 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, 2,309 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 16, 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.

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 efficiency service 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 energy efficiency service companies are there based in Belgium?

RevenueBase identified 152 energy efficiency service 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?

Equans Belux, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most energy efficiency service companies?

Gent leads with 5 headquartered companies, followed by Antwerpen (4) and Aalst (3).

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 2,309 verified decision-maker contacts tracked across these 152 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 16, 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.