Company lists · Data refreshed September 2026

Top 25 Energy efficiency consulting firms based in Belgium

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

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 206 companies tracked

RevenueBase identified 206 company matches for energy efficiency consulting firms associated with Belgium as of September 2026 and tracks 1,874 professional contacts across them, including 623 with verified work emails and 44 with mobile numbers. Brussels is the largest hub.

This list covers company matches for energy efficiency consulting 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 September 2, 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 Sep 2, 2026 How this list was built

206Companies

1,874Contacts tracked

623Verified emails

44Mobile numbers

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The 25 largest energy efficiency consulting firms based in Belgium

Ranked by team size

Top 25 of 206 company matches for energy efficiency consulting firms based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 2, 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	Smappee	Exact match	Harelbeke, Belgium	51-200	129 contacts →
	Exact match “Smappee is an award-winning global cleantech company that aims to save its customers energy and money by reducing energy consumption and improving energy efficiency.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
2	Reno Energy	Exact match	Haren, Belgium	51-200	105 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 · Sep 2, 2026 · View company records in RevenueBase
3	E&c Consultants	Exact match	Kortrijk, Belgium	51-200	100 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 · Sep 2, 2026 · View company records in RevenueBase
4	Deplasse	Exact match	Watermael-Boitsfort, Belgium	51-200	68 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 · Sep 2, 2026 · View company records in RevenueBase
5	Luminus Solutions	Exact match	Hoegaarden, Belgium	11-50	61 contacts →
	Exact match “Together, let’s take on the energy transition challenge!” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
6	CES Group	Exact match	Mons, Belgium	51-200	54 contacts →
	Exact match “CES provides a consulting service in the areas of energy, technical installations and processing.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
7	Broptimize Energy	Exact match	Remicourt, Belgium	51-200	51 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 · Sep 2, 2026 · View company records in RevenueBase
8	AYA	Exact match	Etterbeek Brussels, Belgium	11-50	46 contacts →
	Exact match “AYA is an integrated network of forward-thinking Energy Managers that will help your company develop a comprehensive energy policy.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
9	MK Engineering	Exact match	Brussels, Belgium	11-50	35 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 · Sep 2, 2026 · View company records in RevenueBase
10	Bureau D'études A Concept	Exact match	Liege, Belgium	11-50	34 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 · Sep 2, 2026 · View company records in RevenueBase
11	Coretec Energy	Exact match	Angleur, Belgium	11-50	26 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 · Sep 2, 2026 · View company records in RevenueBase
12	Delpower	Exact match	Belgium	11-50	24 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 · Sep 2, 2026 · View company records in RevenueBase
13	Ecopuur	Exact match	Drongen, Belgium	11-50	23 contacts →
	Exact match “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
14	Soltis	Exact match	Evere Brussels, Belgium	11-50	23 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 · Sep 2, 2026 · View company records in RevenueBase
15	Istema NV	Exact match	Ghent, Belgium	11-50	21 contacts →
	Exact match “ISTEMA is een gespecialiseerd ingenieurs- en studiebureau voor technieken en energie in gebouwen.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
16	cozie.be	Exact match	Genval, Belgium	51-200	21 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 · Sep 2, 2026 · View company records in RevenueBase
17	Cenergie	Exact match	Antwerp, Belgium	11-50	20 contacts →
	Exact match “CENERGIE delivers consulting, design, engineering and project management services for energy-efficient and sustainable buildings during their entire lifecycle.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
18	ODOT	Exact match	Schoten, Belgium	11-50	20 contacts →
	Exact match “Odot optimises energy management for businesses and specialises in Energy Contract Management, consumption monitoring and customised consultancy services.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
19	Trinergy	Exact match	Belgium	11-50	19 contacts →
	Exact match “Energy Management Software.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
20	EMAZE	Exact match	Ghent, Belgium	11-50	17 contacts →
	Exact match “Emaze provides actionable energy advice for the industrial, service and public sector: Energy management - Implement an energy management system (e.g.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
21	Alfasun	Exact match	Ghent, Belgium	11-50	17 contacts →
	Exact match “nergie zonder zorgen Ga je bouwen?” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
22	Peritas	Exact match	Brussels, Belgium	11-50	17 contacts →
	Exact match “Bij Peritas bieden we onze klanten niet alleen betrouwbare, energie-efficiënte oplossingen voor hun engineeringprojecten, maar zetten we ook in op innovatie en efficiëntie.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
23	Wattson NV	Exact match	Ghent, Belgium	11-50	16 contacts →
	Exact match “Wattson maakt van gebouwen de gangmakers van de energietransitie.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
24	Dnergy	Exact match	Belgium	11-50	16 contacts →
	Exact match “At dnergy ®, we are committed to enabling asset and facility managers to enhance their building portfolios' energy efficiency and proactive compliance through our innovative dEEP…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
25	Matriciel	Exact match	Louvain-La-Neuve, Belgium	11-50	15 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 2, 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 consulting 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 206 energy efficiency consulting firms based in Belgium

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Energy efficiency consulting firms based in Belgium at a glance

As of Sep 2, 2026

33.2%Verified-email coverage

2.3%Mobile-number coverage

9.1Average contacts per company

1-10Median size (employees)

5.8%Largest-city concentration · Brussels

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

147

11-50

51-200

201-500

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 consulting 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 623 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 September 2, 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 consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 206 company matches for energy efficiency consulting firms associated with Belgium as of September 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?

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

Which city has the most energy efficiency consulting firms?

Brussels leads with 12 company records, followed by Ghent (11) and Liege (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 623 professional contacts with verified work emails tracked across these 206 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 September 2, 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.