Company lists · Data refreshed September 2026

Top 25 Energy auditing and consulting firms based in Belgium

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 203 companies tracked

RevenueBase identified 203 energy auditing and consulting firms headquartered in Belgium as of September 2026 and tracks 1,445 professional contacts across them, including 476 with verified work emails. Gent is the largest hub.

This list covers energy auditing and consulting firms 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 28, 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 28, 2026 86% judged on-target in blind review

203Companies

1,445Contacts tracked

476Verified emails

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The 25 largest energy auditing and consulting firms based in Belgium

Ranked by team size

Top 25 of 203 energy auditing and consulting firms based in Belgium, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy auditing and consulting firms: 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 28, 2026	n/a	115 contacts →
	Partial evidence “Wij helpen industriële bedrijven hun energiekosten te verminderen.” Source: RevenueBase Database · checked Sep 28, 2026
2	E&c Consultants	Partial evidence	Kortrijk, BelgiumHQ checked Sep 28, 2026	51-200	100 contacts →
	Partial 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 28, 2026
3	Deplasse	Indirect evidence	Watermael-boitsfort, BelgiumHQ checked Sep 28, 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 28, 2026
4	CES Group	Strong evidence	Asse, BelgiumHQ checked Sep 28, 2026	51-200	56 contacts →
	Strong evidence “CES provides a consulting service in the areas of energy, technical installations and processing.” Source: RevenueBase Database · checked Sep 28, 2026
5	Broptimize Energy	Indirect evidence	Remicourt, BelgiumHQ checked Sep 28, 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 28, 2026
6	Bureau D'études A Concept	Indirect evidence	Liège, BelgiumHQ checked Sep 28, 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 28, 2026
7	Coretec Energy	Indirect evidence	Angleur, BelgiumHQ checked Sep 28, 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 28, 2026
8	Misko Ingénieurs-Conseils	Indirect evidence	Bastogne, BelgiumHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “Le bureau Misko ingénieurs-conseils est spécialisé dans les études énergétiques et techniques du bâtiment.” Source: RevenueBase Database · checked Sep 28, 2026
9	Delpower	Partial evidence	Thimister-clermont, BelgiumHQ checked Sep 28, 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 28, 2026
10	Ecopuur	Indirect evidence	9850, BelgiumHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Source: RevenueBase Database · checked Sep 28, 2026
11	Helexia Belgium	Partial evidence	Antwerpen, BelgiumHQ checked Sep 28, 2026	201-500	23 contacts →
	Partial evidence “Helexia is your all-in-one partner for accelerating your energy transition.” Source: RevenueBase Database · checked Sep 28, 2026
12	ODOT	Partial evidence	Schoten, BelgiumHQ checked Sep 28, 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 28, 2026
13	Istema NV	Partial evidence	Gent, BelgiumHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “ISTEMA is een gespecialiseerd ingenieurs- en studiebureau voor technieken en energie in gebouwen.” Source: RevenueBase Database · checked Sep 28, 2026
14	EMAZE	Partial evidence	Gent, BelgiumHQ checked Sep 28, 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 28, 2026
15	Techem Belgium - Caloribel	Partial evidence	Sint-jans-molenbeek, BelgiumHQ checked Sep 28, 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 28, 2026
16	Peritas	Partial evidence	Antwerp, BelgiumHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “Bij Peritas bieden we onze klanten niet alleen betrouwbare, energie-efficiënte oplossingen voor hun engineeringprojecten, maar zetten we ook in op innovatie en efficiëntie.” Source: RevenueBase Database · checked Sep 28, 2026
17	Mijnepb	Indirect evidence	Gent, BelgiumHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “MijnEPB helpt architect en bouwheer met de nodige engineering voor hun project.” Source: RevenueBase Database · checked Sep 28, 2026
18	Dnergy	Partial evidence	Brussels, BelgiumHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
19	Wattson NV	Partial evidence	Ghent, BelgiumHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “Wattson maakt van gebouwen de gangmakers van de energietransitie.” Source: RevenueBase Database · checked Sep 28, 2026
20	Matriciel	Partial evidence	Louvain-la-neuve, BelgiumHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
21	A2e Bureau D'études	Partial evidence	Wavre, BelgiumHQ checked Sep 28, 2026	1-10	15 contacts →
	Partial evidence “Bureau spécialisé dans l’énergie et l’environnement- Energies renouvelables - Audit énergétique - Performance énergétique des bâtiments (PEB)- Techniques spéciales - Conception…” Source: RevenueBase Database · checked Sep 28, 2026
22	Denercon	Strong evidence	Berchem, BelgiumHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “Denercon is an energy consulting company created by Michaël Deneve and is based in Antwerp, Belgium.” Source: RevenueBase Database · checked Sep 28, 2026
23	Exergie Part Of UEG	Indirect evidence	Beringen, BelgiumHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Wij bij Exergie, willen de wereld verduurzamen.” Source: RevenueBase Database · checked Sep 28, 2026
24	2b-Safe	Indirect evidence	Glabbeek, BelgiumHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Ingenieurs en adviesbureau gespecialiseerd in de bouwsector en actief over heel België.” Source: RevenueBase Database · checked Sep 28, 2026
25	Immopass	Indirect evidence	Bruxelles, BelgiumHQ checked Sep 28, 2026	1-10	12 contacts →
	Indirect evidence “Que vous soyez futur acquéreur, propriétaire d’une maison, co-propriétaire dans un immeubles à appartements ou encore gestionnaire de biens immobiliers, ImmoPass apporte de la…” Source: RevenueBase Database · checked Sep 28, 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 auditing and consulting firms. 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 auditing and consulting firms.
Partial evidence: Its own public description names part of energy auditing and consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy auditing and consulting firms. 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 203 energy auditing and consulting firms based in Belgium

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Energy auditing and consulting firms based in Belgium at a glance

As of Sep 28, 2026

32.9%Verified-email coverage

7.1Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · Gent

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

157

11-50

51-200

201-500

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 203 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 auditing and consulting firms, 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 auditing and consulting firms”. 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 auditing and consulting firms), 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 auditing and consulting firms, 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, 476 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 28, 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 auditing and consulting firms, 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 auditing and consulting firms are there based in Belgium?

RevenueBase identified 203 energy auditing and consulting firms 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 auditing and consulting firms?

Gent leads with 10 headquartered companies, followed by Brussels (6) and Liege (5).

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 476 verified decision-maker contacts tracked across these 203 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 28, 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.