Company lists · Data refreshed September 2026

Top 25 Commercial building decarbonization firms based in Belgium

Name: Commercial building decarbonization firms based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 131 companies tracked

RevenueBase identified 131 commercial building decarbonization firms headquartered in Belgium as of September 2026 and tracks 1,250 professional contacts across them, including 517 with verified work emails. Brussels is the largest hub.

This list covers commercial building decarbonization 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 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

131Companies

1,250Contacts tracked

517Verified emails

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The 25 largest commercial building decarbonization firms based in Belgium

Ranked by team size

Top 25 of 131 commercial building decarbonization firms 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 commercial building decarbonization 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	Smappee	Indirect evidence	Harelbeke, BelgiumHQ checked Sep 16, 2026	51-200	120 contacts →
	Indirect evidence “Smappee is an energy technology company.” Source: RevenueBase Database · checked Sep 16, 2026
2	INDEA	Indirect evidence	Aalst, BelgiumHQ checked Sep 16, 2026	n/a	115 contacts →
	Indirect evidence “Wij helpen industriële bedrijven hun energiekosten te verminderen.” Source: RevenueBase Database · checked Sep 16, 2026
3	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
4	Broptimize Energy	Indirect evidence	Remicourt, BelgiumHQ checked Sep 16, 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 16, 2026
5	Insaver	Indirect evidence	Houthalen, BelgiumHQ checked Sep 16, 2026	51-200	45 contacts →
	Indirect evidence “At Insaver, we guide you every step of the way toward a low-carbon future.” Source: RevenueBase Database · checked Sep 16, 2026
6	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
7	MK Engineering	Indirect evidence	Bruxelles, BelgiumHQ checked Sep 16, 2026	11-50	35 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
8	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
9	Delpower	Indirect evidence	Thimister-clermont, BelgiumHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect 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
10	We Green Belgium	Indirect evidence	Zaventem, BelgiumHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “We Green vise à réduire la dépendance de ses clients aux sources d'énergie non-durables afin de diminuer leurs émissions de carbone via des solutions énergétiques vertes et…” Source: RevenueBase Database · checked Sep 16, 2026
11	NOVEN	Partial evidence	Gent, BelgiumHQ checked Sep 16, 2026	11-50	24 contacts →
	Partial 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
12	D-Carbonize	Partial evidence	Brussels, BelgiumHQ checked Sep 16, 2026	11-50	23 contacts →
	Partial evidence “Driven by the urgency of climate action, D-Carbonize helps industrial companies turn decarbonization into a lever for performance.” Source: RevenueBase Database · checked Sep 16, 2026
13	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
14	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
15	Helexia Belgium	Indirect evidence	Antwerpen, BelgiumHQ checked Sep 16, 2026	201-500	23 contacts →
	Indirect evidence “Helexia is your all-in-one partner for accelerating your energy transition.” Source: RevenueBase Database · checked Sep 16, 2026
16	EMAZE	Indirect evidence	Gent, BelgiumHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect 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
17	KARNO	Indirect evidence	Brussels, BelgiumHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “Karno développe des réseaux d'énergie thermique alimentés par des sources d’énergie décarbonées pour des villes et communes, des sites industriels et des éco-quartiers.” Source: RevenueBase Database · checked Sep 16, 2026
18	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
19	Peritas	Indirect evidence	Antwerp, BelgiumHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect 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 16, 2026
20	Dnergy	Partial evidence	Brussels, BelgiumHQ checked Sep 16, 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 16, 2026
21	Wattson NV	Indirect evidence	Ghent, BelgiumHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Wattson maakt van gebouwen de gangmakers van de energietransitie.” Source: RevenueBase Database · checked Sep 16, 2026
22	Matriciel	Indirect evidence	Louvain-la-neuve, BelgiumHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect 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 16, 2026
23	Denercon	Indirect evidence	Berchem, BelgiumHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “Denercon is an energy consulting company created by Michaël Deneve and is based in Antwerp, Belgium.” Source: RevenueBase Database · checked Sep 16, 2026
24	Exergie Part Of UEG	Indirect evidence	Beringen, BelgiumHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Wij bij Exergie, willen de wereld verduurzamen.” Source: RevenueBase Database · checked Sep 16, 2026
25	Ensatec	Indirect evidence	Genk, BelgiumHQ checked Sep 16, 2026	1-10	12 contacts →
	Indirect evidence “Wij helpen jouw bedrijf van A tot Z om maatschappelijk verantwoord te ondernemen en op drie cruciale vlakken winst te boeken.” 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: commercial building decarbonization 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 commercial building decarbonization firms.
Partial evidence: Its own public description names part of commercial building decarbonization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial building decarbonization 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 131 commercial building decarbonization firms based in Belgium

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Commercial building decarbonization firms based in Belgium at a glance

As of Sep 16, 2026

41.4%Verified-email coverage

9.5Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · Brussels

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

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 131 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 commercial building decarbonization 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 “commercial building decarbonization 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 commercial building decarbonization 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 commercial building decarbonization 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, 517 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 commercial building decarbonization 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 commercial building decarbonization firms are there based in Belgium?

RevenueBase identified 131 commercial building decarbonization 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?

Smappee, headquartered in Harelbeke, tops this list with the largest team on record.

Which city has the most commercial building decarbonization firms?

Brussels leads with 7 headquartered companies, followed by Antwerpen (4) and Bruxelles (4).

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 517 verified decision-maker contacts tracked across these 131 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.