Company lists · Data refreshed September 2026
Top 25 Renewable energy consultancy companies based in Belgium
RevenueBase identified 323 renewable energy consultancy companies headquartered in Belgium as of September 2026 and tracks 2,692 professional contacts across them, including 831 with verified work emails and 54 with mobile numbers. Brussels is the largest hub.
This list covers renewable energy consultancy 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest renewable energy consultancy companies based in Belgium
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 250 | ||||
“Eneco Belgium is a sustainable energy provider.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 128 | ||||
“AESA is a leading European management consultancy, providing technical assistance and project management services in Low and Middle income countries as well as in Transition…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 101 | ||||
“Depuis 2005, notre objectif est d’accompagner nos clients dans la transition énergétique de leurs bâtiments privés ou professionnels.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | E&c ConsultantsStrong evidence | 100 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 74 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | OptecoIndirect evidence | 58 | |||
“Met een ervaring van meer dan installaties heeft het management van Opteco de nodige kennis in huis om uw project te realiseren.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 56 | ||||
“CES provides a consulting service in the areas of energy, technical installations and processing.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 53 | ||||
“EnergyKing werd in 2013 opgericht door twee ingenieurs: Lucas & Wiet.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 51 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 48 | ||||
“Zonnepanelen, batterijen, laadinfrastructuur slimme sturingen en warmte- en koeloplossingen?” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 45 | ||||
“At Insaver, we guide you every step of the way toward a low-carbon future.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 38 | ||||
“A+ Concept est un bureau d'études composé d'experts énergétiques et ingénieurs spécialisés dans les techniques du bâtiment.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 35 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 34 | ||||
“Consultes is een allround partner voor bedrijven op vlak van milieu, preventie, energie en duurzaamheid.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 30 | ||||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 28 | ||||
“DR(EA)²M est un bureau d’études spécialisé dans les matières du développement territorial, de l’aménagement urbain et paysager, de l’environnement, de l’architecture et de…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 26 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | We Green BelgiumIndirect evidence | 24 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 | ||||
“Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 23 | ||||
“Helexia is your all-in-one partner for accelerating your energy transition.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 22 | ||||
“As specialists in the field of renewable energy and energy efficiency, we offer unique proposals to both individuals and businesses.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 21 | ||||
“Bij Raco by Studibo ondersteunen we bouwprojecten met studies van technische installaties, advies en projectbegeleiding.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 20 | ||||
“has been active in realizing sustainable projects in Belgium and our neighboring countries since 2012.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 18 | ||||
“Axilium is een technisch studiebureau dat waarde hecht aan innovatie, duurzaamheid en kwaliteit.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 17 | ||||
“We advise established global energy businesses, start-ups, governments and international organisations on all aspects of the energy commodity trading and market rules.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 323 renewable energy consultancy companies based in Belgium
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Renewable energy consultancy companies based in Belgium at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 renewable energy consultancy companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Belgium whose own description of what they do matches “renewable energy consultancy companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among renewable energy consultancy 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 an evidence 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, 831 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 5, 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
How many renewable energy consultancy companies are there based in Belgium?
RevenueBase identified 323 renewable energy consultancy 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?
Eneco Belgium, headquartered in Mechelen, tops this list with the largest team on record.
Which city has the most renewable energy consultancy companies?
Brussels leads with 22 headquartered companies, followed by Bruxelles (8) and Mechelen (6).
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 831 verified decision-maker contacts tracked across these 323 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 5, 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.
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