Company lists · Data refreshed September 2026
Top 25 Net zero consulting firms based in Belgium
RevenueBase identified 70 net zero consulting firms headquartered in Belgium as of September 2026 and tracks 632 professional contacts across them, including 239 with verified work emails and 21 with mobile numbers. Brussels is the largest hub.
This list covers net zero 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, 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 net zero consulting firms based in Belgium
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 76 | ||||
“Founded in 2006, HINICIO is a strategic consulting firm specialized in the decarbonization challenges of hard-to-abate sectors, with more than 20 years of experience in hydrogen…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 64 | ||||
“CLIMACT empowers organizations, cities and public authorities to understand climate change and to achieve a zero-carbon sustainable society by 2050.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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. | |||||
| 4 | 29 | ||||
“Tapio helps businesses understand and reduce their carbon footprint through a carbon management software and a team of experts.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 24 | ||||
“CO2logic joined the South Pole Group in 2021, forming the world’s largest climate solutions provider and carbon project developer.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 24 | ||||
“Sustenuto is a strategic consulting firm that helps organisations make a difference in society by integrating sustainability at the core of their business.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 23 | ||||
“Driven by the urgency of climate action, D-Carbonize helps industrial companies turn decarbonization into a lever for performance.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 20 | ||||
“In a time of ecological challenges and economic uncertainty, businesses play a pivotal role in keeping society stable.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 18 | ||||
“World's gone nuts.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 13 | ||||
“Wij bij Exergie, willen de wereld verduurzamen.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 10 | ||||
“21 Solutions is a consulting firm active in Belgium, France, and internationally.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 10 | ||||
“RSK Energy and Climate provides consultancy support, specifically tailored to each client's needs by using know-how in the fields of- Technical energy expertise: Energy audits…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | Watt ElseIndirect evidence | 10 | |||
“Watt Else is a consultancy company specialised in sustainable energy and energy transition.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 9 | ||||
“We are planning the path to climate neutrality.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 9 | ||||
“Smart2Circle empowers companies and organizations to contribute to a carbon neutral world in 2050.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | Bureau 9000 Studie- & EnergieadviesbureauIndirect evidence | 8 | |||
“Bedrijven willen klaar zijn voor de toekomst.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 8 | ||||
“Duurzaamheidsbeleid & advies Studio D helpt u met het opstellen van een duurzaamheidsstrategie en -beleid.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 | ||||
“We delen onze jarenlange ervaring en uitgebreide kennis.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | VLTNIndirect evidence | 6 | |||
“Anticipating change is a key requirement for any industry; even more for a very complex one such as the logistics industry.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 6 | ||||
“There’s climate technology.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 5 | ||||
“At Klareco, we believe that energy is a valuable asset that must be preserved for tomorrow by using it efficiently today.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | TurpeaIndirect evidence | 5 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 | ||||
“E-Luse assists large (industrial) companies and SMEs in their mission to make their business more sustainable.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | Willow SustainabilityIndirect evidence | 4 | |||
“Willow is a sustainability advisory firm working with awesome companies in a variety of fascinating fields, from impact investing to retail, fashion, and telecommunications.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 70 net zero consulting firms based in Belgium
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Net zero consulting firms 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 net zero consulting firms, 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 “net zero consulting firms”. 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 net zero 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 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, 239 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 net zero consulting firms are there based in Belgium?
RevenueBase identified 70 net zero 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?
Hinicio, headquartered in Brussels, tops this list with the largest team on record.
Which city has the most net zero consulting firms?
Brussels leads with 11 headquartered companies, followed by Liege (5) and Antwerp (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 239 verified decision-maker contacts tracked across these 70 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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