Company lists · Data refreshed September 2026
Top 25 Carbon neutral contractors based in Hungary
RevenueBase identified 113 carbon neutral contractors headquartered in Hungary as of September 2026 and tracks 656 professional contacts across them, including 162 with verified work emails. Budapest is the largest hub.
This list covers carbon neutral contractors headquartered in Hungary, 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.
The 25 largest carbon neutral contractors based in Hungary
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 138 contacts → | ||||
Indirect evidence “More than 35 years of engineering experience, extensive professional knowledge, service excellence, cost efficiency, reliability and dynamism – this is Óbuda Group.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 52 contacts → | ||||
Indirect evidence “Körös Consult is one of Hungary’s leading building services design consultancy practices.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 27 contacts → | ||||
Indirect evidence “Paulinyi & Partners is one of Hungary’s leading engineering and architectural groups, with over 35 years of experience in sustainable, future-oriented design.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 27 contacts → | ||||
Indirect evidence “Greenbors Consulting is an independent private consultancy service company focusing on sustainable business solutions.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 27 contacts → | ||||
Indirect evidence “Realiscon is an independent real estate development services company providing professional support for real estate and infrastructure projects across a wide range of asset…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 26 contacts → | ||||
Indirect evidence “Advanced Building & Urban Design (ABUD) is consultancy firm powered by engineers, architects and researchers specialised in sustainable building and urban design.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 15 contacts → | ||||
Indirect evidence “Fields of activity: • architectural, structural engineering and complex design services • designer site supervision • expertise and consulting in architecture and structures •…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 14 contacts → | ||||
Indirect evidence “Arctic Green Engineering Services Ltd (former Mannvit Kft) is an international consultancy firm in the fields of engineering, technical services and innovation.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 11 contacts → | ||||
Indirect evidence “We are NOVU: Budapest-based architects and engineers shaping resilient, future-ready environments.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 10 contacts → | ||||
Indirect evidence “PANDA energiamenedzsment szoftver - Nagyvállalati energia audit - Energetikai szakreferens - Energetikai beruházások TAO kedvezménye - Energetikai tanúsítvány Teljes körű…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 10 contacts → | ||||
Indirect evidence “Közel 10 éves tapasztalattal az Enco Europe Kft.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 9 contacts → | ||||
Indirect evidence “Mérnökirodánkat 2015-ös megalapítása óta az a cél hajtja, hogy generálkivitelezési munkáink során olyan műszakilag kifogástalan épületeket adjunk át, melyek a megrendelő…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 9 contacts → | ||||
Indirect evidence “TIBA Architects Studio, established in 2005, is based in Budapest, Hungary.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Indirect evidence “év augusztusában alapítottuk cégünket, mely eleinte kizárólag építészeti tervezéssel, kisebb beruházások lebonyolításával foglalkozott.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 6 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Indirect evidence “Biztosítjuk vállalatok és ingatlanok teljes körű energetikai megfelelését, kiemelt fókusszal az energetikai szakreferens és audit szolgáltatásra és a hiteles energetikai…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 contacts → | ||||
Indirect evidence “Ventosus: Leading the Future of Building Services and Energy in Hungary, and beyond.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Indirect evidence “From concept to completion, we pride ourselves on precision, creativity, and a client-focused approach.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Indirect evidence “We believe the transition to a sustainable energy system is inevitable for the future of humanity in the long run.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “A Free Sun Energy egy független, teljes körű, megújuló energiával kapcsolatos megoldásokat közvetítő tanácsadó cég.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “Hiszünk a fenntarthatóságban és hiszünk abban, hogy a magyar vállalatok felé támasztott fenntarthatósági és azon belül az energiahatékonysági követelmények lehetőséget jelentenek…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Indirect evidence “The mission of our company is to facilitate the economic transformation in an environmentally friendly manner by providing consultancy services in the field of sustainable…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Indirect evidence “Your vision - our design.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Indirect evidence “We are a successfully expanding consultancy with over 16 years of experience in managing environmental-related projects with the support of experienced experts covering the fields…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
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: carbon neutral contractors. 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 carbon neutral contractors.
- Partial evidence
- Its own public description names part of carbon neutral contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name carbon neutral contractors. 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 113 carbon neutral contractors based in Hungary
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Carbon neutral contractors based in Hungary at a glance
As of Sep 16, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Hungary, so it is reported there. Company counts and contact totals on this page are exact for Hungary, over 113 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 carbon neutral contractors, 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 Hungary whose own description of what they do matches “carbon neutral contractors”. 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 carbon neutral contractors), 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 carbon neutral contractors, and records with no verified work email. Companies headquartered outside Hungary 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, 162 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.
Carbon neutral contractors by metro
- Carbon neutral contractors in Budapest44
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 carbon neutral contractors, 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 carbon neutral contractors are there based in Hungary?
RevenueBase identified 113 carbon neutral contractors headquartered in Hungary 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?
Óbuda Group, headquartered in Hungary, tops this list with the largest team on record.
Which city has the most carbon neutral contractors?
Budapest leads with 44 headquartered companies, followed by Szeged (6) and Debrecen (3).
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 162 verified decision-maker contacts tracked across these 113 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.
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