Company lists · Data refreshed September 2026
Top 25 Building decarbonization firms based in Barcelona, Spain
RevenueBase identified 73 building decarbonization firms headquartered in Barcelona, Spain as of September 2026 and tracks 1,170 professional contacts across them, including 139 with verified work emails. Madrid is the largest hub.
This list covers building decarbonization firms headquartered in Barcelona, Spain, 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 building decarbonization firms based in Barcelona, Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 351 contacts → | ||||
Indirect evidence “Ingeniería y Consultoría Energética orientada a la búsqueda y el desarrollo de soluciones energéticas de alta eficiencia para sus Clientes.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 198 contacts → | ||||
Indirect evidence “PGI Engineering & Consulting es una empresa global de servicios de ingeniería y consultoría que trabaja transversalmente para dar las mejores soluciones técnicas de diseño a…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 29 contacts → | ||||
Indirect evidence “Inergy tiene como misión contribuir al ahorro energético de sus clientes, reduciendo su factura energética, y favoreciendo al mismo tiempo la mitigación del cambio climático.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 27 contacts → | ||||
Indirect evidence “Somos una consultora especializada en el ámbito energético y sostenibilidad.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 27 contacts → | ||||
Indirect evidence “Enertika is a leading consulting company in the Spanish market about Energy Efficiency.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 21 contacts → | ||||
Indirect evidence “GSE es una consultoría de ámbito nacional, especializada en la reducción de costes energéticos de las empresas con la implementación del protocolo de eficiencia energética…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 20 contacts → | ||||
Indirect evidence “Somos Alotark.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 15 contacts → | ||||
Indirect evidence “Biosphere Flux es una empresa de la nueva economía, formada por jóvenes emprendedores y que está resuelta en el fomento de las tecnologías en EFICIENCIA ENERGÉTICA y en la…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 12 contacts → | ||||
Indirect evidence “Desde 2009, GreenFlex es el socio clave en la transformación energética, medioambiental y social de las organizaciones, permitiéndoles cambiar su trayectoria hacia una economía…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 9 contacts → | ||||
Indirect evidence “SOREN Energia és una Empresa de Serveis Energètics (ESE).” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 contacts → | ||||
Indirect evidence “EAS offers a whole range of solutions for data center energy optimization to reduce cost and be eco-responsible EAS provides installation, configuration and support of the EAR…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 5 contacts → | ||||
Indirect evidence “EFITEKNA es una consultoría energética con una amplia experiencia en Optimización y Desarrollo de proyectos energéticos en España, Portugal, Sudamérica y Asia.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 contacts → | ||||
Indirect evidence “Engineering, Architecture and Energy Efficiency Services.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 4 contacts → | ||||
Indirect evidence “TDI es una ingeniería especializada en la gestión integral de proyectos de instalaciones y de estructuras, así como en la auditoría de eficiencia energética y sostenibilidad…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3 contacts → | ||||
Indirect evidence “ZEST architecture is a team of multilingual architects in Barcelona, specialized in the design and construction of beautiful, sustainable and energy efficient homes around the…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3 contacts → | ||||
Indirect evidence “Off Energy Consulting es una consultoría energética especializada en la gestión, optimización y reducción de costes en los contratos de suministro de electricidad y gas.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 3 contacts → | ||||
Partial evidence “Praxis Resilient Buildings is an engineering and consultancy practice, based in Barcelona, Spain.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 contacts → | ||||
Indirect evidence “Empresa consultora en eficiencia energética desde 2010, ROZO apoya a sus clientes a largo plazo para reducir de forma durable sus costes energéticos y su huella medioambiental.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Indirect evidence “Energreen Design es una actividad de consultoría y divulgación en ámbito de construcción sostenible, reforma de edificios, diseño pasivo, eficiencia energética y economía circular.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Indirect evidence “En UNIVERSAL ENERGY SERVICE somos asesores energéticos para empresas y particulares.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “Soleco nace en como consecuencia de la primera crisis del petróleo, y surge a partir del reto tecnológico de incorporar a nuestro desarrollo el aprovechamiento de fuentes de…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “En nuestra empresa nos dedicamos a la realización de proyectos de instalaciones, consultoría, certificaciones y auditorías energéticas, legalizaciones y licencias.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Indirect evidence “EcoAct, es una consultora internacional y desarrolladora de proyectos, que ayuda a las organizaciones a lograr el éxito en sus ambiciones relacionadas con el clima.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence “Una de las principales preocupaciones de toda Empresa, es tener la capacidad de generar su máximo potencial productivo, sin mermar la calidad del producto final y consiguiendo…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence “Ofrecemos servicios para mitigar los efectos del cambio climático y contribuir a la transición energética de organizaciones, industrias y empresas mediante dos vectores…” 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: 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 building decarbonization firms.
- Partial evidence
- Its own public description names part of 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 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 73 building decarbonization firms based in Barcelona, Spain
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Building decarbonization firms based in Barcelona, Spain at a glance
As of Sep 16, 2026Companies by employee count
Email recency for this list is measured across the whole Spain list rather than for Barcelona, so it is reported there. Company counts and contact totals on this page are exact for Barcelona, over 73 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 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 Barcelona, Spain whose own description of what they do matches “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 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 building decarbonization firms, and records with no verified work email. Companies headquartered outside Barcelona 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, 139 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.
Building decarbonization firms by metro in Spain
- Building decarbonization firms in Madrid137
- Building decarbonization firms in Barcelona73
- Building decarbonization firms in Valencia29
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 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 building decarbonization firms are there based in Barcelona, Spain?
RevenueBase identified 73 building decarbonization firms headquartered in Barcelona, Spain 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?
AESA, headquartered in Barcelona, tops this list with the largest team on record.
Which city has the most building decarbonization firms?
Madrid leads with 137 headquartered companies, followed by Barcelona (73) and Valencia (29).
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 139 verified decision-maker contacts tracked across these 73 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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