Company lists · Data refreshed September 2026
Top 25 Sustainability and climate change consulting firms based in Barcelona, Spain
RevenueBase identified 99 sustainability and climate change consulting firms headquartered in Barcelona, Spain as of September 2026 and tracks 2,626 professional contacts across them, including 233 with verified work emails. Madrid is the largest hub.
This list covers sustainability and climate change consulting 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 21, 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 sustainability and climate change consulting firms based in Barcelona, Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 418 contacts → | ||||
Indirect evidence “Founded in 1994, in Barcelona, Spain, Amphos21 includes three companies in Spain (1994), Chile (2009) and Peru (2012).” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 237 contacts → | ||||
Indirect evidence “Empresa líder ibérica de servicios profesionales en ingeniería, arquitectura, medio ambiente y sostenibilidad.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 174 contacts → | ||||
Indirect evidence “Impulsamos la sostenibilidad empresarial con soluciones técnicas y reales.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 88 contacts → | ||||
Indirect evidence “At SGA, we specialize in comprehensive project management, offering customized solutions that allow each client to efficiently achieve their objectives.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 35 contacts → | ||||
Partial evidence “ESOLVE is an environmental consulting and engineering company that provides a wide range of professional services to private sector companies and public organizations for the…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 33 contacts → | ||||
Strong evidence “With over 20 years of expertise in the environmental sector, ERF-Energy and Sustainability is a significant firm in the strategic environmental consulting industry that it has…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 30 contacts → | ||||
Indirect evidence “En Deplan llevamos más de 30 años ofreciendo soluciones de ingeniería, consultoría ambiental y sostenibilidad para empresas y organizaciones.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 27 contacts → | ||||
Indirect evidence “Somos una consultora especializada en el ámbito energético y sostenibilidad.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 25 contacts → | ||||
Indirect evidence “Minuartia és una empresa de consultoria ambiental amb una sòlida trajectòria de 25 anys d'experiència.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 24 contacts → | ||||
Indirect evidence “Consultora energética dedicada al desarrollo de proyectos de Eficiencia Energética y Energías Renovables.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 16 contacts → | ||||
Indirect evidence “WORSLEY Acceleration Services is a consultancy boutique with a highly experienced team of professionals, focused on bringing disruptive solutions to lay the foundation for current…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 13 contacts → | ||||
Indirect evidence “Antonomasia es la primera agencia de publicidad y comunicación en España especializada en hábitat y arquitectura sostenibles.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 contacts → | ||||
Indirect evidence “Since 2005 we have believed that we all need to do our part crafting a better, more sustainable, creative and uplifting world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 contacts → | ||||
Indirect evidence “Ferdinand Consultants are thought leaders in creating a positive impact.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Strong evidence “We are a services company focused on sustainability and on fighting climate change.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Indirect evidence “Potenciamos la sostenibilidad de tu proyecto en el marco de los ODS.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Indirect evidence “HONU PROJECTS es una consultoría especializada en sostenibilidad turística, donde ayudamos a las empresas a identicar su posición actual en términos de sostenibilidad, ponemos en…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Indirect evidence “Develop nació en el año 2010.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “DATAMBIENT somos una empresa de consultoría que desarrollamos proyectos dentro del área de ingeniería y gestión del medio ambiente, especializada en el ámbito de residuos.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 contacts → | ||||
Indirect evidence “SBA es una consultoría e ingeniería medioambiental, especializada en Gestión del Medio Ambiente y del Territorio.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 5 contacts → | ||||
Indirect evidence “Consultoría, formación e investigación para transformar el entorno construido con sostenibilidad integral y enfoque regenerativo.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 contacts → | ||||
Indirect evidence “Som un estudi d’arquitectura de Barcelona especialitzat en sostenibilitat, ecoeficiència i projectes impulsats per valors, tant en l’espai públic com privat.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Indirect evidence “La necesidad de cambiar sector de la restauración ya es innegable.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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 21, 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: sustainability and climate change consulting 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 sustainability and climate change consulting firms.
- Partial evidence
- Its own public description names part of sustainability and climate change consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name sustainability and climate change consulting 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 99 sustainability and climate change consulting firms based in Barcelona, Spain
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Sustainability and climate change consulting firms based in Barcelona, Spain at a glance
As of Sep 21, 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 99 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 sustainability and climate change consulting 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 “sustainability and climate change consulting 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 sustainability and climate change consulting 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 sustainability and climate change consulting 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, 233 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 21, 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.
Sustainability and climate change consulting firms by metro in Spain
- Sustainability and climate change consulting firms in Madrid147
- Sustainability and climate change consulting firms in Barcelona99
- Sustainability and climate change consulting firms in Valencia27
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 sustainability and climate change consulting 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 sustainability and climate change consulting firms are there based in Barcelona, Spain?
RevenueBase identified 99 sustainability and climate change consulting 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?
Amphos 21, headquartered in Barcelona, tops this list with the largest team on record.
Which city has the most sustainability and climate change consulting firms?
Madrid leads with 147 headquartered companies, followed by Barcelona (99) and Valencia (27).
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 233 verified decision-maker contacts tracked across these 99 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 21, 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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