Company lists · Data refreshed September 2026

Top 25 Decarbonization consultancies based in Spain

Name: Decarbonization consultancies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,288 companies tracked

RevenueBase identified 1,288 decarbonization consultancies headquartered in Spain as of September 2026 and tracks 14,068 professional contacts across them, including 1,400 with verified work emails. Madrid is the largest hub.

This list covers decarbonization consultancies headquartered in 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 28, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

1,288Companies

14,068Contacts tracked

1,400Verified emails

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The 25 largest decarbonization consultancies based in Spain

Ranked by team size

Top 25 of 1,288 decarbonization consultancies based in Spain, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to decarbonization consultancies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Inerco	Indirect evidence	Sevilla, SpainHQ checked Sep 28, 2026	1,001-5,000	688 contacts →
	Indirect evidence “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Source: RevenueBase Database · checked Sep 28, 2026
2	Revergy	Indirect evidence	Seville, SpainHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Indirect evidence “REVERGY nace mediante un proyecto de profesionales procedentes de diferentes ámbitos del sector de las energías renovables con el fin de presentar un proyecto marcado por la…” Source: RevenueBase Database · checked Sep 28, 2026
3	Enertis Applus	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	201-500	379 contacts →
	Indirect evidence “Enertis Applus+ is a global engineering consultancy firm with extensive expertise in the renewable energy and BESS industry.” Source: RevenueBase Database · checked Sep 28, 2026
4	AESA	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	n/a	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 28, 2026
5	Anthesis ESP	Indirect evidence	Manlleu, SpainHQ checked Sep 28, 2026	201-500	337 contacts →
	Indirect evidence “Som una empresa especialitzada en sostenibilitat, aliada amb les organitzacions, territoris i persones compromesos amb un món més sostenible, als quals acompanyem en la seva…” Source: RevenueBase Database · checked Sep 28, 2026
6	Sólida	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	201-500	298 contacts →
	Indirect evidence “SÓLIDA, a Bureau Veritas Company, is an independent company founded in 2007 that provides high added-value engineering and consulting services within the renewable energy sector.” Source: RevenueBase Database · checked Sep 28, 2026
7	Global Factor	Indirect evidence	Bilbao, SpainHQ checked Sep 28, 2026	201-500	218 contacts →
	Indirect evidence “In Global Factor we started to provide professional services on the subject of climate change in the year 2004, prior to the ratification of the Kyoto Protocol or the…” Source: RevenueBase Database · checked Sep 28, 2026
8	Sm, Sistemas Medioambientales, SL	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	201-500	174 contacts →
	Indirect evidence “Impulsamos la sostenibilidad empresarial con soluciones técnicas y reales.” Source: RevenueBase Database · checked Sep 28, 2026
9	Quantica Renovables	Indirect evidence	Bollullos De La Mitación, SpainHQ checked Sep 28, 2026	201-500	162 contacts →
	Indirect evidence “QUANTICA Renovables is a company dedicated to providing cost and carbon efficiencies.” Source: RevenueBase Database · checked Sep 28, 2026
10	Imdea Energy	Indirect evidence	Móstoles, SpainHQ checked Sep 28, 2026	51-200	158 contacts →
	Indirect evidence “IMDEA Energy Institute was created in 2006 by the Regional Government of Comunidad de Madrid as non-profit Foundation to promote and carry out R&D&i activities to contribute to…” Source: RevenueBase Database · checked Sep 28, 2026
11	MAI Group	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	152 contacts →
	Indirect evidence “MAI has been in international consultancy for over 25 years driving energy and environmental project around the world, helping to design and plan reliable supply systems based on…” Source: RevenueBase Database · checked Sep 28, 2026
12	Barlovento Applus	Indirect evidence	Logroño, SpainHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Barlovento Applus+ is a global consulting, engineering, and testing company with extensive expertise in the wind industry.” Source: RevenueBase Database · checked Sep 28, 2026
13	Ingerop T3	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	1,001-5,000	122 contacts →
	Indirect evidence “We are the Spanish subsidiary of Ingérop, a leading company in France and internationally in engineering and consulting in sustainable mobility, energy transition and environment.” Source: RevenueBase Database · checked Sep 28, 2026
14	Grupo Trebol Energia	Partial evidence	Sant Joan Despi, SpainHQ checked Sep 28, 2026	51-200	84 contacts →
	Partial evidence “We are one of the leading energy business consultancies in Spain.” Source: RevenueBase Database · checked Sep 28, 2026
15	Sygris	Indirect evidence	San Sebastián De Los Reyes, SpainHQ checked Sep 28, 2026	51-200	77 contacts →
	Indirect evidence “Hi, we’re Sygris, Spain’s leader in sustainability consulting and ESG software.” Source: RevenueBase Database · checked Sep 28, 2026
16	Engel Energy	Indirect evidence	Barberá, SpainHQ checked Sep 28, 2026	201-500	76 contacts →
	Indirect evidence “Hola, somos Engel Energy y hacemos the good-good energy.” Source: RevenueBase Database · checked Sep 28, 2026
17	Tauw Iberia	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	65 contacts →
	Indirect evidence “Tauw Iberia is an independent environmental consultancy and engineering company established in 1989.” Source: RevenueBase Database · checked Sep 28, 2026
18	Sferaone	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	61 contacts →
	Indirect evidence “SferaOne, parte del Grupo Diggia, es una empresa que realiza actividades de proyección global desde 2002, especializada en la transición Energética desarrollando trabajos de…” Source: RevenueBase Database · checked Sep 28, 2026
19	Azigrene Energy Consulting	Indirect evidence	Valencia/valència, SpainHQ checked Sep 28, 2026	51-200	58 contacts →
	Indirect evidence “Azigrene es una empresa de servicios de Consultoría e Ingeniería Energética, que desarrolla su actividad en- Reducción del coste: Definición de la mejor estrategia de compra…” Source: RevenueBase Database · checked Sep 28, 2026
20	TECAM	Indirect evidence	Polinyà, SpainHQ checked Sep 28, 2026	51-200	56 contacts →
	Indirect evidence “Customized solutions for waste valorization and emissions treatment.” Source: RevenueBase Database · checked Sep 28, 2026
21	Kepler Ingeniería Y Ecogestión	Indirect evidence	Burgos, SpainHQ checked Sep 28, 2026	51-200	54 contacts →
	Indirect evidence “Soluciones a las empresas en la Preservación Medio Ambiente, Energías Renovables y BioGas.” Source: RevenueBase Database · checked Sep 28, 2026
22	Bettergy	Indirect evidence	Málaga, SpainHQ checked Sep 28, 2026	11-50	52 contacts →
	Indirect evidence “betterenergy Ponemos tus datos energéticos en acción.” Source: RevenueBase Database · checked Sep 28, 2026
23	Ineria Management	Partial evidence	Madrid, SpainHQ checked Sep 28, 2026	11-50	48 contacts →
	Partial evidence “At Ineria Management, we help Real Estate and Infrastructure companies integrate sustainability and decarbonization into their projects, creating value through ESG.” Source: RevenueBase Database · checked Sep 28, 2026
24	Transcendent	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	11-50	46 contacts →
	Indirect evidence “Transcendent es una consultora estratégica de Impacto y sostenibilidad.” Source: RevenueBase Database · checked Sep 28, 2026
25	G-Advisory	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	11-50	45 contacts →
	Indirect evidence “G-advisory - Consultoría estratégica en Energía y ESG Filial de Garrigues que ofrece asesoramiento técnico, económico y estratégico en todo tipo de energías y servicios de ESG.” Source: RevenueBase Database · checked Sep 28, 2026

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: decarbonization consultancies. 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 decarbonization consultancies.
Partial evidence: Its own public description names part of decarbonization consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name decarbonization consultancies. 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 1,288 decarbonization consultancies based in Spain

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Decarbonization consultancies based in Spain at a glance

As of Sep 28, 2026

10.0%Verified-email coverage

10.9Average contacts per company

1-10Median size (employees)

22.4%Largest-city concentration · Madrid

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

869

11-50

326

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 1,288 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 decarbonization consultancies, 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 Spain whose own description of what they do matches “decarbonization consultancies”. 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 decarbonization consultancies), 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 decarbonization consultancies, and records with no verified work email. Companies headquartered outside Spain 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, 1,400 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 28, 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.

Decarbonization consultancies by metro

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 decarbonization consultancies, 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 decarbonization consultancies are there based in Spain?

RevenueBase identified 1,288 decarbonization consultancies headquartered in 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?

Inerco, headquartered in Sevilla, tops this list with the largest team on record.

Which city has the most decarbonization consultancies?

Madrid leads with 289 headquartered companies, followed by Barcelona (142) and Valencia (50).

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 1,400 verified decision-maker contacts tracked across these 1,288 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 28, 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.