Company lists · Data refreshed September 2026

Top 24 Sustainability consulting companies based in Spain

Name: Sustainability consulting companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 919 companies tracked

RevenueBase identified 919 sustainability consulting companies headquartered in Spain as of September 2026 and tracks 9,664 professional contacts across them, including 954 with verified work emails. Madrid is the largest hub.

This list covers sustainability consulting companies 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 22, 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 22, 2026 86% judged on-target in blind review

919Companies

9,664Contacts tracked

954Verified emails

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The 24 largest sustainability consulting companies based in Spain

Ranked by team size

Top 24 of 919 sustainability consulting companies based in Spain, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability consulting companies: 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 22, 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 22, 2026
2	AESA	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 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 22, 2026
3	Anthesis ESP	Indirect evidence	Manlleu, SpainHQ checked Sep 22, 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 22, 2026
4	Sm, Sistemas Medioambientales, SL	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	201-500	174 contacts →
	Indirect evidence “Impulsamos la sostenibilidad empresarial con soluciones técnicas y reales.” Source: RevenueBase Database · checked Sep 22, 2026
5	MAI Group	Indirect evidence	Madrid, SpainHQ checked Sep 22, 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 22, 2026
6	INOVA	Indirect evidence	Vigo, SpainHQ checked Sep 22, 2026	11-50	131 contacts →
	Indirect evidence “Somos una consultora especializada en ofrecer soluciones a medida a empresas y organizaciones basadas en la ingeniería y las tecnologías más innovadoras.” Source: RevenueBase Database · checked Sep 22, 2026
7	SGA	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	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 22, 2026
8	Grupo Trebol Energia	Indirect evidence	Sant Joan Despi, SpainHQ checked Sep 22, 2026	51-200	84 contacts →
	Indirect evidence “We are one of the leading energy business consultancies in Spain.” Source: RevenueBase Database · checked Sep 22, 2026
9	Emgrisa	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	84 contacts →
	Indirect evidence “Emgrisa es una empresa pionera en servicios y soluciones medioambientales y en economía circular.” Source: RevenueBase Database · checked Sep 22, 2026
10	Sygris	Strong evidence	San Sebastián De Los Reyes, SpainHQ checked Sep 22, 2026	51-200	77 contacts →
	Strong evidence “Hi, we’re Sygris, Spain’s leader in sustainability consulting and ESG software.” Source: RevenueBase Database · checked Sep 22, 2026
11	Taxus Medio Ambiente	Indirect evidence	Oviedo, SpainHQ checked Sep 22, 2026	51-200	71 contacts →
	Indirect evidence “TAXUS MEDIO AMBIENTE es una consultoría ambiental.” Source: RevenueBase Database · checked Sep 22, 2026
12	CIMAS	Indirect evidence	Bilbao, SpainHQ checked Sep 22, 2026	n/a	69 contacts →
	Indirect evidence “CIMAS Innovación y Medio Ambiente es una compañía de servicios avanzados especializada en Desarrollo Sostenible y Medio Ambiente.” Source: RevenueBase Database · checked Sep 22, 2026
13	Azigrene Energy Consulting	Indirect evidence	Valencia/valència, SpainHQ checked Sep 22, 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 22, 2026
14	Ineria Management	Partial evidence	Madrid, SpainHQ checked Sep 22, 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 22, 2026
15	Transcendent	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	46 contacts →
	Indirect evidence “Transcendent es una consultora estratégica de Impacto y sostenibilidad.” Source: RevenueBase Database · checked Sep 22, 2026
16	Signature Management Consultants	Partial evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	45 contacts →
	Partial evidence “Signature is a cross industry management and strategy consulting boutique.” Source: RevenueBase Database · checked Sep 22, 2026
17	Intacta Gestión Ambiental	Indirect evidence	As Pontes De García Rodríguez, SpainHQ checked Sep 22, 2026	11-50	45 contacts →
	Indirect evidence “Intacta surge como una sinergia que une la participación activa y concertada para alcanzar una eficacia total y garantizar cualquier servicio medioambiental, pero con ella nace…” Source: RevenueBase Database · checked Sep 22, 2026
18	G-Advisory	Indirect evidence	Madrid, SpainHQ checked Sep 22, 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 22, 2026
19	Serviguide Consultancy	Indirect evidence	A Coruña, SpainHQ checked Sep 22, 2026	51-200	42 contacts →
	Indirect evidence “At Serviguide Consultoría, we help companies understand the context in which they operate and visualize the trends that guide their decision-making processes.” Source: RevenueBase Database · checked Sep 22, 2026
20	Icsem Instituto Para EL Crecimiento Sostenible DE LA Empresa	Indirect evidence	Vigo, SpainHQ checked Sep 22, 2026	11-50	35 contacts →
	Indirect evidence “En ICSEM entendemos el crecimiento sostenible como indicador de generación de riqueza, que compromete al desarrollo, conciliando a la sociedad, a la economía y al medio ambiente.” Source: RevenueBase Database · checked Sep 22, 2026
21	Cias COM 2001	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	34 contacts →
	Indirect evidence “CIAS COM consultoría especializada en la contratación, control de servicios generales y gestión de la eficiencia energética en Administraciones Públicas y organizaciones privadas” Source: RevenueBase Database · checked Sep 22, 2026
22	Erf, Energia & Sostenibilitat - Wattega	Strong evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	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 22, 2026
23	Grupo Emececuadrado	Indirect evidence	Badajoz, SpainHQ checked Sep 22, 2026	11-50	33 contacts →
	Indirect evidence “Emececuadrado es una de las principales compañías del sector energético, especializada en el asesoramiento y la optimización de recursos energéticos para empresas, organismos…” Source: RevenueBase Database · checked Sep 22, 2026
24	Vector Horizonte	Indirect evidence	Sevilla, SpainHQ checked Sep 22, 2026	11-50	32 contacts →
	Indirect evidence “En Vector Horizonte somos una consultora de financiación pública y sostenibilidad que convierte ideas audaces en crecimiento tangible.” Source: RevenueBase Database · checked Sep 22, 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: sustainability consulting companies. 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 consulting companies.
Partial evidence: Its own public description names part of sustainability consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability consulting companies. 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 24 of 919 sustainability consulting companies based in Spain

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Sustainability consulting companies based in Spain at a glance

As of Sep 22, 2026

9.9%Verified-email coverage

10.5Average contacts per company

1-10Median size (employees)

19.5%Largest-city concentration · Madrid

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

682

11-50

187

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 919 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 consulting companies, 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 “sustainability consulting companies”. 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 consulting companies), 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 consulting companies, 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, 954 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 22, 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 consulting companies by metro

Sustainability consulting companies in Madrid179
Sustainability consulting companies in Barcelona127
Sustainability consulting companies in Valencia37
Sustainability consulting companies in Sevilla25

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 consulting companies, 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 consulting companies are there based in Spain?

RevenueBase identified 919 sustainability consulting companies 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 sustainability consulting companies?

Madrid leads with 179 headquartered companies, followed by Barcelona (127) and Valencia (37).

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 954 verified decision-maker contacts tracked across these 919 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 22, 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.