Company lists · Data refreshed September 2026

Top 25 Sustainability consultants based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 1,235 companies tracked

RevenueBase identified 1,235 sustainability consultants headquartered in Spain as of September 2026 and tracks 11,514 professional contacts across them, including 1,268 with verified work emails. Madrid is the largest hub.

This list covers sustainability consultants 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

1,235Companies

11,514Contacts tracked

1,268Verified emails

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The 25 largest sustainability consultants based in Spain

Ranked by team size

Top 25 of 1,235 sustainability consultants 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 consultants: 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	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
3	Quadrante Meta Engineering	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	501-1,000	237 contacts →
	Indirect evidence “Empresa líder ibérica de servicios profesionales en ingeniería, arquitectura, medio ambiente y sostenibilidad.” Source: RevenueBase Database · checked Sep 22, 2026
4	Ecointegral Ingeniería, SL	Indirect evidence	Córdoba, SpainHQ checked Sep 22, 2026	201-500	234 contacts →
	Indirect evidence “ECOINTEGRAL INGENIERÍA is an independent company of advanced engineering and consulting firm that operates in 3 areas of expertise: Energy, Telecommunications and Environment.” Source: RevenueBase Database · checked Sep 22, 2026
5	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
6	MAI Group	Partial evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	152 contacts →
	Partial 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
7	Valladares Ingeniería S.L	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	131 contacts →
	Indirect evidence “Within VALLADARES_ing, engineering challenges are part of our everyday" Global engineering and sustainable buildings Applying our vast experience we strive to provide our clients…” Source: RevenueBase Database · checked Sep 22, 2026
8	Grupo Argenia	Indirect evidence	Seville, SpainHQ checked Sep 22, 2026	51-200	100 contacts →
	Indirect evidence “Somos una consultora especializada en edificación, nuestra experiencia se ha desarrollado principalmente en los sectores industrial, retail, y hotelero.” Source: RevenueBase Database · checked Sep 22, 2026
9	Grupo Trebol Energia	Partial evidence	Sant Joan Despi, SpainHQ checked Sep 22, 2026	51-200	84 contacts →
	Partial evidence “We are one of the leading energy business consultancies in Spain.” Source: RevenueBase Database · checked Sep 22, 2026
10	Sygris	Partial evidence	San Sebastián De Los Reyes, SpainHQ checked Sep 22, 2026	51-200	77 contacts →
	Partial 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	Tauw Iberia	Partial evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	65 contacts →
	Partial evidence “Tauw Iberia is an independent environmental consultancy and engineering company established in 1989.” Source: RevenueBase Database · checked Sep 22, 2026
14	Tandem Social	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	64 contacts →
	Indirect evidence “La vocació esdevé implicació, i la implicació esdevé en resultats.” Source: RevenueBase Database · checked Sep 22, 2026
15	Tech Friendly	Indirect evidence	Bilbao, SpainHQ checked Sep 22, 2026	11-50	60 contacts →
	Indirect evidence “Somos una ingeniería especializada en innovación urbana sostenible y ciudades inteligentes.” Source: RevenueBase Database · checked Sep 22, 2026
16	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
17	Red2red	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	51 contacts →
	Indirect evidence “Red2Red was founded in with the aim of becoming the Spanish company specialising in strategy, public policies and public management.” Source: RevenueBase Database · checked Sep 22, 2026
18	Ingennus	Indirect evidence	Zaragoza, SpainHQ checked Sep 22, 2026	51-200	49 contacts →
	Indirect evidence “Firma internacional de arquitectura sostenible e innovadora.” Source: RevenueBase Database · checked Sep 22, 2026
19	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
20	Konery	Indirect evidence	Murcia, SpainHQ checked Sep 22, 2026	51-200	47 contacts →
	Indirect evidence “Somos una ingeniería cuya misión es la mejora de la eficiencia energética e implantación de energías renovables como vía para cuidar el medio ambiente y mejorar la competitividad…” Source: RevenueBase Database · checked Sep 22, 2026
21	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
22	Signature Management Consultants	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	45 contacts →
	Indirect evidence “Signature is a cross industry management and strategy consulting boutique.” Source: RevenueBase Database · checked Sep 22, 2026
23	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
24	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
25	AIA Activitats Instal Lacions Arquitectòniques	Partial evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	40 contacts →
	Partial evidence “AIA are a multidisciplinary team, with 25 years of experience and over 300 built projects; composed of architects, engineers and consultants experts on carrying out architectural…” 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 consultants. 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 consultants.
Partial evidence: Its own public description names part of sustainability consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability consultants. 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 1,235 sustainability consultants based in Spain

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Sustainability consultants based in Spain at a glance

As of Sep 22, 2026

11.0%Verified-email coverage

9.3Average contacts per company

1-10Median size (employees)

20.6%Largest-city concentration · Madrid

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

924

11-50

252

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 1,235 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 consultants, 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 consultants”. 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 consultants), 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 consultants, 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, 1,268 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 consultants by metro

Sustainability consultants in Madrid254
Sustainability consultants in Barcelona168
Sustainability consultants in Valencia55
Sustainability consultants in Sevilla34
Sustainability consultants in Malaga27

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 consultants, 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 consultants are there based in Spain?

RevenueBase identified 1,235 sustainability consultants 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 consultants?

Madrid leads with 254 headquartered companies, followed by Barcelona (168) and Valencia (55).

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 1,268 verified decision-maker contacts tracked across these 1,235 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.