Company lists · Data refreshed September 2026

Top 25 Sustainable development firms based in Madrid, Spain

Name: Sustainable development firms based in Madrid, Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 208 companies tracked

RevenueBase identified 208 sustainable development firms headquartered in Madrid, Spain as of September 2026 and tracks 32,328 professional contacts across them, including 4,273 with verified work emails. Madrid is the largest hub.

This list covers sustainable development firms headquartered in Madrid, 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

208Companies

32,328Contacts tracked

4,273Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest sustainable development firms based in Madrid, Spain

Ranked by team size

Top 25 of 208 sustainable development firms based in Madrid, Spain, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable development firms: 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	Acciona	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	10001+	27,028 contacts →
	Indirect evidence “ACCIONA champions a different way of doing business: Business as Unusual, delivering benefits far beyond the corporate realm.” Source: RevenueBase Database · checked Sep 22, 2026
2	Incosa	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	201-500	439 contacts →
	Indirect evidence “We’re an Engineering and Consulting company with more than 35 years of experience and a diverse range of services in the Building, Infrastructure, Energy and Industry, Environment…” Source: RevenueBase Database · checked Sep 22, 2026
3	Enertis Applus	Indirect evidence	Madrid, SpainHQ checked Sep 22, 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 22, 2026
4	Sólida	Indirect evidence	Madrid, SpainHQ checked Sep 22, 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 22, 2026
5	Eductrade	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	247 contacts →
	Indirect evidence “Eductrade es una compañía especializada en el desarrollo integral de proyectos en las áreas de salud, educación, agua y energía, consultoría y otros sectores sociales.” Source: RevenueBase Database · checked Sep 22, 2026
6	Proyeco, S.A	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	201-500	179 contacts →
	Indirect evidence “Fundada en 1988, Proyectos, Ejecución y Control de Obras S.A.(PROYECO) ofrece desde hace más de 35 años servicios de Consultoría, Asesoramiento y Project Management brindando…” Source: RevenueBase Database · checked Sep 22, 2026
7	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
8	Valladares Ingeniería S.L	Partial evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	131 contacts →
	Partial 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
9	Heymo Ingeniería, S.A.U	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	201-500	109 contacts →
	Indirect evidence “HEYMO es una empresa de servicios profesionales de ingeniería y consultoría que cuenta con 60 años de experiencia nacional e internacional.” Source: RevenueBase Database · checked Sep 22, 2026
10	Sferaone	Indirect evidence	Madrid, SpainHQ checked Sep 22, 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 22, 2026
11	Bluetree Group	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	60 contacts →
	Indirect evidence “Helping investors and energy companies maximise renewable asset performance while keeping risk under control.” Source: RevenueBase Database · checked Sep 22, 2026
12	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
13	Agresta S. Coop	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	45 contacts →
	Indirect evidence “AGRESTA Sociedad Cooperativa es una consultora ambiental de ámbito nacional especializada en el sector forestal, ingeniería en el medio natural y estudios de impacto ambiental.” Source: RevenueBase Database · checked Sep 22, 2026
14	Retailgas	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	44 contacts →
	Indirect evidence “El Grupo Retailgas está constituido por dos sociedades, Retailgas S.A.” Source: RevenueBase Database · checked Sep 22, 2026
15	Altácia	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	29 contacts →
	Indirect evidence “Somos un socio de confianza estratégico para nuestros clientes.” Source: RevenueBase Database · checked Sep 22, 2026
16	Audema S.A	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	29 contacts →
	Indirect evidence “AUDITORES DE ENERGÍA Y MEDIO AMBIENTE, S.A tiene por objeto la realización de actividades de consultoría y asesoramiento relacionadas con la transferencia de tecnología, la…” Source: RevenueBase Database · checked Sep 22, 2026
17	EHS Techniques	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	28 contacts →
	Indirect evidence “EHS TECHNIQUES is a Social, Environmental and Health and Safety consultancy with a team of professionals and associates with a strong experience in providing best available…” Source: RevenueBase Database · checked Sep 22, 2026
18	Zumain Ingenieros	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	27 contacts →
	Indirect evidence “Zumain Ingenieros, inicia su andadura en el año 2002, con la intención de desarrollar su trabajo en el sector de los estudios y proyectos ambientales, con el objetivo de dar un…” Source: RevenueBase Database · checked Sep 22, 2026
19	Intelec SL	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	23 contacts →
	Indirect evidence “Creamos y gestionamos soluciones y servicios de instalaciones que contribuyen de manera eficiente y sostenible al bienestar de la sociedad, fomentando el desarrollo económico y…” Source: RevenueBase Database · checked Sep 22, 2026
20	Lambert Bioenergy	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “Consultoría Project Manager.” Source: RevenueBase Database · checked Sep 22, 2026
21	Gpyo Innova S.L	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “We are specialized in Consultancy professional services, RDI, Energy Efficiency, Industrial and Civil Engineering, Environment and Training, working as full technical support for…” Source: RevenueBase Database · checked Sep 22, 2026
22	HAZ Energía	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “Haz Energía es una empresa dedicada a los proyectos de ingeniería y consultoría especializada en el sector fotovoltaico.” Source: RevenueBase Database · checked Sep 22, 2026
23	The Overview Effect	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “We help companies identify, launch, and scale positive impact products and services that allow them to grow, differentiate, diversify, or mitigate risk.” Source: RevenueBase Database · checked Sep 22, 2026
24	FOCE	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	201-500	18 contacts →
	Indirect evidence “FOCE is a project developer and facility services provider with a global footprint in #USA #LatAm #MiddleEast & #Africa We provide engineering, project management, structured…” Source: RevenueBase Database · checked Sep 22, 2026
25	Orfisa IKC	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “INDEPENDENT CONSULTING ENGINEERING - CONSULTING & ADVICE ON INTERNATIONAL TENDERS - PROJECT & CONSTRUCTION MANAGEMENT ORFISA is a independent consulting engineering.” 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: sustainable development 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 sustainable development firms.
Partial evidence: Its own public description names part of sustainable development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable development 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 208 sustainable development firms based in Madrid, Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 4,273 reachable decision-makers.

Free signup · no credit card

View the full list →

Sustainable development firms based in Madrid, Spain at a glance

As of Sep 22, 2026

13.2%Verified-email coverage

155.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Madrid

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

129

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole Spain list rather than for Madrid, so it is reported there. Company counts and contact totals on this page are exact for Madrid, over 208 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 sustainable development 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 Madrid, Spain whose own description of what they do matches “sustainable development 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 sustainable development 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 sustainable development firms, and records with no verified work email. Companies headquartered outside Madrid 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, 4,273 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.

Sustainable development firms by metro in Spain

Sustainable development firms in Madrid208
Sustainable development firms in Barcelona106
Sustainable development firms in Valencia52
Sustainable development firms in Sevilla47

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 sustainable development 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 sustainable development firms are there based in Madrid, Spain?

RevenueBase identified 208 sustainable development firms headquartered in Madrid, 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?

Acciona, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most sustainable development firms?

Madrid leads with 208 headquartered companies, followed by Barcelona (106) and Valencia (52).

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 4,273 verified decision-maker contacts tracked across these 208 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.

Ready to reach these companies? Verified emails and direct dials for all 208 sustainable development firms based in Madrid, Spain. Start with a free account, no credit card.

Download this list →

Related lists

Sustainable development firms by geography

Browse the directory

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.