Company lists · Data refreshed September 2026
Top 25 Environmental nonprofits based in Spain
RevenueBase identified 485 environmental nonprofits headquartered in Spain as of September 2026 and tracks 3,109 professional contacts across them, including 251 with verified work emails. Madrid is the largest hub.
This list covers environmental nonprofits 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 19, 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 environmental nonprofits based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 109 contacts → | ||||
Indirect evidence “SEO/BirdLife (Sociedad Española de Ornitología) está orientada a cumplir la función social que nos mueve desde 1954: estudiar y conservar las aves y la naturaleza y divulgar sus…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 101 contacts → | ||||
Partial evidence “Ihobe is an Environmental Management Public Agency of the Basque Government whose aim is to support the Department for the Environment, Spatial Planning, Agriculture and Fisheries…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 73 contacts → | ||||
Indirect evidence “Greenpeace es una organización ecologista y pacifista, económica y políticamente independiente, no acepta donaciones ni presiones de gobiernos o empresas” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 50 contacts → | ||||
Indirect evidence “Especialistas en cuidar lo que nos rodea, con la sostenibilidad y respeto al medioambiente como gran valor.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 48 contacts → | ||||
Indirect evidence “Somos una fundación privada sin ánimo de lucro dedicada a la protección de la naturaleza.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 47 contacts → | ||||
Indirect evidence “Ambientum.com es el portal de Internet líder en el sector del medio ambiente y la industria, nacido de la vocación de ser el punto de encuentro entre los profesionales del mercado.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 43 contacts → | ||||
Indirect evidence “GREFA (Grupo de Rehabilitación de la Fauna Autóctona y su Hábitat) es una organización no gubernamental sin ánimo de lucro, que nace en 1981 como asociación para el estudio y…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 40 contacts → | ||||
Indirect evidence “SYLVESTRIS es una empresa de ingeniería natural que ofrece soluciones innovadoras integrando personas y naturaleza.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 33 contacts → | ||||
Partial 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 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 33 contacts → | ||||
Indirect evidence “Somos una empresa que en 2025 cumplimos veinticinco años de trayectoria profesional al servicio del medio ambiente.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 29 contacts → | ||||
Indirect evidence “EXTREPRONATUR SL es una consultora medioambiental y servicios AVENIDA JUAN PEREDA PILA, 1, BADAJOZ, Badajoz, Spain.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 26 contacts → | ||||
Partial evidence “Ecoherencia is a nonprofit worker cooperative whose mission is to be a source of inspiration for action in response to the climate emergency.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 25 contacts → | ||||
Indirect evidence “La Fundación Privada Empresa & Clima (FEC), es un referente empresarial para la mitigación y adaptación al cambio climático, que comparte el interés en la protección del…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 23 contacts → | ||||
Indirect evidence “We are a non-profit organization, founded by Theresa Zabell, which aims to educate and raise awareness, especially children, in the care, respect and conservation of our planet…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 21 contacts → | ||||
Partial evidence “Specialists in environmental & sustainability communications.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 21 contacts → | ||||
Indirect evidence “En un món en constant evolució, creiem fermament en la importància de prendre mesures concretes cap a un futur més sostenible.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 20 contacts → | ||||
Indirect evidence “La Fundación Entretantos es una entidad sin ánimo de lucro creada por un amplio abanico de profesionales con el fin de: Promover la participación como herramienta en la definición…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 19 contacts → | ||||
Indirect evidence “Desarrollo integral de proyectos ambientales.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence “Somos una organización no gubernamental (ONG) sin fines de lucro, creada en Venezuela el 13 de agosto de con la misión de contribuir a la formación en valores, conocimientos y…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 15 contacts → | ||||
Indirect evidence “La Asociación de Naturalistas del Sureste es una organización social sin fines lucrativos, cuyos objetivos son la divulgación, estudio y defensa de la Naturaleza y el Medio…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 15 contacts → | ||||
Indirect evidence “Portem a terme projectes principalment vinculats al desenvolupament i implementació de polítiques públiques, centrant-nos en l’àmbit de l’elaboració, l’anàlisi i la gestió de les…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 15 contacts → | ||||
Indirect evidence “ECOACSA nace para llenar el vacío existente en la aplicación de los Mecanismos de Mercado (obligatorios, negociables y voluntarios) en España.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 15 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 contacts → | ||||
Indirect evidence “Bridging the Gap to Finance Climate Action: We are a diverse group of doers united for a common goal: turning bold climate ideas into fundable and implementable projects that have…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 14 contacts → | ||||
Indirect evidence “La Fundación Renovables es un movimiento ciudadano sin ánimo de lucro que promueve el cambio hacia un nuevo modelo energético basado en el ahorro, la eficiencia y las renovables…” Source: RevenueBase Database · checked Sep 19, 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: environmental nonprofits. 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 environmental nonprofits.
- Partial evidence
- Its own public description names part of environmental nonprofits, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name environmental nonprofits. 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 485 environmental nonprofits based in Spain
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Environmental nonprofits based in Spain at a glance
As of Sep 19, 2026Companies by employee count
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 485 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 environmental nonprofits, 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 “environmental nonprofits”. 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 environmental nonprofits), 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 environmental nonprofits, 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, 251 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 19, 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.
Environmental nonprofits by metro
- Environmental nonprofits in Madrid86
- Environmental nonprofits in Barcelona53
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 environmental nonprofits, 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 environmental nonprofits are there based in Spain?
RevenueBase identified 485 environmental nonprofits 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?
SEO Birdlife, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most environmental nonprofits?
Madrid leads with 86 headquartered companies, followed by Barcelona (53) and Malaga (19).
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 251 verified decision-maker contacts tracked across these 485 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 19, 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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