Company lists · Data refreshed September 2026

Top 25 Residential energy efficiency companies based in Spain

Name: Residential energy efficiency companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 694 companies tracked

RevenueBase identified 694 company matches for residential energy efficiency companies associated with Spain as of September 2026 and tracks 3,591 professional contacts across them, including 232 with verified work emails. Madrid is the largest hub.

This list covers company matches for residential energy efficiency companies associated with Spain, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

694Companies

3,591Contacts tracked

232Verified emails

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The 25 largest residential energy efficiency companies based in Spain

Ranked by team size

Top 25 of 694 company matches for residential energy efficiency companies based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	NESS	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	11-50	81 contacts →
	Exact match “NESS, empresa de servicios energéticos especializada en la gestión y ahorro energético.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Engel Energy	Exact match	Barberá, SpainHQ recorded Sep 17, 2026	201-500	76 contacts →
	Exact match “Hola, somos Engel Energy y hacemos the good-good energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Vivendio Grupo Aconser	Exact match	Granada, SpainHQ recorded Sep 17, 2026	51-200	73 contacts →
	Exact match “En Vivendio, empresa perteneciente a Grupo Aconser, nos dedicamos a la eficiencia y rehabilitación energética.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Boquet	Exact match	Mataró, SpainHQ recorded Sep 17, 2026	51-200	48 contacts →
	Exact match “4th generation family business founded in 1904.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Cambioenergetico	Exact match	Coria, SpainHQ recorded Sep 17, 2026	51-200	42 contacts →
	Exact match “Especialistas en ahorro energético y eficiencia energética.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Iner Energía	Exact match	Albacete, SpainHQ recorded Sep 17, 2026	51-200	41 contacts →
	Exact match “Iner, la energía con personalidad propia.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	1komma5 ES	Exact match	Cerdanyola Del Vallès, SpainHQ recorded Sep 17, 2026	51-200	39 contacts →
	Exact match “Nuestra visión es hacer que todos podamos vivir de las energías renovables para siempre y gratis.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Ge&pe	Exact match	Seville, SpainHQ recorded Sep 17, 2026	11-50	30 contacts →
	Exact match “GE & PE was created in 1983 with the purpose of covering the needs and increasingly complex management and efficiency tasks related to the supply and consumption of energy by…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Inergy	Exact match	Barcelona, SpainHQ recorded Sep 17, 2026	11-50	29 contacts →
	Exact match “Inergy tiene como misión contribuir al ahorro energético de sus clientes, reduciendo su factura energética, y favoreciendo al mismo tiempo la mitigación del cambio climático.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	ZULUX	Exact match	Santa Pola, SpainHQ recorded Sep 17, 2026	11-50	27 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Letter Ingenieros	Exact match	Granada, SpainHQ recorded Sep 17, 2026	11-50	27 contacts →
	Exact match “We offer companies efficient solutions with the best consulting and engineering services in: Energy Management Energy certification and qualification of buildings Energy…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Alisea Esco, S.A	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	11-50	22 contacts →
	Exact match “ALISEA es una de las Empresas de Servicios Energéticos pionera en España especializada en promover proyectos de eficiencia energética, por medio del diseño y soluciones para el…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Mariposa Energía	Exact match	Marbella, SpainHQ recorded Sep 17, 2026	11-50	21 contacts →
	Exact match “Green energy company specialising in solar panels and energy switch.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Cavo Energías	Exact match	Valencia, SpainHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match “Empresa de servicios energéticos, especializada en diversas disciplinas en materia de ahorro energético y con una amplia formación derivada de sus más de 15 años de experiencia en…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	A3e	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	1-10	18 contacts →
	Exact match “A3E- Asociación Nacional de Empresas de Eficiencia Energética es una organización sin ánimo de lucro de ámbito nacional que agrupa y representa a más de 160 empresas, que…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	RELSA	Exact match	Sabadell, SpainHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Más de 50 años aportando valor a nuestros clientes.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Wikitel Asesores	Exact match	Seville, SpainHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Servicios de consultoría energética e instalación de Placas Solares para particulares y empresas.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Luzía Energía	Exact match	Mairena Del Aljarafe, SpainHQ recorded Sep 17, 2026	51-200	16 contacts →
	Exact match “Luzía Energía is a company dedicated to saving and energy efficiency.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Ahorrenergia	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	51-200	16 contacts →
	Exact match “Ahorrenergía es un grupo formado por profesionales del sector energético, tecnológico y financiero, comprometido con la Eficiencia Energética, Medio Ambiente y Ahorro Sostenible…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	KW Solutions	Exact match	Málaga, SpainHQ recorded Sep 17, 2026	11-50	15 contacts →
	Exact match “Desarrollamos soluciones de eficiencia energética.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Gese Integral DE Servicios Energéticos	Exact match	Leioa, SpainHQ recorded Sep 17, 2026	11-50	15 contacts →
	Exact match “Gese promotes Energy Efficiency investments at Manufacturing and Services companies, integrating the most adequate technology and the Financial Resources that transform Energy…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Aliara Energía	Exact match	Pozuelo De Alarcón, SpainHQ recorded Sep 17, 2026	11-50	15 contacts →
	Exact match “Aliara personaliza las soluciones de eficiencia energética relacionadas con el gas natural: desde la auditoria energética, la financiación de proyectos o el mantenimiento con…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Biosphere Flux	Exact match	Barcelona, SpainHQ recorded Sep 17, 2026	11-50	15 contacts →
	Exact match “Biosphere Flux es una empresa de la nueva economía, formada por jóvenes emprendedores y que está resuelta en el fomento de las tecnologías en EFICIENCIA ENERGÉTICA y en la…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Gen0	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	11-50	14 contacts →
	Exact match “We work with our clients to help them reduce their energy use and cost and related environmental impact including green house gas emissions through energy management systems based…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Efiwatt	Exact match	Palma De Mallorca, SpainHQ recorded Sep 17, 2026	11-50	13 contacts →
	Exact match “Impulsamos la energía del futuro en las Islas Baleares.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “residential energy efficiency companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 694 residential energy efficiency companies based in Spain

See the full list, filter by size, metro and specialty, and access 232 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Residential energy efficiency companies based in Spain at a glance

As of Sep 17, 2026

6.5%Verified-email coverage

5.2Average contacts per company

1-10Median size (employees)

16.7%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

421

11-50

217

51-200

201-500

501-1,000

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 694 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Spain whose business descriptions match “residential energy efficiency companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 232 professional contacts with verified work emails across the full matched dataset. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Residential energy efficiency companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “residential energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many residential energy efficiency companies are there based in Spain?

RevenueBase identified 694 company matches for residential energy efficiency companies associated with Spain as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

NESS tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most residential energy efficiency companies?

Madrid leads with 116 company records, followed by Barcelona (44) and Valencia (28).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 232 professional contacts with verified work emails tracked across these 694 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 SmartSearch, 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.