Company lists · Data verified August 2026

Top 25 Carbon accounting firms based in Spain

Name: Carbon accounting firms based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 220 companies tracked

There are 220 carbon accounting firms headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 2,200 professional contacts across them, including 348 with verified work emails and 24 with mobile numbers. Madrid is the largest hub.

This list covers carbon accounting firms headquartered in Spain, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

220Companies

2,200Contacts tracked

348Verified emails

24Mobile numbers

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The 25 largest carbon accounting firms based in Spain

Ranked by team size

Top 25 of 220 carbon accounting firms based in Spain, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Anthesis ESP	Manlleu	201-500	333	75
2	Valora Consultores	A Coruna	51-200	238	41
3	Sm, Sistemas Medioambientales, SL	Barcelona	201-500	174	2
4	Sygris	San Sebastian De Los Reyes	51-200	77	15
5	Taxus Medio Ambiente	Oviedo	51-200	69	1
6	CIMAS	Bilbao	n/a	69	1
7	Ineria Management	Madrid	11-50	48	8
8	Aether	Madrid	11-50	45	35
9	Transcendent	Madrid	11-50	45	6
10	Ibersyd Iber Sostenibilidad Y Desarrollo	Zaragoza	11-50	30	1
11	Deplan, S.L	Madrid	11-50	29	2
12	Extrepronatur SL	Badajoz	11-50	29	1
13	EHS Techniques	Madrid	11-50	28	9
14	Energy Tools	Terrassa	11-50	28	8
15	Energía Local	Barcelona	11-50	27	10
16	Ecoterrae	Sevilla	11-50	26	1
17	Letter Ingenieros	Granada	11-50	26	1
18	Icatalist S.L	Las Rozas De Madrid	11-50	24	5
19	Síntesis Y Acción	La Canada Paterna	11-50	21	7
20	Omawa Huella Ecológica	Palencia	11-50	20	9
21	Encore Efficiency SE	Madrid	11-50	16	10
22	Gen0	Madrid	11-50	15	3
23	Ensphere Group LTD	Zaragoza	11-50	14	12
24	Grunver Sostenibilidad	Las Arenas	11-50	14	1
25	IK Ingenieria Ingurumenaren Kideak Ingenieria	Basauri	11-50	12	3

Showing 25 of 220 carbon accounting firms based in Spain

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Carbon accounting firms based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 60 HQs

24Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

164

11-50

51-200

201-500

501-1,000

Carbon accounting firms by metro

Metro	Companies
Carbon accounting firms in Madrid	60
Carbon accounting firms in Barcelona	30
Carbon accounting firms in Zaragoza	7
Carbon accounting firms in Valencia	6
Carbon accounting firms in Valladolid	5
Carbon accounting firms in Sevilla	4
Carbon accounting firms in Oviedo	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “carbon accounting firms”, with match quality audited by blind human judging, and headquartered in Spain.
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: Contact records re-verify on a rolling cadence; 3 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many carbon accounting firms are there based in Spain?

There are 220 carbon accounting firms headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

Anthesis ESP, headquartered in Manlleu, tops this list with the largest team on record.

Which city has the most carbon accounting firms?

Madrid leads with 60 headquartered companies, followed by Barcelona (30) and Zaragoza (7).

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 348 verified decision-maker contacts tracked across these 220 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.