Company lists · Data refreshed September 2026

Top 25 Iso audit consulting companies based in Spain

Name: Iso audit consulting companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 661 companies tracked

RevenueBase identified 661 iso audit consulting companies headquartered in Spain as of September 2026 and tracks 42,597 professional contacts across them, including 2,767 with verified work emails. Madrid is the largest hub.

This list covers iso audit consulting companies 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 28, 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 28, 2026 86% judged on-target in blind review

661Companies

42,597Contacts tracked

2,767Verified emails

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The 25 largest iso audit consulting companies based in Spain

Ranked by team size

Top 25 of 661 iso audit consulting companies based in Spain, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to iso audit consulting companies: 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	Autonomo	Indirect evidence	Córdoba, SpainHQ checked Sep 28, 2026	n/a	23,018 contacts →
	Indirect evidence “Calidad y Gestión es una empresa consultora de ámbito internacional especializada en servicios de asesoría en las siguientes áreas: Calidad Medio Ambiente Responsabilidad social…” Source: RevenueBase Database · checked Sep 28, 2026
2	Applus	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	10001+	6,478 contacts →
	Indirect evidence “Applus+ is a worldwide leader in the testing, inspection, and certification sector.” Source: RevenueBase Database · checked Sep 28, 2026
3	OCA Global	Partial evidence	Sant Cugat Del Valles, SpainHQ checked Sep 28, 2026	1,001-5,000	2,690 contacts →
	Partial evidence “OCA Global is a private business group –with headquarters in Spain–, dedicated to inspection, quality control, certification, testing, consulting, and training activities.” Source: RevenueBase Database · checked Sep 28, 2026
4	AENOR	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	501-1,000	961 contacts →
	Indirect evidence “AENOR is a global company, that identifies and helps organizations to overcome relevant competitiveness gaps.” Source: RevenueBase Database · checked Sep 28, 2026
5	MTP Métodos Y Tecnología	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	501-1,000	686 contacts →
	Indirect evidence “Consultora especializada en servicios de Aseguramiento de la Calidad del Software dirigidos a controlar y mejorar los costes, plazos y calidad del ciclo de vida de los productos…” Source: RevenueBase Database · checked Sep 28, 2026
6	Boslan Ingeniería Y Consultoría	Indirect evidence	Bilbao, SpainHQ checked Sep 28, 2026	501-1,000	526 contacts →
	Indirect evidence “Boslan, now part of Accenture, is a consolidated and solvent company supported by its numerous references developed for an important portfolio of clients.” Source: RevenueBase Database · checked Sep 28, 2026
7	EQA España	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	201-500	298 contacts →
	Indirect evidence “EQA es una entidad internacional de certificación, verificación e inspección, con más de 25 años de trayectoria.” Source: RevenueBase Database · checked Sep 28, 2026
8	Seidor Gesein	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	201-500	162 contacts →
	Indirect evidence “Gesein nace en 1993 en Madrid.” Source: RevenueBase Database · checked Sep 28, 2026
9	Globalsuite Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	120 contacts →
	Indirect evidence “At GlobalSuite Solutions we are dedicated to providing and implementing solutions in matters of Risks, Security, Continuity, Legal Compliance, Auditing, Privacy among others.” Source: RevenueBase Database · checked Sep 28, 2026
10	Preverisk Group	Indirect evidence	Palma, SpainHQ checked Sep 28, 2026	51-200	116 contacts →
	Indirect evidence “As of 2004 and during the last 20 years, Preverisk Group has established itself within the international auditing, consultancy and training environment, servicing touristic and…” Source: RevenueBase Database · checked Sep 28, 2026
11	Ledamc	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	94 contacts →
	Indirect evidence “LedaMC helps its clients to increase the IT contribution to business through improvement of providers’ management, increase in productivity, software testing optimization, quality…” Source: RevenueBase Database · checked Sep 28, 2026
12	Faura-Casas, Auditors-Consultors, SL	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	51-200	85 contacts →
	Indirect evidence “Firma líder en servicios de Auditoría y Consultoría, con más de 25 años de experiencia, asumiendo una reconocida especialización en los sectores público y hospitalario, y…” Source: RevenueBase Database · checked Sep 28, 2026
13	GIS Group Global Inspection Services	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	67 contacts →
	Indirect evidence “Global Inspection Services (GIS) is a high performance inspection, testing & certification organization that provides services for EPC, Owners, Vendors, among other clients.” Source: RevenueBase Database · checked Sep 28, 2026
14	Eudita	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	501-1,000	61 contacts →
	Indirect evidence “Servicios de Auditoría y Consultoría.” Source: RevenueBase Database · checked Sep 28, 2026
15	Ibercal	Indirect evidence	Valle De Trápaga, SpainHQ checked Sep 28, 2026	51-200	58 contacts →
	Indirect evidence “IBERCAL fue fundada en Bilbao, en Septiembre de 2002, y su experiencia es consecuencia de la intensa actividad desarrollada durante los últimos diez años, así como de la destreza…” Source: RevenueBase Database · checked Sep 28, 2026
16	Comser	Partial evidence	Terrassa, SpainHQ checked Sep 28, 2026	11-50	54 contacts →
	Partial evidence “COMSER es una empresa dedicada a dar servicio de consultoría, validación, audits e ingeniería para el sector regulado GMP con un alto grado de adaptación a las diferentes…” Source: RevenueBase Database · checked Sep 28, 2026
17	Activa Auditoria & Consultoria	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	11-50	54 contacts →
	Indirect evidence “Empresa de servicios profesionales especializada en auditoría, servicios de aseguramiento y consultoría.” Source: RevenueBase Database · checked Sep 28, 2026
18	Prysma	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	48 contacts →
	Indirect evidence “Servicios Profesionales de Transformación de Negocio, Tecnología, Servicios de Inspección Avanzada y Proyectos Internacionales.” Source: RevenueBase Database · checked Sep 28, 2026
19	Biotecnal	Indirect evidence	Sant Quize Valles, SpainHQ checked Sep 28, 2026	51-200	44 contacts →
	Indirect evidence “Biotecnal realiza ensayos analíticos enfocados al aseguramiento de la calidad y cumplimiento de la normativa.” Source: RevenueBase Database · checked Sep 28, 2026
20	Internet Security Auditors	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	11-50	42 contacts →
	Indirect evidence “Experts in #Cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
21	Grupo Acms Consultores	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	11-50	38 contacts →
	Indirect evidence “Grupo ACMS es un grupo empresarial que opera, desde hace más de 12 años, a nivel nacional y cuya actividad principal es el diseño, implantación y mantenimiento de Sistemas de…” Source: RevenueBase Database · checked Sep 28, 2026
22	Worldlex	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	11-50	37 contacts →
	Indirect evidence “Worldlex is formed by a team of lawyers, technicians and consultants with over 30 years of experience in the environment, health and safety, quality and food safety international…” Source: RevenueBase Database · checked Sep 28, 2026
23	Capital Auditors & Consultants	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Expertos en consultoría, asesoría y auditoría para todo tipo de empresas.” Source: RevenueBase Database · checked Sep 28, 2026
24	Grupo DE Auditores Públicos	Indirect evidence	Málaga, SpainHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence “GRUPO DE AUDITORES PÚBLICOS es el resultado de la unión de diferentes profesionales con el objetivo de proporcionar un servicio uniforme y de alto valor añadido en los sectores de…” Source: RevenueBase Database · checked Sep 28, 2026
25	ABA Consultores Y Auditores DE Cuentas	Indirect evidence	Granada, SpainHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “ABA Consultores y Auditores de Cuentas se constituye para asesorar y representar a nuestros clientes, con la mayor eficiencia y agilidad en las áreas de Auditoría de Cuentas…” Source: RevenueBase Database · checked Sep 28, 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: iso audit consulting companies. 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 iso audit consulting companies.
Partial evidence: Its own public description names part of iso audit consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name iso audit consulting companies. 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 661 iso audit consulting companies based in Spain

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Iso audit consulting companies based in Spain at a glance

As of Sep 28, 2026

6.5%Verified-email coverage

64.4Average contacts per company

1-10Median size (employees)

21.5%Largest-city concentration · Madrid

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

446

11-50

166

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 661 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 iso audit consulting companies, 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 “iso audit consulting companies”. 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 iso audit consulting companies), 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 iso audit consulting companies, 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, 2,767 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 28, 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.

Iso audit consulting companies by metro

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 iso audit consulting companies, 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 iso audit consulting companies are there based in Spain?

RevenueBase identified 661 iso audit consulting companies 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?

Autonomo, headquartered in Cordoba, tops this list with the largest team on record.

Which city has the most iso audit consulting companies?

Madrid leads with 142 headquartered companies, followed by Barcelona (65) and Valencia (31).

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 2,767 verified decision-maker contacts tracked across these 661 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 28, 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.