Company lists · Data refreshed September 2026
Top 25 Iso certification consulting firms based in Spain
RevenueBase identified 741 iso certification consulting firms headquartered in Spain as of September 2026 and tracks 44,901 professional contacts across them, including 3,064 with verified work emails. Madrid is the largest hub.
This list covers iso certification consulting firms 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.
The 25 largest iso certification consulting firms based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6,478 contacts → | ||||
Partial evidence “Applus+ is a worldwide leader in the testing, inspection, and certification sector.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,690 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 386 contacts → | ||||
Indirect evidence “Somos una compañía cuya filosofía se basa en generar valor para nuestros clientes por medio de la mejora de la gestión de sus organizaciones.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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, 2026Thanks. The Data Team will review it. | |||||
| 9 | 166 contacts → | ||||
Indirect evidence “PrevenControl is the firm specialized in occupational health and safety that proposes effective and innovative solutions to improve the business and reputation of its clients…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 162 contacts → | ||||
Indirect evidence “Gesein nace en 1993 en Madrid.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
| 13 | 104 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 98 contacts → | ||||
Indirect evidence “Agencia de Certificación Española.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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, 2026Thanks. The Data Team will review it. | |||||
| 16 | 85 contacts → | ||||
Indirect evidence “Las empresas con sede en España Kiwa España, S.L.U.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 80 contacts → | ||||
Indirect evidence “CEISLAB, is a Spanish Company with a great deal of experience an technical knowledge in the conformity assessment field, as well as in developing and conducting tests and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 67 contacts → | ||||
Partial 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | 63 contacts → | ||||
Partial evidence “We are a cybersecurity company providing consulting and evaluation services under different evaluation methodologies such as LINCE, Common Criteria, FIPS 140-3, PCI-PTS, PCI-CPoC…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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, 2026Thanks. The Data Team will review it. | |||||
| 21 | 55 contacts → | ||||
Partial evidence “We are an independent consulting firm, specializing in providing engineering services, software development and management, whose main asset is the high technical level and the…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 54 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 23 | 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, 2026Thanks. The Data Team will review it. | |||||
| 24 | 41 contacts → | ||||
Indirect evidence “BSP CONSULTORES es una empresa privada, que nace de la experiencia de más de 20 años en trabajos de Control, Consultoría, Asistencia Técnica y Gestión de la Calidad en la…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 40 contacts → | ||||
Indirect evidence “TANDEM is an Industrial Safety and Environment consultancy, founded in 1995 and by a team of Engineers.” Source: RevenueBase Database · checked Sep 28, 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: iso certification consulting 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 iso certification consulting firms.
- Partial evidence
- Its own public description names part of iso certification consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name iso certification consulting 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 741 iso certification consulting firms based in Spain
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Iso certification consulting firms based in Spain at a glance
As of Sep 28, 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 741 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 certification consulting 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 Spain whose own description of what they do matches “iso certification consulting 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 iso certification consulting 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 iso certification consulting firms, 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, 3,064 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 certification consulting firms 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 certification consulting 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 iso certification consulting firms are there based in Spain?
RevenueBase identified 741 iso certification consulting firms 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 certification consulting firms?
Madrid leads with 136 headquartered companies, followed by Barcelona (69) and Valencia (29).
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 3,064 verified decision-maker contacts tracked across these 741 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.
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