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List of professional services firms in Spain

Tamtam tracks 522 professional services firms headquartered in Spain. This list ranks the 100 largest by number of employees on LinkedIn, led by Freelance, Autónomo and Minsait. Their median headcount is 1,701. Half of them were founded in 1992 or later. The most common headquarters are Madrid (47), Barcelona (10) and Seville (5).

🇪🇸 Spain100 companiesUpdated Nov 11, 2026

These Spanish professional services firms are predominantly large organizations, many with a global presence, specializing in IT, business consulting, and engineering. Freelance offers expert consultancy for technological product development, while Minsait is a global IT consultant. Applus+ provides testing, inspection, and certification services, and Tecnicas Reunidas specializes in engineering and construction of industrial facilities.

A significant number of these firms, including NTT DATA Europe & Latam, Applus+, Tecnicas Reunidas, Grupo Tragsa, and Accenture España, are headquartered in Madrid, indicating a concentration of large professional services operations in the capital city.

#CompanyIndustryHeadquarters EmployeesFounded
1
Freelanceondira.com

Specializing in guiding the development, funding, and market launch of technological products through expert consultancy services

Business Consulting and Services 🇪🇸 Seville 108,120 2017
2
Autónomox

Specializing in LOPD compliance, auditing, AGPDE registration, drafting security documents, and customizing clauses in contracts for companies

Legal Services 🇪🇸 Badalona 66,296 n/a
3
Minsaitminsait.com

A leading Spanish technological consultant operating globally, leveraging cloud, security, payments, and innovative technology to drive business and societal impact #MoreMinsait

IT Services and IT Consulting 🇪🇸 Alcobendas 45,000 2016
4
NTT DATA Europe & Latamnttdata.com

Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future

IT Services and IT Consulting 🇪🇸 Madrid 31,932 n/a
5
Applus+applus.com

A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance

Business Consulting and Services 🇪🇸 Madrid 20,046 n/a
6
Tecnicas Reunidastecnicasreunidas.es

An international general contractor specializing in engineering and construction of industrial facilities in oil & gas, refining, power generation, infrastructures, and energy transition

Engineering Services 🇪🇸 Madrid 12,368 1960
7
Grupo Tragsatragsa.es

Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors.

Environmental Services 🇪🇸 Madrid 12,239 1977
8
Law firmxx

Specializes in aviation-related contracts focusing on civil aircraft engine maintenance and worldwide engine leasing services for clients.

Law Practice 🇪🇸 12,081 n/a
9
Ayesaayesa.com

Global provider of technology and engineering services with expertise in digital solutions, infrastructure design, and supervision for private and public sectors worldwide

Business Consulting and Services 🇪🇸 Seville 11,405 1966
10
SEIDORseidor.com

Helps clients transform and compete through technology and innovation, focusing on human values, sustainability, and partnering with leading tech innovators globally.

IT Services and IT Consulting 🇪🇸 Barcelona 8,352 n/a
11
ILUNIONilunion.com

A group of companies focused on creating a more accessible world, reinventing themselves daily to compete and move forward

Business Consulting and Services 🇪🇸 Madrid 8,198 2014
12
Externagrupoexterna.es

A provider of comprehensive outsourcing services, specializing in efficient resource management and tailored solutions to enhance productivity and cost savings for clients

Human Resources Services 🇪🇸 A Coruña 7,000 2006
13
Tragsatectragsa.es

Tragsatec offers engineering and technical assistance in various fields including environmental, agricultural, fisheries, infrastructures, and information technologies, focusing on innovation and quality services

Environmental Services 🇪🇸 6,560 1989
14
Accenture Españaaccenture.com

A global professional services company helping businesses and governments with digital transformation, cloud technology, data analytics, and industry expertise to drive tangible outcomes

Business Consulting and Services 🇪🇸 Madrid 6,208 n/a
15
INECOineco.com

A leading engineering and consulting firm in sustainable mobility and digital transformation, with a global presence and a focus on innovation

Civil Engineering 🇪🇸 Madrid 5,743 1968
16
despacho de abogadostitular

Specializing in criminal, family, and civil law services

Legal Services 🇪🇸 Salamanca 5,728 n/a
17
KPMG Españakpmg.com

Professional services firm providing audit, tax, legal, financial, and business advisory with global expertise and local market knowledge.

Professional Services 🇪🇸 Madrid 5,523 n/a
18
IDOM Consulting, Engineering, Architectureidom.com

A multinational consulting, engineering, and architecture firm offering personalized client services, delivering independent, impartial global projects with a diverse, engaged workforce

Engineering Services 🇪🇸 Bilbao 5,424 1957
19
Senergroup.sener

Responds to demanding challenges with innovative, efficient solutions, advancing society across aerospace, defense, energy, mobility, data centers, and digital sectors for 70 years.

Engineering Services 🇪🇸 Getxo 4,878 1956
20
Management Solutionsmanagementsolutions.com

Providing consulting services in strategy, organization, risk management, and technology for financial, energy, and telecommunications sectors worldwide.

Business Consulting and Services 🇪🇸 Madrid 4,798 2002
21
Quirónprevenciónquironprevencion.com

Providing occupational risk prevention services, promoting workplace safety, and caring for employee health across multiple countries and industries.

Business Consulting and Services 🇪🇸 Madrid 4,503 2017
22
VASSvasscompany.com

Global technology company specializing in intelligent digital transformation, integrating technology, data, and AI to help organizations achieve sustainable competitive advantages across various sectors.

IT Services and IT Consulting 🇪🇸 Alcobendas 4,482 n/a
23
Babelbabelgroup.com

International team providing specialized technology solutions and consulting to help major clients overcome digital business challenges effectively.

IT Services and IT Consulting 🇪🇸 Las Rozas de Madrid 4,333 2003
24
Randstad Españarandstad.es

Leading provider of human resources solutions in Spain, offering recruitment, training, temporary staffing, and workforce consulting services.

Human Resources Services 🇪🇸 Madrid 4,014 n/a
25
Marktel Global Services SAmarktel.es

A group specializing in BPO, Contact Center, and Technology Outsourcing services, providing global solutions with high levels of specialization

Professional Services 🇪🇸 Madrid 4,000 2000
26
Nadaestudionada.com

An interior architecture and design studio based in Barcelona and Valencia, creating honest, pure, and timeless spaces with a focus on sustainability and functionality

Design Services 🇪🇸 Barcelona 3,790 2017
27
PwC Españapwc.es

Provides audit, tax, legal, consulting, and transaction services across Spain, helping businesses navigate change and build trust.

Business Consulting and Services 🇪🇸 Madrid 3,761 1929
28
Oesiagrupooesia.com

Oesía is a multinational technology consultancy firm with divisions in ICT and security/defense, specializing in projects for clients worldwide Their innovative solutions and services drive value and growth

IT Services and IT Consulting 🇪🇸 Rivas 3,697 1976
29
hiberushiberus.com

This company provides technology consulting and digital transformation services, offering specialized solutions across various sectors with a large professional team globally.

IT Services and IT Consulting 🇪🇸 Zaragoza 3,616 2011
30
Applus+ Idiadaapplusidiada.com

Global automotive partner providing design, engineering, testing, homologation, and validation services with advanced facilities and expert professionals worldwide.

Motor Vehicle Manufacturing 🇪🇸 Santa Oliva 3,500 1971
31
OCA GLOBALocaglobal.com

Inspection, quality control, certification, testing, consulting, and training services for diverse industries across multiple countries with international accreditations.

Business Consulting and Services 🇪🇸 Sant Cugat del Vallès 3,275 2010
32
Plexus Techplexus.es

A technology company specializing in various sectors, offering 360º services with a focus on innovation to enhance people's lives

IT Services and IT Consulting 🇪🇸 Santiago de Compostela 3,154 2000
33
Garriguesgarrigues.com

An international team of legal and tax experts providing top-quality services with commitment to ethics and innovation, helping businesses in various countries

Legal Services 🇪🇸 Madrid 2,990 1941
34
VITALYvitaly.es

A company formed by the merger of Cualtis and Grupo Preving, specializing in occupational health and risk prevention services tailored to each company's needs

Business Consulting and Services 🇪🇸 Badajoz 2,923 1988
35
TYPSAtypsa.com

A group of consulting engineering firms specializing in civil engineering, architecture, building technology, energy, and environmental projects worldwide since 1966

Engineering Services 🇪🇸 San Sebastián de los Reyes 2,755 1966
36
Servinformservinform.es

Providing customized technology solutions including RPA and AI to optimize resources, reduce time, and increase benefits across multiple industries.

IT Services and IT Consulting 🇪🇸 Madrid 2,718 1977
37
Cuatrecasascuatrecasas.com

An international law firm with expertise in business law, serving clients across Spain, Portugal, Latin America, and beyond with a diverse team of over 1,900 professionals

Law Practice 🇪🇸 Barcelona 2,540 1917
38
FI Groupfi-group.us

Global consulting company specializing in managing funding incentives for R&D tax reliefs and grants in 15 countries, helping companies finance innovation and secure funding

Business Consulting and Services 🇪🇸 Santa Coloma de Cervelló 2,510 2000
39
Avanta Prevenciónavantaprevencion.com

Valora Prevención de Avanta Salud offers a prevention service for businesses, focusing on improving worker health, reducing risks, and ensuring legal compliance

Business Consulting and Services 🇪🇸 Quart de Poblet 2,500 n/a
40
knowmad moodknowmadmood.com

A leading digital transformation company focused on innovation, sustainability, and talent development Committed to adding value, creativity, and technology expertise

IT Services and IT Consulting 🇪🇸 Las Rozas 2,306 1994
41
Estudio de Arquitecturagabaldonarquitecto.es

A Sevilla-based company since 1994, specializing in residential, commercial, and industrial building projects with a focus on customized architecture and energy efficiency

Architecture and Planning 🇪🇸 Seville 2,258 1994
42
Profesional Idependientecp-barcelona.com

The company offers Coaching Psychology services for individuals, Supervision for coaches and psychologist coaches, and promotes health and leadership competencies

Human Resources Services 🇪🇸 Barcelona 2,152 2005
43
Ibermáticaayesa.com

A leading Spanish IT services company offering consulting, infrastructure services, system integration, outsourcing, and ERP solutions across multiple industries

IT Services and IT Consulting 🇪🇸 Donostia-San Sebastian 2,144 1973
44
Applus+ Europeapplus.com

A global leader in testing, inspection, and certification services, offering innovative solutions for asset management, compliance inspections, and technical support

Business Consulting and Services 🇪🇸 Madrid 1,963 1981
45
COMINTON, Marketing internacional y comercio exterior.cominton.es

International consultancy specializing in foreign trade, online marketing, social media, and networking Official ICEX consultant providing training in international marketing and communication

International Trade and Development 🇪🇸 Zaragoza 1,863 2004
46
IMAN GROUPimancorp.es

Provider of comprehensive external services including temporary work, direct recruitment, security, cleaning, reception, training, and consultancy for the food industry, nationally and internationally

Business Consulting and Services 🇪🇸 Terrassa 1,823 n/a
47
Entelgyentelgy.com

A global consultancy that accelerates business transformation through innovative technological solutions, helping clients adapt and thrive in a constantly changing world

IT Services and IT Consulting 🇪🇸 Madrid 1,796 n/a
48
STRATESYSstratesys-ts.com

Multinational company specializing in leading technology platforms, development of new applications, and digital solutions across various industries in Europe and America

IT Services and IT Consulting 🇪🇸 Madrid (Headquarters) 1,740 1997
49
ISDEFEisdefe.es

Provides innovative, reliable, sustainable solutions to government challenges, offering consulting, engineering services, and managing aerospace complexes for defense and administration.

Engineering Services 🇪🇸 Madrid 1,732 1985
50
NWorld Advisory, Tech & Operationsn.world

A group of specialized companies offering services in various stages of the value chain: Nfq, Nter, and Nforce

Business Consulting and Services 🇪🇸 Madrid 1,701 n/a

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51
Safeguard Global Staff Leasing Spainsafeguardglobal.com

A global company providing Direct Hire and Temporary Staffing services in over 170 countries with a dedicated team of over 2000 professionals

Staffing and Recruiting 🇪🇸 Madrid 1,700 2008
52
LLYCllyc.global

A creative partner specializing in marketing and corporate affairs to enhance and protect businesses through boldness, innovation, and influence

Public Relations and Communications Services 🇪🇸 Madrid 1,649 1995
53
Applus+ Oil and Gasapplus.com

A global leader in testing, inspection, and certification services, focusing on enhancing quality, safety, and environmental performance across various industries

Business Consulting and Services 🇪🇸 Madrid 1,583 1937
54
IZERTISizertis.com

Provider of information and communication technology solutions, assisting clients in achieving business goals through long-term partnerships for technological platform development

IT Services and IT Consulting 🇪🇸 Gijón 1,511 1996
55
MAGMACULTURA, S.L.magmacultura.com

MagmaCultura brings together experienced professionals to offer cultural management solutions that optimize resources for tourism, education, and heritage preservation

Museums, Historical Sites, and Zoos 🇪🇸 Barcelona 1,500 1992
56
GRUPO V3v3data.com.br

V3 Capital specializes in Transformational Management, improving business execution through impactful actions and the V3 Capital Platform, transforming individuals and optimizing potential

Professional Services 🇪🇸 Vitória 1,500 2020
57
SENASAsenasa.es

Specialized in training and consultancy for air navigation and security, focusing on aviation professionals and technical assistance to civil aviation authorities

Airlines and Aviation 🇪🇸 Madrid 1,463 1991
58
THE CT ENGINEERING GROUPctengineeringgroup.com

An international engineering company offering services from design to manufacturing engineering, R&D projects, and after-sales support in various sectors worldwide

IT Services and IT Consulting 🇪🇸 Getafe 1,453 1988
59
SATECsatec.es

A global system integrator specializing in IT consulting, BPO services, industry 40 solutions, and turnkey software projects since 1988

IT Services and IT Consulting 🇪🇸 Pozuelo de Alarcón 1,426 1988
60
OTRA COSAgp-grup.com

Specialized expert judicial cabinet providing a wide range of expert opinions and reports across various disciplines in Spain Skilled judicial experts available nationwide

Legal Services 🇪🇸 Barcelona 1,415 1996
61
Nfq Advisory, Solutions, Outsourcingnfq.es

Consulting firm specializing in banking, insurance, capital markets with advisory, software solutions, and outsourcing services for financial institutions.

Business Consulting and Services 🇪🇸 Madrid 1,393 2010
62
Cresa Iberiacresa.com

Real estate consultancy offering comprehensive customer service throughout their transformation process, focusing beyond just the physical space

Real Estate 🇪🇸 Madrid 1,373 n/a
63
Best Relationsagencia.best

A PR and social media consulting firm founded in 1998, specializing in strategic thinking for content creation, audience targeting, and marketing goals across various industries

Public Relations and Communications Services 🇪🇸 Madrid 1,316 1998
64
AENORaenor.com

A global company specializing in Testing, Inspection, and Certification services to help organizations overcome competitiveness gaps and build trust through training and information services

International Trade and Development 🇪🇸 Madrid 1,295 1986
65
Sngularsngular.com

A next-generation technology partner delivering innovative solutions with deep expertise, a global network of innovators, and a focus on sustainability

IT Services and IT Consulting 🇪🇸 Madrid 1,285 2014
66
TÜV Rheinland Europetuv.com

Ensures quality, safety, and efficiency through testing, certifying products, plants, processes, and management systems, alongside qualifying specialists and training individuals for companies globally.

Public Safety 🇪🇸 Madrid 1,268 n/a
67
Capitolecapitole-consulting.com

IT consulting company specializing in software development, testing, digital transformation, offering diverse projects, training, team building, and flexible benefits.

IT Services and IT Consulting 🇪🇸 Barcelona 1,248 2015
68
Tekneiteknei.com

A leading technology services and consulting firm specializing in innovative digital solutions, business automation, cybersecurity, and infrastructure modernization, with a focus on fostering innovation and collaboration among its team

IT Services and IT Consulting 🇪🇸 Bilbao 1,242 2010
69
ManpowerGroup Spainmanpowergroup.es

Global leader in innovative talent strategy solutions, offering services in recruitment, assessment, training, career development, outsourcing, and consulting to drive business and individual success

Human Resources Services 🇪🇸 Madrid 1,224 1988
70
Uría Menéndezuria.com

International law firm with nearly 600 lawyers across 11 offices, specializing in Iberian and Latin American markets, collaborating globally.

Legal Services 🇪🇸 Madrid 1,213 1947
71
AURENauren.com

Auren is a Spanish firm specializing in advanced audit, advisory, and consulting services to improve company management through innovation, quality, and professional ethics

Business Consulting and Services 🇪🇸 Madrid 1,165 n/a
72
EAG (Empresarios Agrupados - GHESA)empresariosagrupados.es

A leading European engineering group with expertise in complex projects, operating internationally with a large workforce and significant turnover

Engineering Services 🇪🇸 Madrid 1,161 1963
73
Eptisaeptisa.com

A multinational company specializing in engineering, consultancy, information technologies, and social development with a focus on sustainable solutions and client satisfaction

Engineering Services 🇪🇸 Madrid 1,155 1956
74
Empleado Informadoinstagram.com

A blog providing information on labor law, offering quick access on Instagram Consult with their lawyers for private advice on labor issues

Information Services 🇪🇸 Madrid 1,136 n/a
75
JUNGLEwejungle.com

An ecosystem of creative companies specializing in transforming businesses using creativity across strategy, design, advertising, digital production, and more

Business Consulting and Services 🇪🇸 Madrid 1,116 2019
76
EULEN Flexiplánflexiplan.eulen.com

With over 45 years of experience, the company offers recruitment, selection, and placement services for professionals, utilizing innovative HR technologies like E-recluitment and E-contracting

Human Resources Services 🇪🇸 Madrid 1,109 n/a
77
ICPicp.es

Leading logistics company in Spain offering tailored solutions for various industries, equipped with advanced technology for efficient supply chain management and e-commerce integration

Transportation, Logistics, Supply Chain and Storage 🇪🇸 Meco 1,093 1997
78
CEMOSAcemosa.es

Specialized engineering and quality control services in construction, promoting knowledge, innovation, and technology for over 45 years Offering services in multiple areas like engineering, geotechnics, and certification

Civil Engineering 🇪🇸 Málaga 1,092 1972
79
GHENOVAghenova.com

International engineering company offering multidisciplinary services in naval, defense, energy, digital transformation, and infrastructures with over 30 years of experience and 900 employees worldwide

Design Services 🇪🇸 Seville 1,072 2006
80
Seprotec Multilingual Solutionsseprotec.com

Provides translation, localization, interpretation, and intellectual property management services in 220 languages with global 24/7 support centers.

Translation and Localization 🇪🇸 Las Rozas 1,067 1989
81
LKS NEXTlksnext.com

The company provides comprehensive business consulting services with a focus on technology, finance, and legal support, working closely with clients for transformative and successful outcomes

IT Services and IT Consulting 🇪🇸 Mondragon - Arrasate 1,062 1991
82
profesional por cuenta propia | freelance | autónomooscar-web.eu

Specializing in drafting services for architecture, topography, public works, and engineering Over 15 years of experience in project drafting and collaboration with other professionals

Architecture & Planning 🇪🇸 Alfara del Patriarca 1,054 n/a
83
Grupo Constantgrupoconstant.com

Leader in HR outsourcing, facilities, and temporary work solutions Specializing in effective, innovative services, focusing on quality, authenticity, respect, and efficiency

Human Resources Services 🇪🇸 Barcelona 1,041 1987
84
Bluetab, an IBM Companybluetab.net

Support organizations in EMEA and America with data readiness, scalable data preparation, and GenAI implementation for data-driven culture.

IT Services and IT Consulting 🇪🇸 Madrid 1,036 2006
85
Apave Spain (antes Eurocontrol)eurocontrol.apave.com

EUROCONTROL provides a wide range of quality control and engineering services for industrial materials, equipment, and plants, including civil engineering projects

Engineering Services 🇪🇸 Madrid 1,030 1973
86
BDO Spainbdo.es

Global professional services firm providing audit, legal, advisory, and outsourcing tailored to diverse clients across industries and countries.

Business Consulting and Services 🇪🇸 Madrid 1,003 n/a
87
RDT ENGINEERSrdt.com

Development of advanced technological engineering and IT solutions providing clients competitive advantages with agility, flexibility, and sustainable innovation worldwide.

IT Services and IT Consulting 🇪🇸 Derio 985 2006
88
CHINAllyc.global

It is an advertising agency founded in 2010, focusing on solving client problems rather than just managing accounts for advertisers.

Advertising Services 🇪🇸 Madrid 978 2010
89
SDG Group Españasdggroup.com

Global consulting firm specializing in Data & Analytics, transforming organizations into successful data-driven enterprises through innovative analytics expertise and solutions

Business Consulting and Services 🇪🇸 Barcelona 974 1992
90
BBVA Asset Management en Españabbvaassetmanagement.com

A global asset management unit specializing in investment funds and pension management, known for innovation, excellence, and regional expertise

Investment Management 🇪🇸 Madrid 953 1985
91
ECIJAecija.com

A top-ranked law firm in Spain, ECIJA offers full-service legal assistance in Corporate, M&A, Commercial, TMT, labor, litigation, tax, and more across multiple countries

Legal Services 🇪🇸 Madrid 928 1997
92
PKF Attestpkf-attest.es

A leading professional services firm in Spain, part of PKF International Network, with over 600 professionals and 11 offices across the country

Business Consulting and Services 🇪🇸 Bilbao 904 1990
93
ASPY Prevenciónaspyprevencion.com

Specializing in occupational health and safety, the company offers tailored solutions to ensure compliance and promote excellence in prevention

Business Consulting and Services 🇪🇸 Barcelona 885 n/a
94
Grant Thornton Españagrantthornton.es

Leading global professional services provider, specializing in Audit, Business Consulting, Technology & Innovation, Tax, Legal, Financial, Labor, and Outsourcing services.

Business Consulting and Services 🇪🇸 Madrid 880 1984
95
Eurecat - Technology Centreeurecat.org

Leading technological center offering R&D, technological services, specialized training, consultancy, and industrial property exploitation for businesses of all sizes and sectors

Research Services 🇪🇸 Cerdanyola del Vallès 869 2013
96
The Cocktail

The Cocktail is a consultancy specializing in digital transformation projects, offering strategy development, design, technology, data analysis, and international solutions within WPP group

Business Consulting and Services 🇪🇸 Madrid 864 n/a
97
Cualtiscualtis.com

A prevention service accredited in four specialties nationwide, offering health, workplace environment, and productivity improvement solutions with various certifications and a digital management platform

Government Administration 🇪🇸 Madrid 853 2014
98
INERCOinerco.com

Provider of comprehensive services and advanced technologies for sustainable industrial development, specializing in emissions reduction, energy efficiency, renewables, and environmental consulting globally

Engineering Services 🇪🇸 Seville 852 1984
99
Marlexmarlex.net

A leading professional services firm specializing in HR solutions, offering Interim, Recruiting, and Executive services with over 25 years of experience

Human Resources Services 🇪🇸 Girona 852 n/a
100
Pérez-Llorcaperezllorca.com

A leading law firm in Spain, providing quality legal advice to national and international clients across various jurisdictions, with offices in major global cities

Legal Services 🇪🇸 Madrid 825 1983

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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