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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Freelanceondira.com
Specializing in guiding the development, funding, and market launch of technological products through expert consultancy services |
108,120 | |||
| 2 | 66,296 | ||||
| 3 |
Minsaitminsait.com
A leading Spanish technological consultant operating globally, leveraging cloud, security, payments, and innovative technology to drive business and societal impact #MoreMinsait |
45,000 | |||
| 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 |
31,932 | |||
| 5 |
Applus+applus.com
A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance |
20,046 | |||
| 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 |
12,368 | |||
| 7 |
Grupo Tragsatragsa.es
Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. |
12,239 | |||
| 8 | 12,081 | ||||
| 9 | 11,405 | ||||
| 10 |
SEIDORseidor.com
Helps clients transform and compete through technology and innovation, focusing on human values, sustainability, and partnering with leading tech innovators globally. |
8,352 | |||
| 11 |
ILUNIONilunion.com
A group of companies focused on creating a more accessible world, reinventing themselves daily to compete and move forward |
8,198 | |||
| 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 |
7,000 | |||
| 13 | 6,560 | ||||
| 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 |
6,208 | |||
| 15 | 5,743 | ||||
| 16 | 5,728 | ||||
| 17 |
KPMG Españakpmg.com
Professional services firm providing audit, tax, legal, financial, and business advisory with global expertise and local market knowledge. |
5,523 | |||
| 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 |
5,424 | |||
| 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. |
4,878 | |||
| 20 |
Management Solutionsmanagementsolutions.com
Providing consulting services in strategy, organization, risk management, and technology for financial, energy, and telecommunications sectors worldwide. |
4,798 | |||
| 21 |
Quirónprevenciónquironprevencion.com
Providing occupational risk prevention services, promoting workplace safety, and caring for employee health across multiple countries and industries. |
4,503 | |||
| 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. |
4,482 | |||
| 23 |
Babelbabelgroup.com
International team providing specialized technology solutions and consulting to help major clients overcome digital business challenges effectively. |
4,333 | |||
| 24 |
Randstad Españarandstad.es
Leading provider of human resources solutions in Spain, offering recruitment, training, temporary staffing, and workforce consulting services. |
4,014 | |||
| 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 |
4,000 | |||
| 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 |
3,790 | |||
| 27 |
PwC Españapwc.es
Provides audit, tax, legal, consulting, and transaction services across Spain, helping businesses navigate change and build trust. |
3,761 | |||
| 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 |
3,697 | |||
| 29 |
hiberushiberus.com
This company provides technology consulting and digital transformation services, offering specialized solutions across various sectors with a large professional team globally. |
3,616 | |||
| 30 |
Applus+ Idiadaapplusidiada.com
Global automotive partner providing design, engineering, testing, homologation, and validation services with advanced facilities and expert professionals worldwide. |
3,500 | |||
| 31 |
OCA GLOBALocaglobal.com
Inspection, quality control, certification, testing, consulting, and training services for diverse industries across multiple countries with international accreditations. |
3,275 | |||
| 32 |
Plexus Techplexus.es
A technology company specializing in various sectors, offering 360º services with a focus on innovation to enhance people's lives |
3,154 | |||
| 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 |
2,990 | |||
| 34 | 2,923 | ||||
| 35 | 2,755 | ||||
| 36 |
Servinformservinform.es
Providing customized technology solutions including RPA and AI to optimize resources, reduce time, and increase benefits across multiple industries. |
2,718 | |||
| 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 |
2,540 | |||
| 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 |
2,510 | |||
| 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 |
2,500 | |||
| 40 |
knowmad moodknowmadmood.com
A leading digital transformation company focused on innovation, sustainability, and talent development Committed to adding value, creativity, and technology expertise |
2,306 | |||
| 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 |
2,258 | |||
| 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 |
2,152 | |||
| 43 |
Ibermáticaayesa.com
A leading Spanish IT services company offering consulting, infrastructure services, system integration, outsourcing, and ERP solutions across multiple industries |
2,144 | |||
| 44 |
Applus+ Europeapplus.com
A global leader in testing, inspection, and certification services, offering innovative solutions for asset management, compliance inspections, and technical support |
1,963 | |||
| 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 |
1,863 | |||
| 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 |
1,823 | |||
| 47 |
Entelgyentelgy.com
A global consultancy that accelerates business transformation through innovative technological solutions, helping clients adapt and thrive in a constantly changing world |
1,796 | |||
| 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 |
1,740 | |||
| 49 | 1,732 | ||||
| 50 |
NWorld Advisory, Tech & Operationsn.world
A group of specialized companies offering services in various stages of the value chain: Nfq, Nter, and Nforce |
1,701 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 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 |
1,700 | |||
| 52 |
LLYCllyc.global
A creative partner specializing in marketing and corporate affairs to enhance and protect businesses through boldness, innovation, and influence |
1,649 | |||
| 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 |
1,583 | |||
| 54 |
IZERTISizertis.com
Provider of information and communication technology solutions, assisting clients in achieving business goals through long-term partnerships for technological platform development |
1,511 | |||
| 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 |
1,500 | |||
| 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 |
1,500 | |||
| 57 | 1,463 | ||||
| 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 |
1,453 | |||
| 59 | 1,426 | ||||
| 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 |
1,415 | |||
| 61 |
Nfq Advisory, Solutions, Outsourcingnfq.es
Consulting firm specializing in banking, insurance, capital markets with advisory, software solutions, and outsourcing services for financial institutions. |
1,393 | |||
| 62 |
Cresa Iberiacresa.com
Real estate consultancy offering comprehensive customer service throughout their transformation process, focusing beyond just the physical space |
1,373 | |||
| 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 |
1,316 | |||
| 64 | 1,295 | ||||
| 65 |
Sngularsngular.com
A next-generation technology partner delivering innovative solutions with deep expertise, a global network of innovators, and a focus on sustainability |
1,285 | |||
| 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. |
1,268 | |||
| 67 |
Capitolecapitole-consulting.com
IT consulting company specializing in software development, testing, digital transformation, offering diverse projects, training, team building, and flexible benefits. |
1,248 | |||
| 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 |
1,242 | |||
| 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 |
1,224 | |||
| 70 |
Uría Menéndezuria.com
International law firm with nearly 600 lawyers across 11 offices, specializing in Iberian and Latin American markets, collaborating globally. |
1,213 | |||
| 71 | 1,165 | ||||
| 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 |
1,161 | |||
| 73 |
Eptisaeptisa.com
A multinational company specializing in engineering, consultancy, information technologies, and social development with a focus on sustainable solutions and client satisfaction |
1,155 | |||
| 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 |
1,136 | |||
| 75 |
JUNGLEwejungle.com
An ecosystem of creative companies specializing in transforming businesses using creativity across strategy, design, advertising, digital production, and more |
1,116 | |||
| 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 |
1,109 | |||
| 77 | 1,093 | ||||
| 78 | 1,092 | ||||
| 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 |
1,072 | |||
| 80 |
Seprotec Multilingual Solutionsseprotec.com
Provides translation, localization, interpretation, and intellectual property management services in 220 languages with global 24/7 support centers. |
1,067 | |||
| 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 |
1,062 | |||
| 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 |
1,054 | |||
| 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 |
1,041 | |||
| 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. |
1,036 | |||
| 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 |
1,030 | |||
| 86 | 1,003 | ||||
| 87 |
RDT ENGINEERSrdt.com
Development of advanced technological engineering and IT solutions providing clients competitive advantages with agility, flexibility, and sustainable innovation worldwide. |
985 | |||
| 88 |
CHINAllyc.global
It is an advertising agency founded in 2010, focusing on solving client problems rather than just managing accounts for advertisers. |
978 | |||
| 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 |
974 | |||
| 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 |
953 | |||
| 91 | 928 | ||||
| 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 |
904 | |||
| 93 |
ASPY Prevenciónaspyprevencion.com
Specializing in occupational health and safety, the company offers tailored solutions to ensure compliance and promote excellence in prevention |
885 | |||
| 94 |
Grant Thornton Españagrantthornton.es
Leading global professional services provider, specializing in Audit, Business Consulting, Technology & Innovation, Tax, Legal, Financial, Labor, and Outsourcing services. |
880 | |||
| 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 |
869 | |||
| 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 |
864 | |||
| 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 |
853 | |||
| 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 |
852 | |||
| 99 |
Marlexmarlex.net
A leading professional services firm specializing in HR solutions, offering Interim, Recruiting, and Executive services with over 25 years of experience |
852 | |||
| 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 |
825 | |||
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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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