This selection of professional services firms in Rio de Janeiro State includes a mix of business consulting, legal, and communication agencies. Most are mid-sized to large firms, with a strong concentration in the city of Rio de Janeiro. Companies such as Infotec Brasil offer outsourcing services, while FSB Comunicação specializes in integrated corporate communications. BMA Advogados provides comprehensive legal support, and Doméstica Legal focuses on services for domestic employers and workers.
A notable pattern is the dominance of companies headquartered in Rio de Janeiro city, indicating a central hub for professional services in the state. Several firms also have a long history, with Dannemann Siemsen, a leader in Intellectual Property, founded in 1900, and Grupo SERES, an HR solutions provider, established in 1964.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Infotec Brasilinfotecbrasil.com.br
Specializing in Outsourcing Services and Processes, the company offers efficiency, cost reduction, and environmental care through various specialized services |
3,753 | |||
| 2 |
Doméstica Legalgo.domesticalegal.com.br
Providing a secure and reliable environment for employers and domestic workers, ensuring obligations are met to prevent labor disputes and promote peace of mind |
1,825 | |||
| 3 |
home officerodrigomuller.com.br
Specializing in minimalistic design, the company focuses on sleek and understated aesthetics, offering products or services tailored to those who appreciate simplicity and elegance |
1,792 | |||
| 4 |
FSB Comunicaçãofsb.com.br
An Integrated Communications agency specializing in Corporate Communications, Media Relations, Brand Building, Digital Communications, Research, and Design & Content services |
1,386 | |||
| 5 |
BMA Advogadosbmalaw.com.br
A leading Latin American law organization offering comprehensive legal support in various business areas for Brazilian and international clients since 1995 |
1,022 | |||
| 6 |
Visagiovisagio.com
Part of Visagio Group, specializing in providing solutions and services in diverse industries |
927 | |||
| 7 |
EloGroupelogroup.com
A business transformation platform integrating Technology, Analytics, and Management expertise to develop digital solutions that drive change for organizations |
922 | |||
| 8 |
Guanabaraguanabaraconsulting.com
Specialized services provider offering strategic expertise in energy sectors, focusing on strategic planning, business development, M&A, market entry strategies, and more |
911 | |||
| 9 |
Dannemann Siemsendannemann.com.br
Leader in Intellectual Property in Latin America since 1900, providing legal advice and protection to domestic and foreign companies with expertise in patents, trademarks, and litigation |
854 | |||
| 10 |
Veirano Advogadosveirano.com.br
Leading Brazilian business law firm providing tailored solutions for multinational companies in strategic sectors, offering expertise in M&A, disputes, tax, infrastructure, and oil & gas industries |
829 | |||
| 11 |
CHALFIN, GOLDBERG & VAINBOIM Advogadoscgvadvogados.com.br
A leading Brazilian law group specialized in insurance, banking, labor, and real estate law, offering both litigation and consulting services nationwide |
796 | |||
| 12 |
CTA Engenhariactaengenharia.com.br
With over 20 years of experience, the organization provides engineering and contract management services nationwide, focusing on integrity, quality, and environmental responsibility |
746 | |||
| 13 |
Quality Assuranceqaconsultoria.com.br
Established in 1987, the organization specializes in implementing management systems based on international standards for various industries including oil, gas, and other sectors |
710 | |||
| 14 |
Sondotécnica Engenhariasondotecnica.com.br
A multidisciplinary engineering organization specializing in structural design, hydrology, oceanography, sediment transport, and feasibility studies with extensive project experience globally |
682 | |||
| 15 |
Domingues e Pinho Contadoresdpc.com.br
Leader in providing accounting outsourcing services in Brazil, offering excellent management services with a global vision for foreign investors Serving over 600 multinational clients |
654 | |||
| 16 |
Forship Engenhariaforship.com
Specialized engineering services and integrated solutions for industrial assets in various sectors worldwide, offering construction, commissioning, maintenance, consulting, and software solutions |
645 | |||
| 17 |
FGV DGPE
The Diretoria de Desenvolvimento da Gestão Pública e Políticas Educacionais focuses on improving public management and education policies to positively impact social indicators in Brazil |
593 | |||
| 18 |
Bichara Advogadosbicharalaw.com.br
A full-service legal team with over 150 lawyers across multiple locations, offering customized solutions to national and international clients |
538 | |||
| 19 |
SESATECHsesatech.com.br
Specialized in digital transformation and automation projects, offering solutions in applications, systems integration, AI, Big Data, Machine Learning, API's, and RPA Aiming for secure and efficient infrastructure modernization |
480 | |||
| 20 |
Iqony Solutions do Brasiliqony.com.br
Provider of professional energy services in South America Offers Engineering, Operation, and Maintenance services in the renewable energy sector with a focus on solar, wind, and thermal plants |
472 | |||
| 21 |
TO Brasilto-brasil.com
Providing technology and business solutions with global disruptive technologies, strategic partnerships, and continuous quality improvement for clients. |
460 | |||
| 22 |
Talentos Consultoriatalentosconsultoria.com.br
Specialized in human resources management, providing a wide range of services to optimize client's time and resources, enhancing business productivity |
453 | |||
| 23 |
Personale Consultoriapersonale.com.br
A leading HR consultancy offering customized solutions in talent management through recruitment, development, training, and strategic partnerships across Brazil |
446 | |||
| 24 |
Tauil & Chequer Advogados associado a Mayer Browntauilchequer.com.br
A Brazilian law office with a global reach, providing legal services to organizations in multijurisdictional operations with a focus on excellence and innovation |
445 | |||
| 25 |
GP Assessoria em Orgão Públicosgpassessoria.net.br
Assistance in legal documentation and guidance for selling to government entities, particularly for businesses new to this process |
439 | |||
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. | |||||
| 26 |
Guimarguimar.com.br
Specializing in managing implementation of industrial, infrastructure, and building projects, one of the largest engineering consultancies in the country Operating in Brazil and other South American countries |
437 | |||
| 27 |
JG Engenhariajgeng.com.br
Specializing in engineering services, including design, construction, and project management for various industries and infrastructure projects |
433 | |||
| 28 |
Gondim Albuquerque Negreiros ADVgondimadv.com.br
Specializing in high-volume litigation, this innovative team efficiently eliminates processes using technology, ensuring quick resolution without the need for ties |
421 | |||
| 29 |
rrarra.com.br
Mission-driven firm specializing in sustainable construction projects, offering innovative, market-adapted solutions in Architecture, Urbanism, and Landscaping with a focus on quality and client satisfaction |
408 | |||
| 30 |
Villemor Amaral Advogadosvillemor.com.br
Specialized multidisciplinary law office with a strong focus on being an extension of clients' internal teams, providing efficient and personalized legal services |
394 | |||
| 31 | 
Profissional Independente Jurídico
Legal professional specialized in electronic court procedures since 2000, handling various court systems and conducting out-of-court actions |
394 | |||
| 32 |
RSM BRASIL (ACAL)rsmbrasil.com.br
We are a bold organization offering customized services with innovative ideas, anticipating solutions, and providing alternative paths to exceed clients' expectations worldwide |
385 | |||
| 33 |
True Auditoria, Consultoria & Serviçostrueauditoria.com.br
A complete platform in the Health sector, applying modern concepts from Banking and Industry with a highly qualified and diverse team |
368 | |||
| 34 |
Winner RHwinnerrh.com.br
Specialized in HR consultancy, the company focuses on maximizing client results through tailored solutions, transparency, ethics, quality service, and respect for all stakeholders |
346 | |||
| 35 |
Outra Coisaoutracoisa.co
Specializing in digital product design for global clients, ranging from major corporations like Google and Coca-Cola to startups, creating engaging digital experiences for all |
345 | |||
| 36 |
Licks Attorneyslickslegal.com
Top-tier Brazilian law practice specializing in Intellectual Property, Life Sciences, Regulatory, Internet Law, Data Privacy, and Cyber Crime cases nationwide |
335 | |||
| 37 |
Durão & Almeida, Pontes Advocaciabrunoduraoadvocacia.com
We are a legal office that fights to change the lives of our clients through proactive, specialized, and innovative legal representation |
333 | |||
| 38 |
CF Contabilidadecfcontabilidade.com.br
Specializing in comprehensive business management solutions since 1989, prioritizing client growth through tailored processes, continuous improvement, and proactive consulting services |
331 | |||
| 39 |
SANDECHsandech.com.br
An engineering and management consulting firm providing high-tech solutions for various industries with a focus on innovation, quality, and employee development |
317 | |||
| 40 |
Rafael Freitas | Advogadorfreitasadv.com.br
Specialized legal consultancy in Civil Law, focusing on contracts, real estate, liability, consumer, and successions, offering personalized support with excellence |
317 | |||
| 41 |
FGV Projetosfgvprojetos.fgv.br
A consultancy unit applying academic knowledge to develop projects in economics, management, and public policies for public and private organizations |
310 | |||
| 42 |
ENGEMIP ENGENHARIA E MANUTENÇÃO.engemipengenharia.com.br
Provider of engineering services and maintenance |
307 | |||
| 43 |
Pellon Advocaciapellon.com.br
Specializing in Insurance and Reinsurance, the company also operates in Telecom, Banking, Public Utilities, Aviation, Transportation, Industry and Services sectors with international recognition |
295 | |||
| 44 |
Leaderleaderempresarial.com.br
Passionate about innovation and results, we are leaders in financial solutions with a focus on the Leader culture Embracing the future 🎯 #ShapingTheFuture |
283 | |||
| 45 |
Lifting Electriclifting.com.br
Specialized in repairing, maintaining, and installing electrical, electronic, instrumentation, and automation equipment for the naval and industrial sectors with multiple certifications for quality and safety standards |
236 | |||
| 46 |
Prodecprodec.com.br
The company, founded in Rio de Janeiro in 1970, specializes in engineering consulting, coordinating large projects nationally and internationally for over four decades |
235 | |||
| 47 |
VV Holding & Consultingvvconsulting.com.br
With nearly 15 years of experience, specializes in outsourcing skilled professionals and excels in project management for major industrial projects globally |
229 | |||
| 48 |
Jacobsenjacobsenarquitetura.com
Specializing in projects that harmoniously blend with nature, tailored to clients' visions, Jacobsen Arquitetura is a renowned architectural practice co-founded by Paulo and Bernardo Jacobsen |
213 | |||
| 49 |
FCDG Advogadosfcdg.com.br
Specialized in dispute resolution, offering representation in complex litigation, arbitrations, insolvency procedures, and negotiations Experienced team with solid academic backgrounds |
209 | |||
| 50 |
MJV Technology & Innovationmjvinnovation.com
Digitally-driven innovation agency offering end-to-end solutions, from research to IT implementation, with a multidisciplinary team focused on leveraging technology to solve business challenges globally |
199 | |||
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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 12, 2026.
More company lists in Rio de Janeiro State
- The largest companies in Rio de Janeiro State 1,426
- Retail chains in Rio de Janeiro State 171
- Critical infrastructure operators in Rio de Janeiro State 136
- Education providers in Rio de Janeiro State 123
- Healthcare providers in Rio de Janeiro State 104
- Retail companies in Rio de Janeiro State 100
- Financial services firms in Rio de Janeiro State 97
- Manufacturers in Rio de Janeiro State 97
- Multinational companies in Rio de Janeiro State 94
- Companies with a mobile app in Rio de Janeiro State 83
- Public sector organisations in Rio de Janeiro State 79
- E-commerce companies in Rio de Janeiro State 76
- Energy companies in Rio de Janeiro State 68
- Hospitals and Health Care companies in Rio de Janeiro State 66
- Financial Services companies in Rio de Janeiro State 58
- Logistics companies in Rio de Janeiro State 56
- Oil and Gas companies in Rio de Janeiro State 53
- Government Administration companies in Rio de Janeiro State 48
- Corporate groups and holding companies in Rio de Janeiro State 48
- Franchise networks in Rio de Janeiro State 45
- Higher Education companies in Rio de Janeiro State 45
- Companies with in-house R&D in Rio de Janeiro State 43
- Wellness and Fitness Services companies in Rio de Janeiro State 43
- Facility management companies in Rio de Janeiro State 39
The same list elsewhere in Brazil
- Professional services firms in Brazil 544
- Professional services firms in São Paulo State 265
- Professional services firms in Minas Gerais 62
- Professional services firms in Paraná 31
- Professional services firms in São Paulo 200
- Professional services firms in Rio de Janeiro 53
- Professional services firms in Belo Horizonte 46