# Top 50 cybersecurity companies in Brazil

Tamtam tracks 58 cybersecurity companies headquartered in Brazil. This list ranks the 50 largest by number of employees on LinkedIn, led by Oi, Stefanini Brasil and Valid. Their median headcount is 655. Half of them were founded in 1996 or later. The most common headquarters are São Paulo (20), Belo Horizonte (4) and Rio de Janeiro (4).

This selection of Brazilian cybersecurity companies primarily features large IT services and consulting firms, with a strong presence of established players. Oi, a telecommunications giant, focuses on high-speed connectivity and digital services. Stefanini Brasil provides global IT services, while Valid offers secure identification services. Montreal Oficial specializes in IT solutions, and T-Systems do Brasil delivers integrated IT and communications technology solutions.

A clear pattern among these companies is their focus on comprehensive IT solutions, digital transformation, and business process outsourcing, often incorporating cybersecurity as part of a broader offering. A significant number of these larger firms are headquartered in São Paulo, indicating a concentration of the IT services sector in that city.

🇧🇷 Brazil · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Oi](https://www.tamtam.ai/c/oi-rio-de-janeiro) (oi.com.br)<br>We are focused on bringing digital life to everyone through high-speed connectivity, digital services, environmental commitment, diversity, and initiatives in education and innovation | Telecommunications | 🇧🇷 Rio de Janeiro | 20,150 |  |
| 2 | [Stefanini Brasil](https://www.tamtam.ai/c/stefanini-brasil) (stefanini.com)<br>A global IT services provider offering consulting, integration, solution development, BPO, outsourcing, and technology-based business solutions in over 35 countries | Business Consulting and Services | 🇧🇷 São Paulo | 12,265 | 1987 |
| 3 | [Valid](https://www.tamtam.ai/c/valid-sao-paulo) (valid.com)<br>Providing secure, customized identification services using advanced technology for people, objects, and transactions in a trust-based economy. | IT Services and IT Consulting | 🇧🇷 São Paulo | 3,613 | 1957 |
| 4 | [Stefanini LATAM](https://www.tamtam.ai/c/stefanini-latam) (stefanini.com)<br>Provides integrated digital transformation services including consulting, AI, cybersecurity, banking, manufacturing, and digital marketing across 41 countries. | Business Consulting and Services | 🇧🇷 São Paulo | 2,651 | 1987 |
| 5 | [Montreal Oficial](https://www.tamtam.ai/c/montreal-oficial) (montreal.com.br)<br>A technology company in Brazil with over 30 years of experience, specializing in developing and implementing IT solutions for businesses globally | IT Services and IT Consulting | 🇧🇷 Belo Horizonte | 2,464 | 1986 |
| 6 | [Stefanini EMEA](https://www.tamtam.ai/c/stefanini-emea) (stefanini.com)<br>Global digital transformation accelerator with 35+ years experience offering diverse technology solutions and IT outsourcing services in 16 European countries | Business Consulting and Services | 🇧🇷 São Paulo | 2,420 | 1987 |
| 7 | [Unifique](https://www.tamtam.ai/c/unifique) (unifique.com.br)<br>Provides communication solutions: internet, TV, landline, mobile, and data center services for businesses, homes, and governments, with advanced technology and customer relationships. | Technology, Information and Internet | 🇧🇷 Timbó | 2,246 | 1997 |
| 8 | [Stefanini North America and APAC](https://www.tamtam.ai/c/stefanini-north-america-and-apac) (stefanini.com)<br>A multinational company offering innovative technological solutions to help clients transform their business through digital innovation and co-creation for a better future | IT Services and IT Consulting | 🇧🇷 São Paulo | 1,999 |  |
| 9 | [T-Systems do Brasil](https://www.tamtam.ai/c/t-systems-do-brasil) (t-systems.com)<br>Global leader in IT & Communications Technology, offering integrated solutions in Digital, SAP, Cloud, Infrastructure, and Security with focus on innovation and customer satisfaction | IT Services and IT Consulting | 🇧🇷 São Paulo | 1,528 |  |
| 10 | [Globalweb Corp](https://www.tamtam.ai/c/globalweb-corp) (globalweb.com.br)<br>Cloud services provider offering ERP, CRM, security, data storage, and infrastructure solutions tailored to enhance business competitiveness with modern technology services | IT Services and IT Consulting | 🇧🇷 São Paulo | 1,443 | 2010 |
| 11 | [Nava \| Tech for Business](https://www.tamtam.ai/c/nava-tech-for-business) (nava.com.br)<br>A technology company passionate about people and innovation, empowering employees to create solutions for leading companies to positively impact the world | IT Services and IT Consulting | 🇧🇷 Barueri | 1,374 | 1996 |
| 12 | [Lanlink Informática Ltda.](https://www.tamtam.ai/c/lanlink-informatica-ltda) (lanlink.com.br)<br>A technology solutions provider established in 1988, dedicated to delivering quality, excellence, and reliability for business needs with long-term client relationships | IT Services and IT Consulting | 🇧🇷 Fortaleza | 1,352 | 1988 |
| 13 | [RNP](https://www.tamtam.ai/c/rnp) (rnp.br)<br>Provides secure, high-capacity internet and personalized services, promoting innovation for education and research across Brazil, connecting universities, institutes, and technology hubs. | Technology, Information and Internet | 🇧🇷 Rio de Janeiro | 1,336 | 1989 |
| 14 | [BrBPO](https://www.tamtam.ai/c/brbpo) (brbpo.com.br)<br>Brazilian capital-backed firm specialized in interactive client relationship management through integrated technology solutions, omnichannel platforms, and diverse service offerings across 12 strategic nationwide locations | IT Services and IT Consulting | 🇧🇷 Brasília | 1,332 |  |
| 15 | [who.](https://www.tamtam.ai/c/who) (whoid.com)<br>Enhance fraud prevention effectiveness with digital and human solutions focusing on Onboarding, Transactional, and Dispute stages, prioritizing ethics, transparency, and customer satisfaction | IT Services and IT Consulting | 🇧🇷 Belo Horizonte | 1,256 | 1994 |
| 16 | [SEK Security Ecosystem Knowledge](https://www.tamtam.ai/c/sek-security-ecosystem-knowledge) (sek.io)<br>Specialized consultancy providing continuous risk analysis and control services for large companies and organizations, with customized solutions tailored to each client's unique profile | Business Consulting and Services | 🇧🇷 Barueri | 1,067 | 1999 |
| 17 | [InterOp](https://www.tamtam.ai/c/interop) (interop.com.br)<br>Provides IT services including implementation, integration, monitoring, maintenance, and evolution of technology solutions for businesses of all sizes. | IT Services and IT Consulting | 🇧🇷 Porto Alegre | 936 | 1994 |
| 18 | [NTT DATA BRASIL](https://www.tamtam.ai/c/ntt-data-brasil) (nttdata.com)<br>Global IT services arm of NTT with over 75,000 employees in 40+ countries Leading provider of innovative IT solutions benefiting businesses and organizations | IT Services and IT Consulting | 🇧🇷 São Paulo | 921 | 1967 |
| 19 | [unico IDtech](https://www.tamtam.ai/c/unico-idtech) (unico.io)<br>Specializing in digital identity, we create solutions to simplify lives and boost businesses for millions of individuals and top firms in the country | IT Services and IT Consulting | 🇧🇷 São Paulo | 871 | 2007 |
| 20 | [Service IT.](https://www.tamtam.ai/c/service-it) (service.com.br)<br>Specializing in IT solutions and services such as outsourcing, cybersecurity, and consultation Providing monitoring and management through own operation centers in multiple countries | IT Services and IT Consulting | 🇧🇷 São Paulo | 751 | 1995 |
| 21 | [Delfia](https://www.tamtam.ai/c/delfia) (delfia.tech)<br>A Brazilian multinational specializing in digital curation, offering continuous training to curators to identify and implement innovative solutions for digital success | IT Services and IT Consulting | 🇧🇷 Barueri | 694 |  |
| 22 | [Certisign](https://www.tamtam.ai/c/certisign) (certisign.com.br)<br>Specializing in digital identification and security solutions for over 26 years, we provide secure and seamless digital experiences for individuals and businesses, reducing fraud and costs | IT Services and IT Consulting | 🇧🇷 São Paulo | 668 | 1996 |
| 23 | [RTM](https://www.tamtam.ai/c/rtm) (rtm.net.br)<br>Integrator hub in Brazilian financial market, providing secure technological solutions to over 700 institutions, connecting key players in the industry | IT Services and IT Consulting | 🇧🇷 São Paulo | 660 | 1997 |
| 24 | [ArcelorMittal Sistemas](https://www.tamtam.ai/c/arcelormittal-sistemas) (brasil.arcelormittal.com)<br>Develops and integrates IT solutions, including cybersecurity, cloud platforms, and SAP projects, to support global steel manufacturing operations with industrial digital efficiency. | IT Services and IT Consulting | 🇧🇷 Belo Horizonte | 657 | 1983 |
| 25 | [BHS](https://www.tamtam.ai/c/bhs-belo-horizonte) (bhs.com.br)<br>Specialists in delivering customized IT solutions to optimize businesses with services including IT infrastructure management, security, software development, collaboration portals, and outsourcing | IT Services and IT Consulting | 🇧🇷 Belo Horizonte | 655 | 1994 |
| 26 | [HS Prevent](https://www.tamtam.ai/c/hs-prevent) (hsprevent.com.br)<br>Specializing in services and technological solutions for over a decade, they enhance profitability by offering formalization, credit risk, anti-fraud, and transactional solutions | Financial Services | 🇧🇷 São Paulo | 631 | 2007 |
| 27 | [Skyone](https://www.tamtam.ai/c/skyone) (skyone.solutions)<br>A technology solutions provider focused on agility, innovation, and simplifying business processes to help companies evolve and improve customer experiences | Technology, Information and Internet | 🇧🇷 São Paulo | 610 | 2013 |
| 28 | [ATECH – NEGÓCIOS EM TECNOLOGIAS S/A](https://www.tamtam.ai/c/atech-negocios-em-tecnologias-s-a) (atech.com.br)<br>Specializing in critical mission solutions and decision-making technologies with a focus on defense projects, innovative solutions, asset management, logistics, digital security, and smart connections | IT Services and IT Consulting | 🇧🇷 São Paulo | 609 | 2009 |
| 29 | [ISH Tecnologia](https://www.tamtam.ai/c/ish-tecnologia) (ish.com.br)<br>A fast-growing IT firm in Brazil offering cybersecurity, cloud computing, IT infrastructure services, and a Tier III Data Center with research & development for tech solutions | IT Services and IT Consulting | 🇧🇷 Vitória | 596 | 1996 |
| 30 | [Certta](https://www.tamtam.ai/c/certta) (caf.io)<br>Brazilian cybersecurity leader specializing in id/face technology, serving Banks, Fintechs, Ecommerces, and more Committed to making the internet more secure | IT Services and IT Consulting | 🇧🇷 São Paulo | 591 | 2019 |
| 31 | [Soluti Digital](https://www.tamtam.ai/c/soluti-digital) (soluti.com.br)<br>We are an IDTech company offering Digital Identity and Electronic Signature solutions #SolutiDigital | IT Services and IT Consulting | 🇧🇷 Goiânia | 544 | 2007 |
| 32 | [RSI](https://www.tamtam.ai/c/rsi-osasco) (keeggo.com)<br>With 25 years of experience, the company focuses on excellence and innovation It encourages breaking from tradition and embracing the future | IT Services and IT Consulting | 🇧🇷 Osasco | 506 | 1993 |
| 33 | [Asper](https://www.tamtam.ai/c/asper) (asper.tec.br)<br>A rapidly growing cybersecurity company offering managed services to protect organizations' valuable assets, with a team of experts in digital security | IT Services and IT Consulting | 🇧🇷 São Paulo | 474 | 2015 |
| 34 | [Valid Certificadora](https://www.tamtam.ai/c/valid-certificadora) (validcertificadora.com.br)<br>A trusted brand specializing in digital certification, providing high-quality and secure services for individuals and businesses in various sectors | Information Services | 🇧🇷 São Paulo | 466 | 2011 |
| 35 | [Companhia de Processamento de Dados do Estado da Bahia](https://www.tamtam.ai/c/companhia-de-processamento-de-dados-do-estado-da-bahia) (prodeb.ba.gov.rb)<br>Provider of Information Technology and Communication services for the government sector in Bahia, offering data processing, network management, application development, web services, and technical support | IT Services and IT Consulting | 🇧🇷 Salvador | 466 |  |
| 36 | [Soow Sigma](https://www.tamtam.ai/c/soow-sigma) (soow.com.br)<br>With over 30 years of experience, a highly skilled team provides innovative communication solutions nationwide, prioritizing excellent service and product quality | IT Services and IT Consulting | 🇧🇷 Curitiba | 422 | 1985 |
| 37 | [INDT - Instituto de Desenvolvimento Tecnológico](https://www.tamtam.ai/c/indt-instituto-de-desenvolvimento-tecnologico) (indt.org.br)<br>Delivering technology, innovation, and digital transformation through research and development, with over 20 years of experience in the market | Research Services | 🇧🇷 Manaus | 418 | 2001 |
| 38 | [NESS](https://www.tamtam.ai/c/ness) (ness.com.br)<br>Strategic partner specializing in business processes, technology, and innovation Delivering results, managing risks, and driving efficiency for over 25 years | IT Services and IT Consulting | 🇧🇷 São Paulo | 418 | 1991 |
| 39 | [Solor](https://www.tamtam.ai/c/solor) (solor.com.br)<br>Specializing in managed IT infrastructure and cybersecurity services, offering tailored solutions to sustain critical technology operations and optimize client investments with agility and expertise | IT Services and IT Consulting | 🇧🇷 Rio de Janeiro | 394 | 2009 |
| 40 | [Engemon IT](https://www.tamtam.ai/c/engemon-it) (engemon.com.br)<br>Technology integration company offering infrastructure, services, security, and innovation solutions from top global suppliers to boost business performance | IT Services and IT Consulting | 🇧🇷 Alto de Pinheiros/SP | 387 | 2017 |
| 41 | [Safeweb Segurança da Informação](https://www.tamtam.ai/c/safeweb-seguranca-da-informacao) (safeweb.com.br)<br>Leading digital certification provider in Brazil with 27 years of experience, offering secure solutions to 9 million customers through 4,000 service points worldwide | IT Services and IT Consulting | 🇧🇷 Porto Alegre | 373 | 1996 |
| 42 | [Teletex IT Solutions](https://www.tamtam.ai/c/teletex-it-solutions) (teletex.com.br)<br>Solution Integrator in IT Infrastructure domain, delivering value through services and products, aligned with customer needs and technology partners | IT Services and IT Consulting | 🇧🇷 Curitiba | 363 | 1986 |
| 43 | [Tempest Security Intelligence](https://www.tamtam.ai/c/tempest-security-intelligence) (tempest.com.br)<br>Specialized in cybersecurity and digital fraud prevention, offering over 70 solutions to protect businesses of all sizes in various sectors worldwide | Computer and Network Security | 🇧🇷 Recife | 360 | 2000 |
| 44 | [Maminfo](https://www.tamtam.ai/c/maminfo) (maminfo.com.br)<br>Consulting and integrating IT and telecommunications solutions, providing sales, installation, and technical support for network technologies nationwide 24/7 | Telecommunications | 🇧🇷 Campinas | 354 | 2000 |
| 45 | [Claranet Brasil](https://www.tamtam.ai/c/claranet-brasil) (claranet.com)<br>Global technology service provider specializing in cloud, AI, cybersecurity, and digital transformation consulting with scalable, customized solutions for clients worldwide. | IT Services and IT Consulting | 🇧🇷 Barueri | 331 | 1996 |
| 46 | [Netcenter](https://www.tamtam.ai/c/netcenter) (netcenter.com.br)<br>Define, implement, manage, and protect IT assets with a focus on trust and connection | IT Services and IT Consulting | 🇧🇷 Rio de Janeiro | 309 | 1994 |
| 47 | [Grupo NTSec](https://www.tamtam.ai/c/grupo-ntsec) (grupontsec.com.br)<br>A visionary alliance of leading technology companies uniting to provide innovative solutions and exceptional talent for securing clients' future | Computer and Network Security | 🇧🇷 Brasília | 295 | 2007 |
| 48 | [TLD Teledata Tecnologia em Conectividade](https://www.tamtam.ai/c/tld-teledata-tecnologia-em-conectividade) (teledatabrasil.com.br)<br>With over 36 years of experience in telecommunications, contact center, and IT services, we provide innovative solutions for unified communications, omnichannel contact centers, video conferencing, and more | IT Services and IT Consulting | 🇧🇷 Curitiba | 290 | 1987 |
| 49 | [idwall](https://www.tamtam.ai/c/idwall) (idwall.co)<br>Innovating digital identity solutions since 2016, our technology revolutionizes trust relationships with a comprehensive platform for seamless customer identity management | Software Development | 🇧🇷 São Paulo | 232 | 2016 |
| 50 | [Grupo Imagetech](https://www.tamtam.ai/c/grupo-imagetech) (grupoimagetech.com.br)<br>Leader in IT and communication technology, providing intelligent solutions in information security, communication, service management, outsourcing, and software/app development through national and international partnerships | IT Services and IT Consulting | 🇧🇷 Campo Grande | 199 | 2003 |

## How this list is built

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 Brazil

- [The largest companies in Brazil](https://www.tamtam.ai/l/largest-companies-brazil) (16,480)
- [Manufacturers in Brazil](https://www.tamtam.ai/l/manufacturers-brazil) (2,124)
- [Retail chains in Brazil](https://www.tamtam.ai/l/retail-chains-brazil) (1,996)
- [Multinational companies in Brazil](https://www.tamtam.ai/l/multinational-companies-brazil) (1,238)
- [Critical infrastructure operators in Brazil](https://www.tamtam.ai/l/critical-infrastructure-operators-brazil) (1,201)
- [Healthcare providers in Brazil](https://www.tamtam.ai/l/healthcare-providers-brazil) (1,086)
- [Retail companies in Brazil](https://www.tamtam.ai/l/retail-companies-brazil) (1,078)
- [Financial Services companies in Brazil](https://www.tamtam.ai/l/financial-services-companies-brazil) (1,006)
- [Companies with a mobile app in Brazil](https://www.tamtam.ai/l/companies-with-mobile-app-brazil) (927)
- [Financial services firms in Brazil](https://www.tamtam.ai/l/financial-services-firms-brazil) (926)
- [E-commerce companies in Brazil](https://www.tamtam.ai/l/ecommerce-companies-brazil) (802)
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- [Corporate groups and holding companies in Brazil](https://www.tamtam.ai/l/holding-companies-brazil) (720)
- [Food and beverage companies in Brazil](https://www.tamtam.ai/l/food-and-beverage-companies-brazil) (697)
- [Hospitals and Health Care companies in Brazil](https://www.tamtam.ai/l/hospitals-and-health-care-companies-brazil) (664)
- [Distributors and wholesalers in Brazil](https://www.tamtam.ai/l/distributors-and-wholesalers-brazil) (664)
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- [Construction companies in Brazil](https://www.tamtam.ai/l/construction-companies-brazil) (497)

## The same list elsewhere in Brazil

- [Cybersecurity companies in São Paulo State](https://www.tamtam.ai/l/cybersecurity-companies-sao-paulo-state) (34)
- [Cybersecurity companies in São Paulo](https://www.tamtam.ai/l/cybersecurity-companies-sao-paulo) (25)

## The same list elsewhere

- [Cybersecurity companies in the world](https://www.tamtam.ai/l/cybersecurity-companies-in-the-world) (3,776)
- [Cybersecurity companies in Latin America](https://www.tamtam.ai/l/cybersecurity-companies-in-latin-america) (120)

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Source: https://www.tamtam.ai/l/cybersecurity-companies-brazil