The cybersecurity companies in São Paulo State are predominantly large IT services and business consulting firms. Many of these companies offer a broad range of technology solutions, with a strong focus on digital transformation, cloud services, and secure identification.
Key players include Stefanini Brasil, a global IT services provider; Valid, specializing in secure identification; T-Systems do Brasil, offering integrated IT & Communications Technology; and Certisign, focused on digital identification and security solutions. A notable pattern is the concentration of headquarters in São Paulo city, with a few significant companies based in Barueri.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Stefanini Brasilstefanini.com
A global IT services provider offering consulting, integration, solution development, BPO, outsourcing, and technology-based business solutions in over 35 countries |
12,265 | |||
| 2 | 3,613 | ||||
| 3 |
Stefanini LATAMstefanini.com
Provides integrated digital transformation services including consulting, AI, cybersecurity, banking, manufacturing, and digital marketing across 41 countries. |
2,651 | |||
| 4 |
Stefanini EMEAstefanini.com
Global digital transformation accelerator with 35+ years experience offering diverse technology solutions and IT outsourcing services in 16 European countries |
2,420 | |||
| 5 |
Stefanini North America and APACstefanini.com
A multinational company offering innovative technological solutions to help clients transform their business through digital innovation and co-creation for a better future |
1,999 | |||
| 6 |
T-Systems do Brasilt-systems.com
Global leader in IT & Communications Technology, offering integrated solutions in Digital, SAP, Cloud, Infrastructure, and Security with focus on innovation and customer satisfaction |
1,528 | |||
| 7 |
Globalweb Corpglobalweb.com.br
Cloud services provider offering ERP, CRM, security, data storage, and infrastructure solutions tailored to enhance business competitiveness with modern technology services |
1,443 | |||
| 8 |
Nava | Tech for Businessnava.com.br
A technology company passionate about people and innovation, empowering employees to create solutions for leading companies to positively impact the world |
1,374 | |||
| 9 |
SEK Security Ecosystem Knowledgesek.io
Specialized consultancy providing continuous risk analysis and control services for large companies and organizations, with customized solutions tailored to each client's unique profile |
1,067 | |||
| 10 |
NTT DATA BRASILnttdata.com
Global IT services arm of NTT with over 75,000 employees in 40+ countries Leading provider of innovative IT solutions benefiting businesses and organizations |
921 | |||
| 11 |
unico IDtechunico.io
Specializing in digital identity, we create solutions to simplify lives and boost businesses for millions of individuals and top firms in the country |
871 | |||
| 12 |
Service IT.service.com.br
Specializing in IT solutions and services such as outsourcing, cybersecurity, and consultation Providing monitoring and management through own operation centers in multiple countries |
751 | |||
| 13 |
Delfiadelfia.tech
A Brazilian multinational specializing in digital curation, offering continuous training to curators to identify and implement innovative solutions for digital success |
694 | |||
| 14 |
Certisigncertisign.com.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 |
668 | |||
| 15 |
RTMrtm.net.br
Integrator hub in Brazilian financial market, providing secure technological solutions to over 700 institutions, connecting key players in the industry |
660 | |||
| 16 |
HS Preventhsprevent.com.br
Specializing in services and technological solutions for over a decade, they enhance profitability by offering formalization, credit risk, anti-fraud, and transactional solutions |
631 | |||
| 17 |
Skyoneskyone.solutions
A technology solutions provider focused on agility, innovation, and simplifying business processes to help companies evolve and improve customer experiences |
610 | |||
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. | |||||
| 18 |
ATECH – NEGÓCIOS EM TECNOLOGIAS S/Aatech.com.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 |
609 | |||
| 19 | 591 | ||||
| 20 |
RSIkeeggo.com
With 25 years of experience, the company focuses on excellence and innovation It encourages breaking from tradition and embracing the future |
506 | |||
| 21 |
Asperasper.tec.br
A rapidly growing cybersecurity company offering managed services to protect organizations' valuable assets, with a team of experts in digital security |
474 | |||
| 22 |
Valid Certificadoravalidcertificadora.com.br
A trusted brand specializing in digital certification, providing high-quality and secure services for individuals and businesses in various sectors |
466 | |||
| 23 |
NESSness.com.br
Strategic partner specializing in business processes, technology, and innovation Delivering results, managing risks, and driving efficiency for over 25 years |
418 | |||
| 24 |
Engemon ITengemon.com.br
Technology integration company offering infrastructure, services, security, and innovation solutions from top global suppliers to boost business performance |
387 | |||
| 25 |
Maminfomaminfo.com.br
Consulting and integrating IT and telecommunications solutions, providing sales, installation, and technical support for network technologies nationwide 24/7 |
354 | |||
| 26 |
Claranet Brasilclaranet.com
Global technology service provider specializing in cloud, AI, cybersecurity, and digital transformation consulting with scalable, customized solutions for clients worldwide. |
331 | |||
| 27 | 232 | ||||
| 28 |
Motorola Solutions Brasilmotorolasolutions.com
Specializing in creating and connecting technologies for enhanced security, facilitating collaboration between public safety agents and businesses for proactive safety measures in various settings |
186 | |||
| 29 |
Redbelt Securityredbelt.com.br
Specialized cybersecurity consultancy integrating people, systems, services, and products to enhance information security and boost confidence in business services |
178 | |||
| 30 |
Vitaravitara.com.br
An innovative organization specializing in Information Security consulting, implementing solutions from top global security product manufacturers and Open Source tools |
167 | |||
| 31 |
Netconnnetconn.com.br
Established in 1998, the company offers tailored solutions to reduce business risks, protect information assets, address cyber threats, and ensure data protection compliance |
97 | |||
| 32 |
BERGHEM - Smart Information Securityberghem.com.br
A long-standing company specializing in cybersecurity services such as ethical hacking tests, secure development, and payment security assessments for businesses |
43 | |||
| 33 |
Tellius Cibersegurançaachilleas.com.br
Specializing in cybersecurity and digital fraud prevention, this company develops innovative solutions with advanced technology and expertise to protect digital assets |
9 | |||
| 34 |
AllowMeallowme.cloud
This company helps businesses protect their customers' digital identities through a comprehensive fraud prevention platform, becoming the most trusted solution in the market |
8 | |||
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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.
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