The cybersecurity companies in São Paulo are primarily large to mid-sized firms specializing in IT services and consulting, with a strong focus on digital transformation and security solutions. Companies like Stefanini Brasil, with over 12,000 employees, offer global IT services including consulting and BPO. Valid provides secure identification services, while Certisign focuses on digital identification and security solutions to reduce fraud. unico IDtech specializes in digital identity solutions.
A notable pattern among these companies is their common headquarters in São Paulo, indicating a centralized hub for cybersecurity and IT services in Brazil. Many were founded in the late 20th and early 21st centuries, reflecting the growth of the IT sector during those periods. T-Systems do Brasil and NTT DATA BRASIL are also significant players, offering integrated IT and communication solutions.
| # | 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 |
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 | |||
| 9 |
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 | |||
| 10 |
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 | |||
| 11 |
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 | |||
| 12 |
RTMrtm.net.br
Integrator hub in Brazilian financial market, providing secure technological solutions to over 700 institutions, connecting key players in the industry |
660 | |||
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| 13 |
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 | |||
| 14 |
Skyoneskyone.solutions
A technology solutions provider focused on agility, innovation, and simplifying business processes to help companies evolve and improve customer experiences |
610 | |||
| 15 |
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 | |||
| 16 | 591 | ||||
| 17 |
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 | |||
| 18 |
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 | |||
| 19 |
NESSness.com.br
Strategic partner specializing in business processes, technology, and innovation Delivering results, managing risks, and driving efficiency for over 25 years |
418 | |||
| 20 | 232 | ||||
| 21 |
Redbelt Securityredbelt.com.br
Specialized cybersecurity consultancy integrating people, systems, services, and products to enhance information security and boost confidence in business services |
178 | |||
| 22 |
Vitaravitara.com.br
An innovative organization specializing in Information Security consulting, implementing solutions from top global security product manufacturers and Open Source tools |
167 | |||
| 23 |
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 | |||
| 24 |
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 | |||
| 25 |
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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