# Top 25 cybersecurity companies in São Paulo

Tamtam tracks 25 cybersecurity companies headquartered in São Paulo. This list ranks all of them by number of employees on LinkedIn, led by Stefanini Brasil, Valid and Stefanini LATAM. Their median headcount is 631. Half of them were founded in 2007 or later.

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.

🇧🇷 São Paulo · 25 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [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 |
| 2 | [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 |
| 3 | [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 |
| 4 | [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 |
| 5 | [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 |  |
| 6 | [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 |  |
| 7 | [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 |
| 8 | [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 |
| 9 | [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 |
| 10 | [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 |
| 11 | [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 |
| 12 | [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 |
| 13 | [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 |
| 14 | [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 |
| 15 | [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 |
| 16 | [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 |
| 17 | [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 |
| 18 | [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 |
| 19 | [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 |
| 20 | [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 |
| 21 | [Redbelt Security](https://www.tamtam.ai/c/redbelt-security) (redbelt.com.br)<br>Specialized cybersecurity consultancy integrating people, systems, services, and products to enhance information security and boost confidence in business services | IT Services and IT Consulting | 🇧🇷 São Paulo | 178 | 2009 |
| 22 | [Vitara](https://www.tamtam.ai/c/vitara) (vitara.com.br)<br>An innovative organization specializing in Information Security consulting, implementing solutions from top global security product manufacturers and Open Source tools | IT Services and IT Consulting | 🇧🇷 São Paulo | 167 | 2009 |
| 23 | [Netconn](https://www.tamtam.ai/c/netconn) (netconn.com.br)<br>Established in 1998, the company offers tailored solutions to reduce business risks, protect information assets, address cyber threats, and ensure data protection compliance | Computer and Network Security | 🇧🇷 São Paulo | 97 | 1998 |
| 24 | [BERGHEM - Smart Information Security](https://www.tamtam.ai/c/berghem-smart-information-security) (berghem.com.br)<br>A long-standing company specializing in cybersecurity services such as ethical hacking tests, secure development, and payment security assessments for businesses | Computer and Network Security | 🇧🇷 São Paulo | 43 | 2001 |
| 25 | [AllowMe](https://www.tamtam.ai/c/allowme) (allowme.cloud)<br>This company helps businesses protect their customers' digital identities through a comprehensive fraud prevention platform, becoming the most trusted solution in the market | IT Services and IT Consulting | 🇧🇷 São Paulo | 8 | 2019 |

## 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 São Paulo

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## The same list elsewhere in Brazil

- [Cybersecurity companies in Brazil](https://www.tamtam.ai/l/cybersecurity-companies-brazil) (58)
- [Cybersecurity companies in São Paulo State](https://www.tamtam.ai/l/cybersecurity-companies-sao-paulo-state) (34)

## 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-sao-paulo