# Top 100 cybersecurity companies in the world

Tamtam tracks 3,776 cybersecurity companies worldwide. This list ranks the 100 largest by number of employees on LinkedIn, led by Deloitte, Capgemini and IBM. Their median headcount is 16,891. Half of them were founded in 1992 or later. The most common headquarters are Bengaluru (5), Madrid (4) and Reston (4).

These are large global companies specializing in various aspects of cybersecurity, ranging from IT services to telecommunications and manufacturing. The list includes prominent firms such as Deloitte, a global professional services firm; Capgemini, which focuses on AI, technology, and people; IBM, concentrating on collaboration among technologists; and Microsoft, known for developing software, hardware, and cloud services. Also featured are Orange, a telecommunications operator, and Cisco, specializing in Internet solutions and networking technologies.

The companies on this list are predominantly large enterprises with extensive global footprints. A notable pattern is the strong presence of IT Services and IT Consulting firms, indicating the significant role these companies play in the cybersecurity landscape through their end-to-end solutions and technological expertise.

🌍 World · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Deloitte](https://www.tamtam.ai/c/deloitte) (deloitte.com)<br>Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity | Business Consulting and Services | 🇺🇸 Worldwide | 526,765 | 1845 |
| 2 | [Capgemini](https://www.tamtam.ai/c/capgemini-paris) (capgemini.com)<br>Imagine future organizations, making it real with AI, technology, and people, delivering end-to-end services and solutions across strategy, technology, design, engineering and business operations | IT Services and IT Consulting | 🇫🇷 Paris | 342,989 |  |
| 3 | [IBM](https://www.tamtam.ai/c/ibm) (ibm.com)<br>It focuses on collaboration among technologists, developers, and engineers to improve technology, infrastructure, software, and consulting for better solutions. | IT Services and IT Consulting | 🇺🇸 Armonk | 335,625 |  |
| 4 | [Wipro](https://www.tamtam.ai/c/wipro) (wipro.com)<br>A leading technology services and consulting company offering innovative solutions for digital transformation, with a diverse global workforce and focus on inclusivity | IT Services and IT Consulting | 🇮🇳 Bengaluru | 271,675 |  |
| 5 | [Microsoft](https://www.tamtam.ai/c/microsoft) (microsoft.com)<br>Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences | Software Development | 🇺🇸 Redmond | 233,562 |  |
| 6 | [Orange](https://www.tamtam.ai/c/orange-issy-les-moulineaux) (orange.com)<br>A leading global telecommunications operator offering services to millions of customers and multinational companies across 26 countries | Telecommunications | 🇫🇷 Issy-les-Moulineaux | 146,935 |  |
| 7 | [NTT DATA, Inc.](https://www.tamtam.ai/c/ntt-data-inc) (global.ntt)<br>A global IT services provider offering a wide range of business and technology solutions as it transitions to NTT DATA | IT Services and IT Consulting | 🇯🇵 Tokyo | 140,000 |  |
| 8 | [Honeywell Technologies](https://www.tamtam.ai/c/honeywell-technologies) (honeywell.com)<br>a global automation company that provides services, solutions, and products for building, industrial, and process sectors, focusing on automation to autonomy. | Automation Machinery Manufacturing | 🇺🇸 Charlotte | 134,559 |  |
| 9 | [Cisco](https://www.tamtam.ai/c/cisco) (cisco.com)<br>A technology company founded in 1984, specializing in hardware, software, and services for Internet solutions and networking technologies | Software Development | 🇺🇸 San Jose | 95,899 | 1984 |
| 10 | [Kyndryl](https://www.tamtam.ai/c/kyndryl) (kyndryl.com)<br>A global leader in designing, running, and managing advanced technology infrastructure, focusing on excellence, innovation, and advancing vital systems for human progress | IT Services and IT Consulting | 🇺🇸 New York | 90,000 | 2021 |
| 11 | [Airbus](https://www.tamtam.ai/c/airbus) (airbus.com)<br>Pioneers sustainable aerospace, designs and manufactures commercial aircraft, offers space systems, defense, security, and provides civil and military rotorcraft solutions globally. | Aviation and Aerospace Component Manufacturing | 🇫🇷 Blagnac | 88,309 | 2014 |
| 12 | [Atos](https://www.tamtam.ai/c/atos) (atos.net)<br>Provides tailored AI-powered, end-to-end solutions for all industries, specializing in cybersecurity, cloud, and high-performance computing, fostering a secure, decarbonized future. | IT Services and IT Consulting | 🇫🇷 95877 Bezons | 85,294 |  |
| 13 | [SGS](https://www.tamtam.ai/c/sgs) (sgs.com)<br>Leading global company providing testing, inspection, and certification services to help organizations achieve high standards of quality, compliance, and sustainability. | Professional Services | 🇨🇭 Baar | 74,385 |  |
| 14 | [BT Group](https://www.tamtam.ai/c/bt-group) (bt.com)<br>A global communications services company connecting people through technology to address challenges like the pandemic, climate change, and cyber security | Telecommunications | 🇬🇧 London | 73,712 |  |
| 15 | [Thales](https://www.tamtam.ai/c/thales) (thalesgroup.com)<br>Multinational specializing in cybersecurity, defense, aerospace, digital identity, and secure communications for governments and industries. | Defense and Space Manufacturing | 🇫🇷 Meudon | 65,031 |  |
| 16 | [BAE Systems](https://www.tamtam.ai/c/bae-systems) (baesystems.com)<br>The company provides advanced technology-led defense, aerospace, and security solutions, with a skilled workforce in over 40 countries, focusing on innovation and long-term commitment | Defense and Space Manufacturing | 🇬🇧 London | 55,143 | 1999 |
| 17 | [Broadcom](https://www.tamtam.ai/c/broadcom) (broadcom.com)<br>A leading global infrastructure technology company with a rich history of innovation, collaboration, and engineering excellence spanning over 60 years | Semiconductor Manufacturing | 🇺🇸 Palo Alto | 54,926 |  |
| 18 | [Amentum](https://www.tamtam.ai/c/amentum) (amentum.com)<br>Amentum is a global leader in engineering, project management, and solutions integration, specializing in modernizing critical missions worldwide with speed and confidence | Defense and Space Manufacturing | 🇺🇸 Chantilly | 50,000 |  |
| 19 | [Lumen Technologies](https://www.tamtam.ai/c/lumen-technologies) (lumen.com)<br>The company provides digital connectivity solutions, utilizing their network strength to connect people, data, and applications quickly, securely, and effortlessly | Technology, Information and Internet | 🇺🇸 Monroe | 49,357 |  |
| 20 | [DEKRA](https://www.tamtam.ai/c/dekra) (dekra.com)<br>DEKRA provides expert safety services worldwide, including vehicle inspection, claims services, industrial inspections, training, product certification, and sustainable solutions | Public Safety | 🇩🇪 Stuttgart | 49,000 |  |
| 21 | [NTT DATA](https://www.tamtam.ai/c/ntt-data) (nttdata.com)<br>Providing IT and business consulting, digital transformation, managed services, and industry solutions to clients worldwide for long-term success. | IT Services and IT Consulting | 🇯🇵 Tokyo | 48,385 |  |
| 22 | [Sopra Steria](https://www.tamtam.ai/c/sopra-steria) (soprasteria.com)<br>Offers consulting, digital services, and solutions, assisting large companies and organizations with digital transformation, improving competitiveness through technology and collaboration. | IT Services and IT Consulting | 🇫🇷 Paris | 47,609 |  |
| 23 | [Minsait](https://www.tamtam.ai/c/minsait) (minsait.com)<br>A leading Spanish technological consultant operating globally, leveraging cloud, security, payments, and innovative technology to drive business and societal impact #MoreMinsait | IT Services and IT Consulting | 🇪🇸 Alcobendas | 45,000 | 2016 |
| 24 | [L&T Technology Services](https://www.tamtam.ai/c/l-and-t-technology-services) (ltts.com)<br>Provides engineering and technology services globally, supporting product design, development, and delivery across diverse industries with innovation. | Engineering Services | 🇮🇳 Vadodara | 41,420 |  |
| 25 | [Indra Group](https://www.tamtam.ai/c/indra-group) (indragroup.com)<br>Leading multinational providing defense, space, air traffic management, and mobility solutions alongside information technology services, artificial intelligence, cybersecurity, and advanced digital transformation projects. | Defense and Space Manufacturing | 🇪🇸 Madrid | 39,308 |  |
| 26 | [Leonardo](https://www.tamtam.ai/c/leonardo) (leonardo.com)<br>Defense and security multinational company specializing in aerospace, cybersecurity, military systems, and advanced technology solutions | Defense and Space Manufacturing | 🇮🇹 Rome | 38,521 | 1948 |
| 27 | [Booz Allen Hamilton](https://www.tamtam.ai/c/booz-allen-hamilton) (boozallen.com)<br>Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future | Software Development | 🇺🇸 McLean | 37,244 | 1914 |
| 28 | [Leidos](https://www.tamtam.ai/c/leidos) (leidos.com)<br>Global technology leader providing digital mission innovations and efficient technical services for government and commercial customers through a diverse, flexible work environment. | Defense and Space Manufacturing | 🇺🇸 Reston | 37,171 | 1969 |
| 29 | [SAIC](https://www.tamtam.ai/c/saic) (bit.ly)<br>Advanced technology mission integrator delivering secure high-end solutions in mission IT, enterprise IT, engineering, and professional services for defense, space, and intelligence. | Defense and Space Manufacturing | 🇺🇸 Reston | 36,645 | 1969 |
| 30 | [NTT DATA Europe & Latam](https://www.tamtam.ai/c/ntt-data-europe-and-latam) (nttdata.com)<br>Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future | IT Services and IT Consulting | 🇪🇸 Madrid | 31,932 |  |
| 31 | [Orange Business](https://www.tamtam.ai/c/orange-business) (orange-business.com)<br>Leading European network and digital integrator leveraging expertise in next-generation connectivity, cloud, and cybersecurity solutions for positive impact on customers and planet. | IT Services and IT Consulting | 🇫🇷 Paris | 28,626 |  |
| 32 | [Motorola Solutions](https://www.tamtam.ai/c/motorola-solutions) (motorolasolutions.com)<br>The company builds and connects technologies to enhance public safety collaboration for safer communities, schools, hospitals, and businesses worldwide | Telecommunications | 🇺🇸 Chicago | 28,153 |  |
| 33 | [General Dynamics Information Technology](https://www.tamtam.ai/c/general-dynamics-information-technology) (gdit.com)<br>Provides technology and professional services to U.S. government agencies, specializing in digital modernization, AI, cloud, cyber, and application development worldwide. | IT System Data Services | 🇺🇸 Falls Church | 26,598 |  |
| 34 | [Wipro Ltd. - India](https://www.tamtam.ai/c/wipro-ltd-india) (wipro.com)<br>A leading provider of IT services leveraging technology solutions to enable business transformation, aligning IT strategies with business goals | IT Services and IT Consulting | 🇮🇳 Bengaluru | 24,515 | 1945 |
| 35 | [Unisys](https://www.tamtam.ai/c/unisys) (unisys.com)<br>A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations | IT Services and IT Consulting | 🇺🇸 Blue Bell | 23,358 |  |
| 36 | [ST ENGINEERING AEROSPACE LTD.](https://www.tamtam.ai/c/st-engineering) (stengg.com)<br>application of technology and innovation to solve real-world problems, focusing on defence, engineering, and improving quality of life globally. | Industrial Machinery Manufacturing | 🇸🇬 Singapore | 23,000 | 1967 |
| 37 | [OpenText](https://www.tamtam.ai/c/opentext) (opentext.com)<br>It specializes in Information Management, assisting businesses of all sizes in securely capturing, governing, and exchanging information globally. | Software Development | 🇨🇦 Waterloo | 22,990 | 1991 |
| 38 | [Palo Alto Networks](https://www.tamtam.ai/c/palo-alto-networks) (paloaltonetworks.com)<br>A global cybersecurity leader addressing security challenges through continuous innovation with artificial intelligence, analytics, automation, and orchestration for organizations worldwide | Computer and Network Security | 🇺🇸 Santa Clara | 22,680 | 2005 |
| 39 | [DNV](https://www.tamtam.ai/c/dnv) (dnv.com)<br>A global expert in risk management and assurance, setting industry benchmarks, inspiring solutions, and enabling critical decisions for safety and sustainability | Public Safety | 🇳🇴 Høvik | 22,634 |  |
| 40 | [TIM](https://www.tamtam.ai/c/tim) (gruppotim.it)<br>Provides fixed, mobile, and digital services including Cloud, IoT, and Cybersecurity, building and sharing network infrastructure in Italy and Brazil. | Telecommunications | 🇮🇹 Milan | 22,417 |  |
| 41 | [CACI International Inc](https://www.tamtam.ai/c/caci-international-inc) (caci.com)<br>providing advanced technology and expert services to address complex national security challenges for government and defense sectors | Defense and Space Manufacturing | 🇺🇸 Reston | 22,223 | 1962 |
| 42 | [Parsons Corporation](https://www.tamtam.ai/c/parsons-corporation) (parsons.com)<br>A digitally enabled solutions provider creating future defense, intelligence, and critical infrastructure solutions with an agile and innovative approach | Civil Engineering | 🇺🇸 Chantilly | 20,710 |  |
| 43 | [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 |  |
| 44 | [Applus+](https://www.tamtam.ai/c/applus) (applus.com)<br>A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance | Business Consulting and Services | 🇪🇸 Madrid | 20,046 |  |
| 45 | [Mindtree](https://www.tamtam.ai/c/mindtree) (ltm.com)<br>A technology company facilitating fast-tracked evolution for businesses with a focus on innovation and collaboration for a future-forward approach | IT Services and IT Consulting | 🇮🇳 Bengaluru | 19,600 |  |
| 46 | [TÜV SÜD](https://www.tamtam.ai/c/tuv-sud) (tuvsud.com)<br>Experts provide testing, certification, auditing, and advisory services across various industries, ensuring safety, security, and sustainability for technological advancements and market access. | Public Safety | 🇩🇪 Munich | 18,205 | 1866 |
| 47 | [Peraton](https://www.tamtam.ai/c/peraton) (peraton.com)<br>A company at the forefront of solving global challenges with innovative solutions, prioritizing safety and security through fresh perspectives and talent | Technology, Information and Internet | 🇺🇸 Reston | 18,000 | 2017 |
| 48 | [Broadcom Software](https://www.tamtam.ai/c/broadcom-software) (broadcom.com)<br>Global software leader optimizing and protecting complex hybrid environments for multinational companies with industry-leading business-critical software, enabling scalability, agility, and security | Software Development | 🇺🇸 San Jose | 17,981 |  |
| 49 | [Reply](https://www.tamtam.ai/c/reply) (reply.com)<br>Specializing in innovative solutions using AI, big data, and digital media, this company delivers consulting and digital services across various sectors globally | IT Services and IT Consulting | 🇮🇹 Turin | 17,188 | 1996 |
| 50 | [Tata Communications](https://www.tamtam.ai/c/tata-communications) (tatacommunications.com)<br>Provides global digital connectivity and secure enterprise solutions, enabling digital transformation for businesses including Fortune 500 companies worldwide. | Telecommunications | 🇮🇳 Mumbai | 16,891 | 2002 |
| 51 | [Fortinet](https://www.tamtam.ai/c/fortinet) (fortinet.com)<br>Fortinet enables trust in the digital world by protecting people, devices, and data for enterprises, service providers, and government organizations | Computer and Network Security | 🇺🇸 Sunnyvale | 16,304 | 2000 |
| 52 | [Burns & McDonnell](https://www.tamtam.ai/c/burns-and-mcdonnell) (burnsmcd.com)<br>Engineering, construction, architecture, planning, and community engagement with a strong ownership mentality and commitment to client success and safety. | Construction | 🇺🇸 Kansas City | 16,200 |  |
| 53 | [Keysight Technologies](https://www.tamtam.ai/c/keysight-technologies) (keysight.com)<br>Empowers innovators to explore, design, and bring world-changing technologies to life by solving design, emulation, and test challenges to help create the best product experiences | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Santa Rosa | 13,893 |  |
| 54 | [Protiviti](https://www.tamtam.ai/c/protiviti) (protiviti.com)<br>Global consulting firm offering expertise in finance, technology, operations, data, digital, legal, HR, risk, and internal audit to help clients navigate future challenges | Business Consulting and Services | 🇺🇸 Menlo Park | 13,479 | 2002 |
| 55 | [MultiChoice Group](https://www.tamtam.ai/c/multichoice-group) (multichoice.com)<br>Provides entertainment platforms and content security services, delivering African storytelling to over 19 million people across 50 countries. | Broadcast Media Production and Distribution | 🇿🇦 Randburg | 13,144 | 1995 |
| 56 | [Giesecke+Devrient](https://www.tamtam.ai/c/giesecke-devrient) (gi-de.com)<br>Global SecurityTech company providing digital security, financial platforms, and currency technology to enhance trust and safety worldwide. | IT Services and IT Consulting | 🇩🇪 Munich | 13,000 | 1852 |
| 57 | [Symantec](https://www.tamtam.ai/c/symantec) (broadcom.com)<br>It offers comprehensive cybersecurity solutions for Endpoint, Network, Data, and Cloud security, catering to both individuals and enterprises. | Software Development | 🇺🇸 San Jose | 12,852 | 1982 |
| 58 | [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 |
| 59 | [IDEMIA](https://www.tamtam.ai/c/idemia) (idemia.com)<br>Provides payment, connectivity, cybersecurity, and biometric solutions to financial institutions, mobile operators, and public security organizations globally. | Software Development | 🇫🇷 Courbevoie | 12,233 |  |
| 60 | [Bechtle Schweiz AG](https://www.tamtam.ai/c/bechtle-schweiz-ag) (bechtle.com)<br>Leading IT service provider for SMEs, large customers, and public institutions, offering consulting, infrastructure, cloud, services, and software solutions throughout the entire IT life cycle. | IT Services and IT Consulting | 🇨🇭 Mägenwil | 12,000 | 1983 |
| 61 | [Engineering Group](https://www.tamtam.ai/c/engineering-group) (eng.it)<br>Leading digital transformation company with global presence, specializing in innovation, proprietary solutions, R&D, and diverse market expertise. | IT Services and IT Consulting | 🇮🇹 Rome | 11,815 | 1980 |
| 62 | [PwC Deutschland](https://www.tamtam.ai/c/pwc-deutschland) (pwc.de)<br>A leading auditing and consulting firm in Germany, offering services worldwide with expertise in assurance, tax, legal, deals, and strategy advisory | Business Consulting and Services | 🇩🇪 Frankfurt | 11,566 |  |
| 63 | [Elm Company](https://www.tamtam.ai/c/elm-company) (elm.sa)<br>Provider of secure e-services, customized IT solutions, and governmental support to public and private sectors in Saudi Arabia. | IT Services and IT Consulting | 🇸🇦 Riyadh | 10,946 | 1986 |
| 64 | [IBM INDIA](https://www.tamtam.ai/c/ibm-india) (ibm.com)<br>A leading IT company with facilities across major cities in India, offering technology solutions and services to businesses and industries | Computer Hardware Manufacturing | 🇮🇳 Chandigarh | 10,908 | 1992 |
| 65 | [Datadog](https://www.tamtam.ai/c/datadog) (datadoghq.com)<br>Provider of essential monitoring platform for cloud applications, consolidating data from various sources to ensure optimal performance and user experience for DevOps teams | Software Development | 🇺🇸 New York | 10,888 | 2010 |
| 66 | [Eviden](https://www.tamtam.ai/c/eviden) (eviden.com)<br>Eviden is a global leader in digital transformation, offering expertise in digital, cloud, data, advanced computing, and security solutions to industries worldwide | IT Services and IT Consulting | 🇫🇷 Bezons | 10,793 |  |
| 67 | [T-Systems International](https://www.tamtam.ai/c/t-systems-international) (t-systems.com)<br>Provides end-to-end IT solutions, cloud migration, and industry-specific digital transformation services with strong security and global presence. | IT Services and IT Consulting | 🇩🇪 Frankfurt | 10,768 | 2000 |
| 68 | [Akamai Technologies](https://www.tamtam.ai/c/akamai-technologies) (akamai.com)<br>A global leader in internet infrastructure, Akamai powers and protects online experiences for billions of users daily through innovative solutions | Technology, Information and Internet | 🇺🇸 Cambridge | 10,647 |  |
| 69 | [MANTECH](https://www.tamtam.ai/c/mantech) (mantech.com)<br>A dedicated company providing technology services to support national security, military welfare, community protection, and healthcare advancement for over 50 years | IT System Data Services | 🇺🇸 Herndon | 10,459 | 1968 |
| 70 | [NETWORK-SECURITY-SOLUTIONS](https://www.tamtam.ai/c/network-security-solutions) (n-security.com)<br>Specializing in managing Linux/Unix servers and large network environments with a focus on customized solutions, quality, and technological innovation | Computer and Network Security | 🇵🇱 Poznań | 10,400 | 2010 |
| 71 | [KPMG Canada](https://www.tamtam.ai/c/kpmg-canada) (kpmg.com)<br>Providing audit, tax, and advisory services to public, private, nonprofit, and public sector organizations across Canada with professionalism. | Financial Services | 🇨🇦 Toronto | 10,017 |  |
| 72 | [IBM India Pvt. Ltd.](https://www.tamtam.ai/c/ibm-india-pvt-ltd) (ibm.com)<br>A global leader in technology services and solutions, with a strong presence and significant investments in India's IT industry | Market Research | 🇮🇳 Gurugram | 9,902 | 1911 |
| 73 | [SPIE France](https://www.tamtam.ai/c/spie-france) (spie.fr)<br>Global actor in energy, digital, and industrial transitions, offering concrete solutions for decarbonizing buildings, industries, and territories through various technical services. | IT Services and IT Consulting | 🇫🇷 Cergy-Pontoise | 9,833 |  |
| 74 | [General Dynamics Mission Systems](https://www.tamtam.ai/c/general-dynamics-mission-systems) (gdmissionsystems.com)<br>A mission-critical C4ISR solutions provider developing technology for communication, data sharing, mine detection, and more across various domains | Defense and Space Manufacturing | 🇺🇸 Chantilly | 9,815 | 1952 |
| 75 | [Accenture Federal Services](https://www.tamtam.ai/c/accenture-federal-services) (accenture.com)<br>The company brings advanced R&D, latest technologies, and human-centered design to the federal government to create lasting value and drive positive change | IT Services and IT Consulting | 🇺🇸 Arlington | 9,719 |  |
| 76 | [Rohde & Schwarz](https://www.tamtam.ai/c/rohde-and-schwarz) (rohde-schwarz.com)<br>Technology group creates innovations, empowers industrial, regulatory, and military customers with test, measurement, and cybersecurity solutions, pushing boundaries in AI, 6G, cloud. | Telecommunications | 🇩🇪 Munich | 9,600 | 1933 |
| 77 | [IBM India Private Limited](https://www.tamtam.ai/c/ibm-india-private-limited) (ibm.com)<br>A global technology and consulting company, focused on cloud platforms and cognitive solutions, with a history of innovation and leadership in the industry | IT Services and IT Consulting | 🇮🇳 Bengaluru | 9,508 |  |
| 78 | [Comcast Business](https://www.tamtam.ai/c/comcast-business) (business.comcast.com)<br>A technology solutions provider offering connectivity, networking, cybersecurity, and communications solutions to businesses of all sizes, with a focus on driving innovation and growth | Telecommunications | 🇺🇸 Philadelphia | 9,292 |  |
| 79 | [MITRE](https://www.tamtam.ai/c/mitre) (mitre.org)<br>A non-profit corporation, operating federally funded R&D centers, dedicated to solving national challenges in defense, cybersecurity, healthcare, homeland security, and transportation | Research Services | 🇺🇸 McLean | 9,164 | 1958 |
| 80 | [Juniper Networks](https://www.tamtam.ai/c/juniper-networks) (juniper.net)<br>Develops intelligent, agile, and secure networking products and solutions serving global service providers, enterprises, and government organizations worldwide. | Software Development | 🇺🇸 Sunnyvale | 9,059 | 1996 |
| 81 | [Zscaler](https://www.tamtam.ai/c/zscaler) (zscaler.com)<br>Leading organization enabling secure network and application transformation for mobile and cloud-first world, offering fast, secure, cloud-delivered services globally for enhanced cybersecurity | Computer and Network Security | 🇺🇸 San Jose | 8,865 | 2007 |
| 82 | [Splunk](https://www.tamtam.ai/c/splunk) (splunk.com)<br>Providing organizations with a unified security and observability platform to ensure operational resilience in the face of digital disruptions | Software Development | 🇺🇸 San Francisco | 8,820 |  |
| 83 | [SCC](https://www.tamtam.ai/c/scc) (scc.com)<br>SCC is a leading IT group in Europe, providing limitless IT solutions, cyber security services, digital workplace solutions, and hybrid infrastructure services | IT Services and IT Consulting | 🇬🇧 Birmingham | 8,687 | 1975 |
| 84 | [YASH Technologies](https://www.tamtam.ai/c/yash-technologies) (yash.com)<br>Consulting-led digital transformation partner offering technology, advisory, and outsourcing services to optimize client performance and revenue growth globally. | IT Services and IT Consulting | 🇺🇸 East Moline | 8,670 | 1996 |
| 85 | [Kyndryl India](https://www.tamtam.ai/c/kyndryl-india) (kyndryl.com)<br>A global team of experts working to design, manage, and advance technology infrastructure for continuous growth and human progress | IT Services and IT Consulting | 🇮🇳 Bengaluru East | 8,643 | 2021 |
| 86 | [Check Point Software](https://www.tamtam.ai/c/check-point-software) (checkpoint.com)<br>Leading provider of cyber security solutions globally, protecting over 100,000 customers with industry-leading malware, ransomware, and threat prevention Specializes in multi-level security architecture | Computer and Network Security | 🇺🇸 Redwood City | 8,546 | 1993 |
| 87 | [Thales Cyber and Digital](https://www.tamtam.ai/c/thales-cyber-and-digital) (thalesgroup.com)<br>Design and deliver digital identification, data protection products, software, and services for secure digital services globally. | IT Services and IT Consulting | 🇫🇷 Meudon | 8,199 | 2006 |
| 88 | [Vodafone Business](https://www.tamtam.ai/c/vodafone-business) (vodafone.com)<br>Providing mobile, fixed, unified communications, IoT, cloud, and security services to businesses globally, regionally, and locally. | Telecommunications | 🇬🇧 London | 8,100 |  |
| 89 | [TrendAI](https://www.tamtam.ai/c/trendai) (trendmicro.com)<br>Global cybersecurity company providing AI-powered protection and risk management for enterprises, governments, and consumers across diverse digital environments. | Computer and Network Security | 🇯🇵 Tokyo | 8,060 |  |
| 90 | [Cohesity](https://www.tamtam.ai/c/cohesity) (cohesity.com)<br>The company offers data protection and insights through a hyper-scale platform, AI-powered intelligence, zero trust security, third-party extensibility, and high customer satisfaction | Software Development | 🇺🇸 Santa Clara | 7,801 | 2013 |
| 91 | [Okta](https://www.tamtam.ai/c/okta) (okta.com)<br>A platform that prioritizes identity management by offering neutrality, power, and flexibility, tailored to various industries, use cases, and support levels | Software Development | 🇺🇸 San Francisco | 7,522 | 2009 |
| 92 | [Cloudflare](https://www.tamtam.ai/c/cloudflare) (cloudflare.com)<br>The company is a leading connectivity cloud provider, empowering organizations to enhance speed and security while reducing complexity and cost | Computer and Network Security | 🇺🇸 San Francisco | 7,489 | 2009 |
| 93 | [Veeam Software](https://www.tamtam.ai/c/veeam-software) (veeam.com)<br>Provides data backup, recovery, security, and intelligence solutions ensuring business continuity and data availability across hybrid cloud environments worldwide. | Software Development | 🇺🇸 Seattle | 7,308 | 2006 |
| 94 | [NRI Group](https://www.tamtam.ai/c/nri-group) (nri.com)<br>Providing insight-driven research, consulting, and managed services including IT solutions, cybersecurity, and digital marketing to enhance client performance. | IT Services and IT Consulting | 🇯🇵 Chiyoda-ku | 7,257 | 1965 |
| 95 | [HackerOne](https://www.tamtam.ai/c/hackerone) (hackerone.com)<br>A global leader in human-powered security, leveraging human ingenuity and AI to find critical security flaws and reduce threat exposure | Computer and Network Security | 🇺🇸 San Francisco | 7,165 | 2012 |
| 96 | [Viasat](https://www.tamtam.ai/c/viasat) (viasat.com)<br>Global communications company providing connectivity solutions for consumers, businesses, governments, and militaries worldwide, ensuring internet access in remote locations and on-the-go | Telecommunications | 🇺🇸 Carlsbad | 6,809 | 1986 |
| 97 | [Ziff Davis](https://www.tamtam.ai/c/ziff-davis) (ziffdavis.com)<br>Digital media and internet company with brands in technology, shopping, gaming, entertainment, health, connectivity, cybersecurity, and marketing technology. | Technology, Information and Media | 🇺🇸 New York | 6,688 |  |
| 98 | [NTT](https://www.tamtam.ai/c/ntt-chiyoda-ku) (global.ntt)<br>Global technology company offering mobile, infrastructure, consulting, and cloud services with deep industry expertise, serving Fortune Global 100 companies and millions of clients worldwide | IT Services and IT Consulting | 🇯🇵 Chiyoda-ku | 6,355 | 1985 |
| 99 | [Happiest Minds Technologies](https://www.tamtam.ai/c/happiest-minds-technologies) (happiestminds.com)<br>This company specializes in digital transformation through innovative technologies like AI, blockchain, IoT, cloud, and robotics for various industries globally | IT Services and IT Consulting | 🇮🇳 Bengaluru | 6,261 | 2011 |
| 100 | [Accenture España](https://www.tamtam.ai/c/accenture-espana) (accenture.com)<br>A global professional services company helping businesses and governments with digital transformation, cloud technology, data analytics, and industry expertise to drive tangible outcomes | Business Consulting and Services | 🇪🇸 Madrid | 6,208 |  |

## 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 the world

- [The largest companies in the world](https://www.tamtam.ai/l/largest-companies-in-the-world) (415,122)
- [Multinational companies in the world](https://www.tamtam.ai/l/multinational-companies-in-the-world) (74,925)
- [Manufacturers in the world](https://www.tamtam.ai/l/manufacturers-in-the-world) (39,579)
- [Retail chains in the world](https://www.tamtam.ai/l/retail-chains-in-the-world) (35,499)
- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Financial services firms in the world](https://www.tamtam.ai/l/financial-services-firms-in-the-world) (26,817)
- [Professional services firms in the world](https://www.tamtam.ai/l/professional-services-firms-in-the-world) (24,737)
- [Education providers in the world](https://www.tamtam.ai/l/education-companies-in-the-world) (23,937)
- [IT Services and IT Consulting companies in the world](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-in-the-world) (23,571)
- [Critical infrastructure operators in the world](https://www.tamtam.ai/l/critical-infrastructure-operators-in-the-world) (23,312)
- [SaaS companies in the world](https://www.tamtam.ai/l/saas-companies-in-the-world) (22,459)
- [IT services companies in the world](https://www.tamtam.ai/l/it-services-companies-in-the-world) (20,934)
- [Software Development companies in the world](https://www.tamtam.ai/l/software-development-companies-in-the-world) (20,534)
- [Hardware manufacturers in the world](https://www.tamtam.ai/l/hardware-companies-in-the-world) (20,159)
- [Financial Services companies in the world](https://www.tamtam.ai/l/financial-services-companies-in-the-world) (19,958)
- [Companies with a mobile app in the world](https://www.tamtam.ai/l/companies-with-mobile-app-in-the-world) (18,922)
- [Public sector organisations in the world](https://www.tamtam.ai/l/public-sector-organisations-in-the-world) (18,493)
- [Healthcare providers in the world](https://www.tamtam.ai/l/healthcare-providers-in-the-world) (16,037)
- [Consulting firms in the world](https://www.tamtam.ai/l/consulting-firms-in-the-world) (16,009)
- [Family-owned companies in the world](https://www.tamtam.ai/l/family-owned-companies-in-the-world) (14,667)
- [Distributors and wholesalers in the world](https://www.tamtam.ai/l/distributors-and-wholesalers-in-the-world) (13,470)
- [Hospitals and Health Care companies in the world](https://www.tamtam.ai/l/hospitals-and-health-care-companies-in-the-world) (12,916)
- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,864)
- [E-commerce companies in the world](https://www.tamtam.ai/l/ecommerce-companies-in-the-world) (12,013)

## The same list elsewhere

- [Cybersecurity companies in Europe](https://www.tamtam.ai/l/cybersecurity-companies-in-europe) (2,197)
- [Cybersecurity companies in the United States](https://www.tamtam.ai/l/cybersecurity-companies-united-states) (1,007)
- [Cybersecurity companies in France](https://www.tamtam.ai/l/cybersecurity-companies-france) (958)
- [Cybersecurity companies in the United Kingdom](https://www.tamtam.ai/l/cybersecurity-companies-united-kingdom) (549)
- [Cybersecurity companies in Asia](https://www.tamtam.ai/l/cybersecurity-companies-in-asia) (235)
- [Cybersecurity companies in India](https://www.tamtam.ai/l/cybersecurity-companies-india) (121)
- [Cybersecurity companies in Switzerland](https://www.tamtam.ai/l/cybersecurity-companies-switzerland) (120)
- [Cybersecurity companies in Latin America](https://www.tamtam.ai/l/cybersecurity-companies-in-latin-america) (120)
- [Cybersecurity companies in Germany](https://www.tamtam.ai/l/cybersecurity-companies-germany) (113)
- [Cybersecurity companies in the Middle East](https://www.tamtam.ai/l/cybersecurity-companies-in-the-middle-east) (97)
- [Cybersecurity companies in Spain](https://www.tamtam.ai/l/cybersecurity-companies-spain) (77)
- [Cybersecurity companies in Italy](https://www.tamtam.ai/l/cybersecurity-companies-italy) (73)
- [Cybersecurity companies in Belgium](https://www.tamtam.ai/l/cybersecurity-companies-belgium) (69)
- [Cybersecurity companies in Brazil](https://www.tamtam.ai/l/cybersecurity-companies-brazil) (58)
- [Cybersecurity companies in the Netherlands](https://www.tamtam.ai/l/cybersecurity-companies-netherlands) (55)
- [Cybersecurity companies in Canada](https://www.tamtam.ai/l/cybersecurity-companies-canada) (52)
- [Cybersecurity companies in Africa](https://www.tamtam.ai/l/cybersecurity-companies-in-africa) (43)
- [Cybersecurity companies in the United Arab Emirates](https://www.tamtam.ai/l/cybersecurity-companies-united-arab-emirates) (29)
- [Cybersecurity companies in Turkey](https://www.tamtam.ai/l/cybersecurity-companies-turkey) (25)

---

Source: https://www.tamtam.ai/l/cybersecurity-companies-in-the-world