Cybersecurity Companies in Mississauga

Canada’s tech sector in Mississauga is going through significant changes, expanding by 138% in the past five years and growing much faster than almost all other cities there. The city of Mississauga is now inviting more investors, innovators, and employees to join its information technology and cybersecurity industries, thanks to its tech industry and position in the Toronto-Waterloo Innovation Corridor. Hence, organisations are looking for top cybersecurity companies in Mississauga to secure their data, follow the necessary guidelines, and carry on their business as usual in the face of growing threats. Present Cybersecurity Position in Mississauga Cybersecurity is especially important now because, in the winter of 2024, a major ransomware attack disrupted a leading Canadian healthcare network, compromising patient care and exposing sensitive information. Such incidents do not occur only once. According to the 2025 Canadian data, more than two-thirds (86.5%) of organisations had suffered a security incident, with misconfigurations of Internet of Things (IoT) and cloud services being the primary cause (82%). Among all cybercrimes, ransomware remains the most common and harmful, with the danger increasing in tandem with advancements in AI and quantum computing. The growing demand for better cyber defense because of technology, rules, and security reasons is expected to cause cybersecurity companies in the Mississauga to grow by 10.99% each year, reaching $12.96 million by 2025. The development of cybersecurity in Canada is mainly due to the booming companies in Mississauga, attracting both national and local firms. 1. QualySec Technologies As one of the top cybersecurity companies in Mississauga, QualySec Technologies is recognised for its comprehensive penetration testing and vulnerability assessment services, designed for websites, smartphone apps, cloud solutions, internet-connected devices, and artificial intelligence-powered applications.  QualySec has established a strong reputation by utilising automated tools and expert review to provide clients with in-depth inspections and valuable insights. Using a hacker’s technique, they can find weaknesses that typical scans could overlook. Seasoned team members at QualySec make sure that the reports provided are detailed and easy for anyone to understand. They also offer support in fixing issues, meeting compliance standards, and boosting overall security.  Because QualySec has helped secure more than 450 services in 18+ countries and has experienced no data breaches, it provides reliable cybersecurity services to numerous companies in fintech, healthcare, SaaS, and e-commerce, making it a valuable choice for businesses seeking professional, secure services in 2025. 2. eSentire Versatile MDR solutions by eSentire include continuous threat checking as well as handling attacks after they are identified. Utilising their own AI and global security team, they monitor the finance, healthcare, and legal sectors to identify and mitigate cyber threats that could compromise operations. 3. Herjavec Group The firm offers advice on security issues, assumes security responsibilities for subscribers, and assists with responding to incidents. Among their services are risk identification, cloud security, and identity management. The company collaborates with numerous organisations in North America, assisting with compliance and digital transformation by leveraging threat intelligence and proactively blocking threats. 4. ISA Cybersecurity ISA Cybersecurity aids Canadian organisations by handling their security, safeguarding what they do, and ensuring they adhere to required policies. Examples of what they offer are security operations center services, vulnerability management, and digital forensics. They direct clients within different industries to follow new and updated regulations about privacy and security. 5. CGI They provide various cybersecurity-related services such as consulting, performing risk checks, and handling defense. For years, they have worked in the fields of government, healthcare, and finance. CGI’s office in Mississauga gives clients the chance to get local support for their needs in cloud security, threat intelligence, and incident response. 6. Stratejm Stratejm offers cloud-native security-as-a-service, primarily focusing on managed detection, response, and compliance. Because the platform connects to your IT network, it enables you to monitor threats in real time. It is designed for businesses of all sizes, with a particular focus on protecting them through automation and scalability. 7. Scalar Decisions (A CDW Company) Now a member of CDW Canada, Scalar Decisions provides cybersecurity advice, handles managed security tasks, and designs security systems. The services they offer include penetration tests, endpoint security, and protection for cloud services. Scalar assists with the healthcare, finance, and public sectors in addressing complex cybersecurity challenges. 8. Optiv Canada For instance, cybersecurity companies in Mississauga, such as Optiv Canada, offer risk management, identity and access management, and security operations. Decisions are targeted at larger businesses, including using the latest technology to help them transform digitally. 9. Fortinet Canada Fortinet Canada offers network appliances, firewalls, and systems that combine different cybersecurity features. They build solutions designed for businesses that require cloud, IoT, and hybrid protection. The company’s products are popular among enterprises and service companies in Mississauga. 10. CyberClan This organization offers assistance for incident response, digital investigation, and managed security. They support companies in preparing for, detecting, and addressing cyber incidents, primarily to minimise downtime and data loss. This company offers its services to firms in the finance, retail, and healthcare industries. 11. Nuvia Dynamics The company mainly works on risk assessment, compliance consulting, and managed security services. Their answers enable companies to identify their weaknesses, establish suitable countermeasures, and comply with required regulations. The clients of Nuvia Dynamics are found in technology, manufacturing, and critical infrastructure sectors. 12. Trustwave Trustwave provides security services, finds threats, and makes sure customers remain compliant at all times. Through the system, they assist companies in seeing threats, handling possible risks, and dealing with attacks immediately.  13. Paladion (an Atos company) With Paladion, you can access managed detection and response, risk management, and security analytics. Thanks to AI, their system can spot threats immediately and respond to them automatically. Most of Paladion’s clients are large enterprises that have very strict standards for compliance and safety. 14. Sentryon It supports businesses by ensuring their network and computer security, plus the compliance standards of the organizations. These solutions aim to help smaller and medium-sized organizations increase their safety, as they might not have the skills needed inside the company.