Website security can mean very different things depending on the system being protected. Some companies concentrate on penetration testing and vulnerability discovery, while others provide WAF, DDoS protection, secure development, cloud security, or ongoing technical maintenance.
This list brings together European providers with different approaches so businesses can compare the type of security support that fits their websites and web applications.
Gilzor develops and maintains custom web applications, mobile products, and other digital platforms with security considered throughout the engineering process. Their work covers architecture, development, quality assurance, application audits, troubleshooting, and post-launch maintenance. For businesses in Europe, this makes them relevant when website security needs to be addressed together with the underlying software rather than through a standalone security product.
The company can review existing applications for technical problems, improve architecture, test releases, and maintain systems as they change. This approach is particularly relevant for startups and product teams that need development and security work handled within the same delivery cycle.
NCC Group focuses directly on cybersecurity, combining technical assurance with consulting, managed services, threat intelligence, and incident response. For websites and web applications, their work can include security reviews, vulnerability assessment, penetration testing, and broader analysis of how an application fits into an organization's security environment.
Their scope goes beyond finding isolated weaknesses. Security reviews can examine controls, business risks, threat exposure, and remediation priorities, which is useful for organizations that need website security connected to a wider cybersecurity program.
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Mobian Studio develops digital products and provides engineering teams for projects involving mobile applications, backend systems, cloud infrastructure, integrations, and other custom software. Security is handled as part of application architecture, QA, infrastructure decisions, and ongoing software maintenance rather than positioned as a separate managed cybersecurity service.
This can suit companies that need a website or web platform built and maintained with attention to code quality, system stability, infrastructure, and controlled releases. Their broader delivery model also covers legacy integrations and post-launch support, which matters when existing systems need to remain maintainable as new functionality is introduced.
Myra Security is much closer to the traditional website security provider model. The German company protects websites, portals, applications, APIs, and network infrastructure through managed security technologies designed for European regulatory requirements.
Its application security portfolio includes a Web Application Firewall, DDoS protection, bot management, and CDN services. The WAF filters malicious requests before they reach application servers, while DDoS protection is intended to keep online services available during attacks. Myra also emphasizes European data handling and GDPR-related requirements.
Itexus develops software for financial organizations, including banks, fintech companies, brokers, and other businesses operating in regulated environments. Their projects bring software architecture, development, DevOps, testing, infrastructure work, and compliance considerations into the same engineering process.
For website and web application security, this is most relevant where the product contains sensitive financial or customer data and cannot be treated like a simple public website. Security considerations can extend into application architecture, infrastructure protection, testing, access controls, and maintenance as financial systems evolve.
Link11 provides security specifically for web applications, APIs, and network infrastructure. Its WAAP platform combines a Web Application Firewall, web DDoS protection, bot management, and API security, allowing several common application-layer defenses to be managed through one environment.
Businesses can use its services to filter malicious requests, reduce bot abuse, defend against Layer 7 DDoS attacks, and protect APIs from unauthorized or suspicious traffic. Link11 operates as a European provider and emphasizes EU jurisdiction and data sovereignty as part of its platform design.
OSKI builds custom software and works across cloud platforms, DevOps, integrations, frontend systems, CMS projects, and software modernization. Security enters this work mainly through infrastructure design, deployment, data handling, testing, and the way integrations are implemented rather than through a standalone website security product.
Besides, they provide integrating security measures into API connections, cloud environments, and modernization projects. This puts OSKI closer to a secure engineering partner than a conventional penetration-testing firm, which may suit businesses that need security addressed while a website or web application is being rebuilt or extended.
Integrity360 offers managed cybersecurity services covering monitoring, incident response, cyber resilience, compliance, testing, and threat exposure management. Rather than concentrating only on the website layer, they look at the broader environment around online systems, including identities, cloud infrastructure, endpoints, and business data.
Their cybersecurity testing and threat exposure services can help organizations identify weaknesses before they develop into incidents. Continuous monitoring and response capabilities make the company more relevant for businesses that need ongoing security operations rather than an occasional website scan.
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SoftPro creates custom software, web applications, cloud systems, and Microsoft-based solutions, with security addressed in both application and cloud work. They deal with cloud applications and the use of controls such as encryption, multi-factor authentication, and role-based access where sensitive business data is involved.
The company provides its services around cloud security in several European markets. This makes SoftPro more relevant to businesses that need security connected with application development, Azure-based infrastructure, migration, or modernization rather than a standalone website protection platform.
Sentrium concentrates on offensive security and cybersecurity consulting, making it one of the more directly security-focused companies in this list. Its testing services cover websites, web applications, APIs, cloud environments, mobile applications, and networks.
This makes the company relevant when a business wants to identify exploitable weaknesses rather than simply install a protection layer. Its wider consulting work includes vulnerability assessments and support around security management and regulatory requirements, so testing findings can be connected to remediation and governance work.
A-listware combines software engineering and infrastructure services with a dedicated cybersecurity offering. Its published security services include security assessments, penetration testing, security testing, code review, managed security, information security consulting, and compliance assessments.
That broader mix can be useful for companies that need application security work followed by engineering changes. A vulnerability discovered during assessment does not have to remain disconnected from software development, testing, cloud management, or infrastructure support, since those capabilities sit within the same service portfolio.
PortSwigger is closely associated with web application security through Burp Suite, a widely used toolkit for web security testing. Its products support manual testing, automated scanning, vulnerability discovery, attack surface analysis, and security work within development processes.
The company's focus is narrower than that of a managed cybersecurity provider. Instead of operating a complete outsourced security program, its technology is aimed at security teams, penetration testers, and developers that need to find and investigate vulnerabilities in web applications.
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Net-devs builds enterprise software using senior-led engineering teams working across backend technologies, cloud platforms, frontend systems, AI engineering, and platform infrastructure. Its delivery process includes both automated and manual QA for stability, security, and correctness before software reaches production.
Mainly, the company handles secure software delivery, cloud-native architecture, infrastructure-as-code, application testing, and long-term maintenance of business applications. Their engineering work covers backend systems, frontend development, cloud infrastructure, automated and manual QA, and production support.
ImmuniWeb provides application security testing for websites, web applications, APIs, mobile applications, cloud environments, and network infrastructure. Its services cover web security scanning, web and API penetration testing, attack surface management, continuous penetration testing, and threat exposure management.
For website security, ImmuniWeb can test application vulnerabilities, web server configuration, encryption, HTTP security headers, outdated CMS components, DNSSEC, and controls related to GDPR and PCI DSS. Continuous monitoring and DevSecOps integrations allow security testing to become part of ongoing application development and maintenance. The company is based in Geneva, Switzerland, with a European office in London.
Outpost24 handles application security, exposure management, penetration testing, vulnerability management, and external attack surface monitoring. Its application security services cover web applications, APIs, and mobile applications, combining automated scanning with testing carried out by security specialists.
Web application security work includes dynamic application security testing, continuous vulnerability monitoring, web application penetration testing, dependency analysis, and remediation guidance. Teams can review findings through a central platform, communicate with testers, request retesting, and connect results with tools such as Jira and ServiceNow. Outpost24 originated in Sweden and has its headquarters in Stockholm.
Website security is rarely about a single tool or one type of check. Some businesses need regular penetration testing, others need protection against bots and DDoS attacks, and some need stronger security built into the application, cloud setup, and release process from the start.
The practical part is matching the provider to the actual risk. A public marketing site has very different needs from a fintech platform, customer portal, or API-heavy product. Before choosing a partner, it is worth being clear about what needs protection, how often testing should happen, and whether the job is mainly prevention, monitoring, fixing existing issues, or all three.
