Website security can be handled in very different ways. Some providers focus on penetration testing and security audits, while others build protection into application architecture, infrastructure, QA, deployment, and ongoing maintenance. The companies below represent several of these approaches, with an emphasis on security for websites and custom web applications.
1. Gilzor
Gilzor approaches website security through software engineering, quality assurance, architecture, and ongoing application maintenance. Its web development work covers architecture, frontend and backend development, testing, deployment, and post-launch support. Security is considered during QA and production-readiness work rather than treated only as a separate security product.
For existing web products, Gilzor can address authentication and access controls, database security, monitoring, testing, infrastructure improvements, and technical issues connected with application architecture. This approach is particularly relevant when security problems cannot be separated cleanly from the underlying codebase or infrastructure.
Key Facts
- Best for: Businesses securing custom websites and web applications
- Core services: Website security, secure web development, application QA, technical audits, maintenance, production readiness
- Specialization: Security-conscious custom software engineering
- Project types: Web applications, customer platforms, mobile products, existing application modernization
- Notable strength: Security handled alongside architecture, testing, deployment, and maintenance
Contact Information
- Website: www.gilzor.com
- Email: [email protected]
- Address: Poland, Warsaw, Office 58, street Adama Mickiewicza 37, 01-625
- LinkedIn: www.linkedin.com/company/gilzor-softwaredevelopment
2. Mobian
Mobian develops custom digital products for industries where security, reliability, and controlled access to data can become important engineering requirements. Its work spans architecture, software development, QA, monitoring, and post-launch support.
Rather than operating as a standalone managed website security provider, Mobian addresses security within product engineering. This distinction matters. The company is more relevant to organizations building or modernizing custom web platforms than to website owners looking only for malware removal, an external firewall, or automated vulnerability scanning.
Key Facts
- Best for: Security-sensitive custom software and web products
- Core services: Custom development, architecture, QA, monitoring, post-launch support
- Specialization: Full-cycle digital product engineering
- Relevant industries: Healthcare, fintech, telecommunications, enterprise IT
- Security approach: Security incorporated into application architecture and software development
Contact Information
- Website: mobian.studio
- Email: [email protected]
- Address: Harju maakond, Tallinn, Kesklinna Linnaosa, Masina tn 22, 10113
- LinkedIn: www.linkedin.com/company/mobian-studio
3. OSKI Solutions
OSKI Solutions combines cybersecurity services with software development, cloud engineering, DevOps, CMS work, and application maintenance. Its security capabilities include application security, penetration testing, security audits, DevSecOps, compliance support, and security consulting.
For websites already in production, the maintenance side is equally relevant. OSKI Solutions handles updates, security hardening, vulnerability remediation, framework and operating-system patches, dependency management, and ongoing application support. This puts it closer to an engineering-led security partner than a simple website scanning service.
Key Facts
- Best for: Websites requiring security work together with engineering and maintenance
- Core services: Application security, penetration testing, DevSecOps, security audits, website maintenance
- Specialization: Cybersecurity integrated with custom software and cloud engineering
- Website security areas: Patching, hardening, vulnerability remediation, secure deployment
- Additional capabilities: Compliance and security consulting
Contact Information
- Website: oski.site
- Phone: +48571282759
- Email: [email protected]
- Address: Kaupmehe tn 7-120, Tallinn, 10114, Estonia
- LinkedIn: www.linkedin.com/company/oski-solutions
4. Lengreo
Lengreo combines custom web development with a security-focused approach for cybersecurity and other B2B projects. Its web development services cover frontend and backend engineering, APIs, cloud-native systems, QA, DevOps, and infrastructure design. The company describes its infrastructure work as designed around scalability and security.
Its cybersecurity-focused development offering goes further, covering threat modeling, hardened backend architecture, authentication, rate limiting, encrypted data storage, access controls, monitoring, and security-conscious deployment. Lengreo therefore fits this list primarily as a secure web development provider rather than as a conventional managed cybersecurity company.
Key Facts
- Best for: Security-conscious custom websites and web applications
- Core services: Custom web development, backend development, APIs, QA, DevOps, maintenance
- Specialization: Secure web engineering for B2B and cybersecurity projects
- Security areas: Authentication, infrastructure security, access controls, monitoring, secure deployment
- Development approach: Security considered during architecture and implementation
Contact Information
- Website: lengreo.com
- Phone: +31 686 147 566
- Email: [email protected]
- Address: Vrijstraat 9 C/D, 5611 AT Eindhoven, Netherlands
- LinkedIn: www.linkedin.com/company/lengreo
- Twitter: x.com/Lengreo
- Instagram: www.instagram.com/lengreo.agency
5. 21century.tech
21century.tech operates as a software engineering studio rather than a dedicated cybersecurity provider. Its development model keeps human engineers responsible for architecture, business logic, code review, QA, security decisions, and deployment.
For website security projects, that makes the company more relevant when vulnerabilities or security requirements are tied to custom application development, refactoring, integrations, or infrastructure changes. It is less directly aligned with businesses searching for standalone penetration testing, malware cleanup, or managed firewall services.
Key Facts
- Best for: Security-conscious custom software development and refactoring
- Core services: Architecture, full-stack development, testing, code review, deployment
- Specialization: Custom software engineering
- Security approach: Security reviewed as part of engineering and architecture
- Project types: Custom applications, modernization, integrations, product development
Contact Information
- Website: 21century.tech
- Email: [email protected]
6. Itexus
Itexus works heavily with fintech software, where application security, access control, infrastructure protection, and regulatory requirements are often built into the project from the beginning. Its cybersecurity capabilities include security audits, penetration testing, threat detection, vulnerability assessment, and compliance-related work.
The company also handles security testing through its QA practice and supports cloud infrastructure, monitoring, patch management, backups, and incident response. The combination is particularly relevant to websites and web applications that process financial transactions, personal information, or other sensitive data.
Key Facts
- Best for: Security-sensitive fintech and financial web applications
- Core services: Security audits, penetration testing, threat detection, QA, cloud security, maintenance
- Specialization: Security and compliance for financial software
- Security areas: Access controls, data protection, infrastructure, vulnerability assessment, incident response
- Project types: Fintech platforms, financial applications, custom web systems
Contact Information
- Website: itexus.com
- Email: [email protected]
- Address: 8, The Green, STE road, Dover, DE 19901, United States
- LinkedIn: www.linkedin.com/company/itexus
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- Instagram: www.instagram.com/itexus.soft
7. SoftPro
SoftPro develops web applications and cloud systems with security addressed through architecture, infrastructure, deployment, and ongoing maintenance. Its web development work includes backend systems as well as updates, bug fixing, monitoring, and longer-term application support.
Cloud infrastructure is another relevant part of the offering. Security-related work can involve encryption, firewall management, identity and access management, and infrastructure running on platforms such as Microsoft Azure and AWS. SoftPro therefore fits security projects where protection is closely connected with application and cloud engineering.
Key Facts
- Best for: Secure web application and cloud development
- Core services: Web application development, cloud development, maintenance, monitoring
- Specialization: Cloud and custom software engineering
- Security areas: Encryption, firewall management, IAM, secure backend development
- Cloud platforms: Microsoft Azure and AWS
Contact Information
- Website: soft-pro.pl
- Address: Poland, Warsaw, Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401
8. A-listware
A-listware combines software development and IT services with a dedicated cybersecurity practice. Its offering covers web development, infrastructure, application services, QA, managed IT, and security work rather than leaving security solely to development testing.
Relevant capabilities include application security, ethical hacking, cloud security, DevSecOps, security monitoring, and compliance-related support. For website projects, this creates room for security controls to be considered during development as well as through a broader cybersecurity engagement.
Key Facts
- Best for: Businesses combining web engineering and cybersecurity work
- Core services: Cybersecurity, application security, web development, QA, infrastructure services
- Specialization: Security integrated into software delivery
- Security capabilities: Ethical hacking, cloud security, DevSecOps, monitoring, application testing
- Notable strength: Cybersecurity resources available alongside software engineering teams
Contact Information
- Website: a-listware.com
- Phone: +1 (888) 337 93 73
- Email: [email protected]
- Address: North Bergen, NJ 07047, USA
- LinkedIn: www.linkedin.com/company/a-listware
- Facebook: www.facebook.com/alistware
9. net-devs
net-devs develops enterprise software across backend systems, frontend applications, cloud environments, integrations, QA, and deployment. Its delivery process includes manual and automated testing intended to address application stability, correctness, and security before release.
The company is better understood as a secure software engineering provider than as a dedicated website security vendor. It can make sense when a security problem requires developers to inspect or change application code, architecture, deployment processes, or infrastructure instead of simply placing another security product in front of the site.
Key Facts
- Best for: Secure development of custom web and enterprise applications
- Core services: Software engineering, cloud development, frontend development, QA, deployment
- Specialization: Enterprise software delivery
- Security approach: Security testing integrated into QA and production delivery
- Project types: Web applications, enterprise systems, cloud platforms, integrations
Contact Information
- Website: net-devs.com
- Phone: +48 571 282 759
- Email: [email protected]
- Address: Obrzeżna 1D, 02-691 Warszawa
- LinkedIn: www.linkedin.com/company/net-devs
Conclusion
Website security is rarely one isolated task. A vulnerable site might need code changes, infrastructure work, better access controls, penetration testing, tighter deployment practices, or simply more disciplined maintenance. The right approach depends largely on what is being protected and where the actual risk sits.
For a straightforward public website, routine monitoring and security maintenance may be enough. A custom platform handling payments, customer accounts, or sensitive business data usually needs security built much deeper into the application itself. Cloud infrastructure, APIs, authentication, dependencies, and release processes all become part of the same conversation.
That is why comparing website security services purely by the length of a service list does not tell much. It makes more sense to look at the underlying problem first, then decide whether it calls for dedicated cybersecurity expertise, secure software engineering, ongoing maintenance, or a combination of all three.