14 Best Managed Network Security Companies (2026)

Gilzor supports web and mobile products from development through production operations, with security incorporated into architecture, deployment, monitoring, and ongoing engineering. Its production-readiness work includes reviews of authentication, permissions, data protection, infrastructure, reliability, and security risks, while post-launch support can extend into monitoring and cloud operations.

This approach is relevant for product companies that want security work closely connected with the application and infrastructure being maintained. Gilzor can address production issues, access controls, cloud configuration, deployment, and technical remediation without separating those tasks from the engineering team responsible for the underlying product.

NTT DATA operates managed network services that combine enterprise connectivity with security management. Its portfolio includes Managed Network Security, Managed SASE, campus networks, SD-WAN, internet connectivity, IoT networking, and Network as a Service. Security incidents can be monitored and managed around the clock as part of the wider network operating model.

The company is particularly relevant to multinational organizations with distributed branches, campuses, data centers, and cloud environments. Network and security functions can be managed together instead of assigning connectivity, network operations, and security controls to separate providers.

A-listware combines managed IT infrastructure with a dedicated managed security practice. Its security work covers continuous monitoring, SIEM configuration, firewalls, IDS/IPS, endpoint controls, vulnerability assessments, penetration testing, DDoS-related protection, and incident response support. Network Operations Center management is also part of its managed infrastructure offering.

The company can support cloud and on-premises environments, making it relevant when network security has to work alongside server administration, cloud services, application support, and DevOps. Its managed model is designed for companies that want ongoing operational coverage instead of relying only on periodic security assessments.

SoftPro combines cloud development and ongoing infrastructure support with security controls for AWS and Microsoft Azure environments. Its cloud security work includes firewall management, identity and access management, data encryption, and security practices aligned with requirements such as GDPR, HIPAA, and ISO standards. The company also provides cloud migration, hybrid and multi-cloud development, platform maintenance, and ongoing application support.

Within managed network security projects, SoftPro is most relevant to organizations whose network protection is closely connected with cloud infrastructure. Its team can manage firewall-related controls and access policies as part of maintaining and improving a cloud environment, rather than treating security as a separate one-time assessment.

Verizon Business provides managed network and cybersecurity services covering security devices, network infrastructure, cloud environments, remote access, DDoS mitigation, and threat detection. Its Security Device Monitoring and Management service provides 24/7 monitoring and management for supported security technology across multiple locations.

The wider portfolio can connect security operations with managed WAN and LAN services, which is useful for companies trying to reduce the number of vendors responsible for network availability and protection. Verizon also takes a vendor-neutral approach to managed security devices, allowing organizations to retain established security investments while outsourcing operational management. 

OSKI Solutions combines managed IT operations with cloud infrastructure management and cybersecurity work. Its managed services cover monitoring, alerting, security patching, incident response, backups, AWS and Azure operations, and ongoing infrastructure maintenance. Its cybersecurity practice also uses technologies such as Microsoft Sentinel, AWS GuardDuty, and Elastic SIEM for threat detection and centralized security monitoring.

The model fits cloud-based applications where network, infrastructure, deployment, and application security need to be managed together. OSKI can design networking and security controls during cloud architecture work and continue operating the environment through monitoring, patching, incident handling, and ongoing optimization.

IBM offers Managed Network Security Services for organizations that want security devices monitored and operated by an external security team. The service supports technologies including next-generation firewalls, intrusion detection and prevention systems, unified threat management, and secure web gateways across cloud and on-premises environments.

Management can include monitoring, security policy administration, log and alert analysis, change management, and reporting. IBM supports technologies from multiple vendors, including Check Point, Fortinet, Juniper, Palo Alto Networks, and Cisco, making the service applicable to enterprises with established multi-vendor security infrastructure.

Orange Cyberdefense delivers managed security services across network, cloud, identity, detection, and security posture management. Managed Firewall is part of the portfolio, with ongoing operating-environment analysis, release management, policy reviews, configuration improvement, and threat-intelligence-driven blocking.

Its security model can also extend into SASE, threat exposure management, detection and response, OT security, and cyber threat intelligence. This breadth makes Orange Cyberdefense relevant to organizations that want network controls managed within a larger cyber resilience program rather than operating firewall management as an isolated function. 

Kyndryl approaches network security as part of wider network modernization and managed operations. Its Managed Network and Security Services combine integrated security and network operations through a security and network operations model, with proactive monitoring and service-level commitments.

The service is suited to organizations modernizing large networks while still needing ongoing operational responsibility after deployment. Kyndryl can connect network assessment, modernization, connectivity, security, and managed operations within the same engagement, reducing the separation between teams responsible for performance and those responsible for protecting the environment.

Tata Communications combines global networking with managed cybersecurity services covering network, cloud, edge, and threat management. Its network security portfolio includes managed firewall and UTM services, while its Security Service Edge offering provides continuous 24/7/365 protection against unauthorized network access across cloud and on-premises estates.

The company also delivers managed SASE and integrates security services with WAN, SD-WAN, internet connectivity, and cloud networking. This model suits organizations that want a global provider to manage both the underlying network and the security controls protecting traffic, users, and distributed locations.

Fortinet combines its network security platform with managed security operations through services such as FortiGuard SOCaaS and Managed FortiGate Service. SOCaaS provides 24x7 threat monitoring, AI-assisted alert triage, expert investigation, and incident escalation, while Managed FortiGate Service adds expert-led network operations for FortiGate environments.

The two services can work together so security alerts lead into firewall policy changes, containment, and remediation actions. This is particularly useful for organizations already using Fortinet networking and security technology and wanting continuous operational support without building a full internal SOC and network security operations team.

MCK Network Solutions combines managed networking with cybersecurity services for businesses across the United States and Canada. Its managed network portfolio covers LAN, Wi-Fi, SD-WAN, secure gateways, ZTNA, and SASE, while its security services extend into managed SOC, threat monitoring, and incident response. MCK's Unified SASE model brings SD-WAN, firewall capabilities, secure web gateway, CASB, and zero trust access into a managed cloud-based environment with 24/7 support. This makes the company relevant for distributed organizations that want networking and security managed through the same provider.

21CENTURY.TECH is an AI-native software engineering studio working with production software, application architecture, testing, CI/CD, deployment, and infrastructure-related delivery. Senior engineers remain responsible for architecture, code review, QA, security judgment, and final technical decisions, while AI tools are used to speed up development and testing. The company can deploy software to client infrastructure or infrastructure managed by its own team.

Within managed network security projects, 21CENTURY.TECH is most relevant when security work is closely connected with application infrastructure, deployment pipelines, production architecture, and technical remediation. Its engineering model can support secure configuration and production changes when vulnerabilities or infrastructure issues require code, architecture, or deployment updates.

Net Devs provides cloud and platform engineering for enterprise systems running on Azure, AWS, and Google Cloud. Its infrastructure work includes cloud-native architecture, infrastructure-as-code, Kubernetes, deployment, and continued production evolution. Security is built into this work through identity controls, secrets management, network segmentation, audit logging, and security-focused testing before production releases.

For managed network security projects, Net Devs is most relevant when network protection forms part of a broader cloud platform or infrastructure engagement. The team can design and maintain secure cloud environments, automate infrastructure configuration, manage platform changes, and address security requirements alongside ongoing engineering work.