15 Best Managed Cloud Security Services Companies (2026)

Gilzor combines cloud engineering with software development, DevOps, deployment, and long-term production support. Its technical stack includes AWS, Amazon EKS, Docker, Kubernetes, Ansible, GitHub Actions, CircleCI, and infrastructure services used to run production applications. The company is particularly relevant when cloud security needs to remain connected to application architecture, deployment pipelines, databases, APIs, and ongoing engineering work.

Its model fits product companies that prefer a technical partner capable of handling software and cloud infrastructure together rather than separating development from production operations.

Accenture provides managed cybersecurity through its Cybersecurity as a Service portfolio. The service is designed for organizations that want to outsource or co-source security functions, combining ongoing security management with modernization, automation, identity operations, and broader cyber transformation.

Its scale makes the company relevant to enterprises where cloud security is part of a wider security operating model involving multiple business units, technologies, identity systems, and compliance requirements. Accenture can support organizations from security strategy through implementation and continuing managed operations.

OSKI Solutions works across cloud architecture, migration, infrastructure automation, DevOps, observability, and ongoing cloud operations. Its current cloud practice covers AWS, Microsoft Azure, and Google Cloud, with security baselines and reviews incorporated into cloud architecture and production hardening.

DevOps engagements can include automated security scanning, infrastructure-as-code, CI/CD, Kubernetes, monitoring, rollback controls, and secure Azure configurations using technologies such as managed identities, Key Vault, private networking, and least-privilege access. This makes OSKI relevant when security needs to be built into cloud delivery and maintained alongside infrastructure.

Rackspace Technology combines managed cloud operations with dedicated cloud-native security services. Its managed offering supports AWS, Azure, and Google Cloud environments, while the security practice covers security technology deployment, continuous monitoring, threat management, SIEM, proactive detection, response, and cloud security assessments.

Its Cloud Native Security services also address application security, perimeter protection, vulnerabilities, and managed AWS security technologies such as AWS Shield, AWS WAF, and AWS Firewall Manager. This breadth suits organizations that want infrastructure management and cybersecurity handled within the same cloud operations relationship.

net-devs provides cloud-native architecture and platform engineering across Azure, AWS, and Google Cloud. Its cloud work covers infrastructure-as-code, Kubernetes, platform engineering, deployment, and ongoing software evolution. Security is incorporated into its cloud architecture through identity controls, secrets management, network segmentation, audit logging, and Well-Architected practices.

The company is relevant to organizations that need security-conscious cloud engineering around production software, especially where infrastructure needs to remain reproducible, reviewable, and closely connected with the application development team.

Optiv has a dedicated cloud security portfolio covering both security architecture and managed operations. Its capabilities include Managed Cloud Security, CSPM, CNAPP, cloud detection and response, workload protection, container security, CIEM, CASB, DSPM, cloud governance, and incident response automation.

Optiv also operates managed security services and MDR capabilities, allowing organizations to connect cloud posture management with investigation, response, and wider SOC processes. Its cloud practice supports AWS, Microsoft Azure, and Google Cloud environments.

A-listware combines managed IT, cloud management, infrastructure monitoring, and managed security. Its managed services cover AWS, Azure, multi-cloud infrastructure, vulnerability assessments, compliance audits, penetration testing, server and cloud administration, DevOps, and continuous infrastructure monitoring.

Its managed security offering also includes cloud application protection, security audits, SIEM-related work, infrastructure security management, and incident response support. This setup is suited to businesses that want security incorporated into a broader managed IT and cloud support relationship.

CrowdStrike offers Falcon Complete Cloud Security, a fully managed cloud workload security service. The offering combines runtime protection with continuous monitoring, managed threat hunting, investigation, and response from CrowdStrike security teams.

Cloud Detection and Response expands visibility across cloud assets and workloads and provides 24/7 managed protection for organizations that do not want to build equivalent cloud security operations internally. CrowdStrike is particularly relevant when runtime cloud threats and workload protection are the primary concern.

21century.tech develops production software using senior engineers supported by AI-assisted development workflows. Its delivery model covers architecture, code review, QA, security judgment, automated testing, CI/CD, and deployment to either client infrastructure or infrastructure managed as part of the engagement.

For cloud security projects, the company's strongest fit is around secure application delivery and production engineering rather than standalone SOC operations. Teams building or modernizing cloud applications can use this model when infrastructure deployment, testing, security decisions, and application engineering need to remain closely connected.

Arctic Wolf provides Cloud Detection and Response alongside its broader Managed Detection and Response platform. The cloud service monitors IaaS and SaaS resources around the clock, investigates suspicious activity, handles response workflows, and provides guided remediation through its Concierge Security Team.

Cloud integrations include AWS, Microsoft Azure, Google Cloud Platform, Oracle Cloud, Microsoft 365, identity systems, SaaS applications, and other security platforms. Arctic Wolf is therefore suited to companies that want cloud monitoring integrated with wider endpoint, network, identity, and SaaS security operations.

SoftPro provides cloud development and infrastructure management around AWS and Microsoft Azure. Its work includes cloud-native applications, migration, containerization, cloud re-architecture, infrastructure oversight, and security-focused cloud implementation.

The company designs and manages cloud solutions with security, performance, and scalability in mind. For organizations seeking secure cloud engineering and continuing technical support, SoftPro offers an application-focused alternative to providers centered mainly on SOC monitoring and detection services.

Protera has a dedicated managed cloud security practice covering continuous monitoring, proactive threat detection, compliance management, risk assessment, vulnerability management, and incident response. Its security services extend from cloud infrastructure to applications and network controls.

The company works across AWS, Microsoft Azure, and Google Cloud Platform and combines security with broader managed cloud and enterprise infrastructure services. This makes Protera particularly relevant for organizations that want security management integrated with cloud operations rather than handled as a separate project.

IBM provides managed security services designed for hybrid cloud and multicloud environments. Its cloud security practice combines continuous visibility, management, remediation, threat response, cloud-native security controls, compliance assessment, and infrastructure protection.

Organizations can use IBM for centralized monitoring across multiple cloud providers, cloud security posture management, container security, automated remediation, and managed threat detection. Its wider security portfolio also includes identity and access management, endpoint security, incident response, threat intelligence, and X-Force security capabilities.

UnderDefense delivers managed cloud security built around continuous monitoring, threat detection, investigation, and response. Its service integrates cloud logs and signals with SIEM, EDR, and other security systems, then uses automation and analyst oversight to prioritize genuine threats.

Coverage includes AWS, Microsoft Azure, Google Cloud, Kubernetes, SaaS applications, and hybrid or multi-cloud environments. UnderDefense also supports security assessments, compliance work, remediation, and forensic-level investigation, making it relevant for companies that need continuous security operations rather than periodic cloud assessments.

Integrity360 operates a dedicated managed cloud security service focused on protecting cloud assets while connecting cloud controls with broader cybersecurity operations. Its offering includes end-to-end cloud risk management and access to SOC and service desk capabilities.

The wider Integrity360 portfolio covers managed detection and response, incident response, threat exposure management, cybersecurity testing, Microsoft security, compliance, and professional security services. This breadth is useful for organizations that want cloud monitoring connected with endpoint, identity, network, and incident response processes.