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BackWhat is Agentless Security?
Agentless security is a cybersecurity approach that monitors, assesses, or scans IT assets without installing proprietary software agents on every host. It uses cloud APIs, storage snapshots, and other out-of-band methods to improve visibility into supported cloud workloads while reducing direct performance impact on production systems.
How Agentless Security Works?
Traditional agent-based security tools run directly on the host and use local system resources for monitoring and protection. In contrast, many agentless security platforms use out-of-band or snapshot-based scanning methods.
In snapshot-based implementations, the platform creates a copy of the workload’s disk or volume. It then analyzes the snapshot for vulnerabilities, malware indicators, secrets, or misconfigurations without running scanning code inside the live workload.
Agentless Security vs Agent-Based Security
| Capability | Agentless Monitoring | Agent-Based Protection |
| System Impact | Minimal direct CPU or RAM usage on the scanned workload | Uses local system resources for monitoring and protection |
| Deployment Speed | Often faster to deploy across supported cloud accounts | Requires installation on managed workloads |
| Visibility Scope | Disk, software inventory, and cloud configuration visibility | Runtime behavior, memory, and process-level visibility |
| Operational Risk | Lower risk of disrupting production workloads | Updates or conflicts may affect host stability |
Benefits of Agentless Security
Agentless security can help organizations identify risks in dormant or stopped assets. Security teams can also assess stopped virtual machines, unattached volumes, container images, and other supported resources that are difficult to inspect with host-based agents alone.
Because snapshot-based scanning operates out of band, it is better suited for visibility, assessment, and risk discovery than real-time runtime prevention.
Additionally, agentless approaches can help organizations:
- Reduce deployment complexity in cloud environments
- Improve visibility across supported workloads
- Support compliance and governance initiatives
- Lower the administrative overhead of maintaining host-based agents
Why do enterprises use agentless security?
As cloud-native infrastructure grows, deploying and managing agents across dynamic workloads becomes more operationally complex. Agentless security helps reduce coverage gaps by discovering and scanning supported workloads after cloud integrations and permissions are configured.
While agentless security does not replace runtime defense, it strengthens broader cloud security and compliance programs by helping organizations identify risks across supported assets and environments.
How Hexnode supports secure endpoint management
While agentless security focuses on cloud workload visibility, organizations still need to secure the endpoints used to access cloud platforms and security tools. Hexnode helps IT teams manage those devices through compliance policies, application controls, and endpoint visibility.
Hexnode also integrates with Microsoft Entra Conditional Access to share device compliance status, helping organizations enforce access policies based on compliant devices.
FAQs
Some agentless security tools can scan disk snapshots or volumes for malware indicators, suspicious files, or known malicious artifacts, depending on platform capabilities. However, snapshot-based agentless scanning usually has limited visibility into fileless malware or threats that exist only in live memory or active process behavior.
Agentless approaches are often useful in cloud environments because they can reduce deployment friction and minimize direct impact on production workloads. They can also help security teams improve visibility across supported cloud assets without installing software on every server, provided the required cloud permissions and integrations are configured.
One limitation of snapshot-based agentless scanning is reduced real-time runtime visibility and response capability. Endpoint or workload agents may provide runtime response actions, such as terminating malicious processes, depending on product capabilities. In contrast, agentless tools typically detect issues during scheduled scans, snapshot analysis, or recurring assessments.