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AgileBlue Cerulean Agent is a commercial extended detection and response tool by AgileBlue. Fidelis Security is a commercial extended detection and response tool by Fidelis Security. Compare features, ratings, integrations, and community reviews side by side to find the best extended detection and response fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Mid-market and enterprise security teams managing hybrid infrastructure will get the most from AgileBlue Cerulean Agent because its behavioral analytics catch threats that signature-based detection misses, and the lightweight agent actually deploys without grinding endpoints to a halt. The tool covers four NIST CSF 2.0 functions across detection and incident response, with particular strength in continuous monitoring and threat analysis. Skip this if your team needs deep forensic replay or extensive third-party integrations; Cerulean Agent prioritizes real-time detection over post-incident investigation depth.
Mid-market and enterprise teams drowning in alert fatigue will find real value in Fidelis Security's deep session inspection and AD-aware network detection, which cut false positives by correlating endpoint and network signals that most XDR platforms treat separately. The platform covers all four NIST Detect and Respond functions with particular strength in continuous monitoring and incident analysis through 300+ forensic attributes and automated response capabilities. Skip this if you need a lightweight, cloud-native XDR; Fidelis is built for organizations with the infrastructure to run hybrid deployments and the analyst headcount to operationalize deception strategies like poisoned data and decoys.
XDR agent providing endpoint telemetry and behavioral threat detection
XDR platform with NDR, EDR, deception, AD security, and CNAPP capabilities
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Common questions about comparing AgileBlue Cerulean Agent vs Fidelis Security for your extended detection and response needs.
AgileBlue Cerulean Agent: XDR agent providing endpoint telemetry and behavioral threat detection. built by AgileBlue. headquartered in United States. Core capabilities include Real-time endpoint telemetry collection, Behavioral analytics for threat detection, Automated threat response..
Fidelis Security: XDR platform with NDR, EDR, deception, AD security, and CNAPP capabilities. built by Fidelis Security. headquartered in United States. Core capabilities include Forensic and metadata collection from 300+ attributes, Threat detection with MITRE ATT&CK mappings, Deep Session Inspection technology..
Both serve the Extended Detection and Response market but differ in approach, feature depth, and target audience.
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