AgileBlue Cerulean Agent vs Tetragon: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
AgileBlue Cerulean Agent is a commercial extended detection and response tool by AgileBlue. Tetragon is a free extended detection and response tool. Compare features, ratings, integrations, and community reviews side by side to find the best extended detection and response fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, 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.
Teams running Kubernetes clusters who need visibility into system calls and process behavior without agent overhead should start with Tetragon; its eBPF foundation catches runtime anomalies at kernel level while staying free and open-source, with 4,476 GitHub stars reflecting active adoption among infrastructure-first shops. The real value is enforcement,not just logging,which means you can block suspicious syscalls in real time rather than alerting after the fact. Skip this if your threat model centers on supply chain or pre-execution detection; Tetragon is strongest on runtime containment, weakest on the Govern function.
