Corelight vs Fidelis Network
Corelight
Corelight is a network detection and response (NDR) vendor founded in 2013 by the creators of the open-source Zeek framework (formerly Bro). Its Open NDR Platform combines Zeek network evidence with Suricata intrusion detection, YARA file analysis, behavioral analytics, machine learning, and packet capture for threat detection, investigation, and incident response. It is positioned as an open-core product and integrates with SIEM and XDR tools, supporting on-premise appliances, virtual and software sensors, and cloud deployments across AWS, Azure, and GCP. Corelight remains a steward of the Zeek project.
Pros
- Built on the open-source Zeek standard, producing high-fidelity, well-enriched network logs
- Combines Zeek evidence with Suricata IDS and packet capture for detection and forensic context
- Flexible deployment across appliances, virtual sensors, and major cloud providers
Cons
- Reported learning curve; better suited to larger organizations and experienced SOC teams
- Alerting reported as limited to Zeek and Suricata detections
- Total cost can be high when feeding ingest-priced SIEMs, and pricing is not publicly listed
Pricing: Contact for pricing
Fidelis Network
Fidelis Network is the network detection and response (NDR) component of the Fidelis Elevate XDR platform from Fidelis Security. It uses the company's patented Deep Session Inspection technology to analyze traffic across ports and protocols, performing network traffic analysis, behavior anomaly detection, data loss prevention, and sandboxing. The product integrates with Fidelis Elevate endpoint detection and deception capabilities for correlated detection and response. Fidelis traces its origins to Fidelis Security Systems, founded in 2002, and has a documented history serving United States government and defense customers.
Pros
- Deep, content-level network visibility via patented Deep Session Inspection
- Integrates with endpoint and deception telemetry within Fidelis Elevate
- Holds federal certifications and contract vehicles relevant to government buyers
Cons
- Pricing is not publicly published and requires contacting the vendor
- Appliance and sensor based architecture can add deployment and tuning complexity
- Strongest feature value is realized within the broader Fidelis Elevate platform
Pricing: Contact for pricing