full comparison of Zeek vs Suricata vs Wazuh. The most important thing to understand is that Wazuh plays in a completely different category than Zeek and Suricata, though they complement each other very well.
Quick Summary Table
| Zeek | Suricata | Wazuh | |
|---|---|---|---|
| Category | Network traffic analyzer / NSM | Network IDS / IPS / NSM | SIEM / XDR / Endpoint security platform |
| Deployment | Network sensor (passive) | Network sensor (passive or inline) | Agent on endpoints + central server |
| Primary focus | Network metadata & forensics | Signature-based threat detection | Endpoint visibility, log correlation, compliance |
| Detects via | Protocol analysis, scripting, anomalies | Rules/signatures (Snort-compatible) | Log analysis, FIM, configuration assessment, vulnerability detection |
| Can block traffic? | No | Yes (IPS mode) | Limited (active response on endpoints) |
| Endpoint visibility | None | None | Deep (agents on hosts) |
| Network visibility | Deep protocol metadata | Deep packet inspection + alerts | Limited (via integrated Zeek or log ingestion) |
| SIEM capabilities | No | No | Yes (built-in) |
| Best for | Network forensics & hunting | Real-time threat detection & blocking | Centralized monitoring, compliance, endpoint protection |
Zeek
Zeek is a passive network traffic analyzer that produces rich, structured logs about everything happening on your network.
- Outputs detailed protocol logs (HTTP, DNS, SSL, SMB, etc.)
- Scriptable for custom anomaly detection
- No blocking capability; purely observational
- Ideal for incident response and threat hunting
Suricata
Suricata is a high-performance network IDS/IPS engine that detects threats using signatures/rules.
- Uses rule files (compatible with Snort rules and Emerging Threats)
- Can run in IDS mode (alert only) or IPS mode (inline blocking) Suricata IPS Documentation
- Also produces metadata logs (EVE JSON), overlapping with some of Zeek’s functionality
- Multi-threaded and optimized for high throughput
Wazuh
Wazuh is an open-source SIEM and XDR platform focused on endpoint and cloud workload protection.
Key capabilities include:
- File Integrity Monitoring (FIM): Detects unauthorized file changes
- Configuration Assessment: Checks systems against CIS benchmarks
- Vulnerability Detection: Scans installed packages for known CVEs
- Log Analysis: Collects and correlates logs from endpoints, network devices, cloud, and apps
- Malware/Rootkit Detection: Behavioral detection on endpoints
- Active Response: Can execute countermeasures (e.g., block IP, kill process) on endpoints
- Built-in dashboards and alerting (no separate SIEM required, though it can feed into Elastic too)
How They Fit Together
This is the key point: these three tools are not direct competitors. They solve different layers of the security stack.
| Layer | Tool |
|---|---|
| Network metadata & forensics | Zeek |
| Network threat detection & blocking | Suricata |
| Endpoint visibility, log correlation, compliance | Wazuh |
In fact, Wazuh themselves publish guidance on integrating Wazuh + Zeek for network security monitoring.
Wazuh Blog: Network Security Monitoring with Wazuh and Zeek
A common open-source SOC stack looks like this:
- Suricata on network sensors for real-time threat detection and IPS
- Zeek on the same sensors for deep protocol metadata and hunting
- Wazuh agents on all endpoints for host-level visibility, FIM, vulnerability detection, and as the central SIEM correlating everything together
When to Choose What
| Your Need | Best Choice |
|---|---|
| Need to detect known threats on the network and block them | Suricata |
| Need deep network metadata for investigations | Zeek |
| Need endpoint monitoring, file integrity, compliance reporting | Wazuh |
| Building a full SOC from scratch with no budget | Wazuh + Suricata + Zeek together |
| Already have a SIEM and just need network detection | Suricata + Zeek |
| Need a unified platform with dashboards and alerting out of the box | Wazuh (it includes the SIEM layer) |
Bottom Line
- Zeek = Network historian (what happened, in extreme detail)
- Suricata = Network security guard (detects and can block known bad traffic)
- Wazuh = Endpoint and cloud watchdog + central brain (SIEM/XDR that ties it all together)
