Zeek
Open-source network traffic analysis and threat detection system
- Also known as
- zeek
Available worldwide
What is Zeek?
A passive network monitoring tool that analyzes traffic on sensors to generate detailed logs and file data for security investigation and integration with SIEM platforms, without interfering with network operations.
Zeek pricing
We don't have Zeek's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Fully open source and free with BSD license
What Zeek does
The capabilities that matter for network security, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment model
- Hybrid
- Behavioral anomaly detection
- ✓
- Full packet pcap retention
- -
- Encrypted traffic metadata analysis
- -
- Active endpoint containment response
- ✗
- Host microsegmentation
- -
- Network access control 802 1x
- -
- EDR crowdstrike sentinelone integration
- -
- Iot ot device discovery
- -
- Fips 140 2 certification
- -
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- Open source
Platform & deployment
Independently observed- CLI
- Linux
- Cloud / SaaS
- Hybrid
- On-premise
- Self-hosted
Integrations (5)
Independently observed- AWS•
- Slack
- SIEM→
- AWS Traffic Mirroring
- Kafka
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
Zeek FAQ
Common questions about Zeek, answered from independent, dated evidence.
What is Zeek?
A passive network monitoring tool that analyzes traffic on sensors to generate detailed logs and file data for security investigation and integration with SIEM platforms, without interfering with network operations. It is indexed under Network Security.
Source: https://zeek.org
Is Zeek free to use?
Zeek is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.
Source: https://zeek.org
Can Zeek be self-hosted?
Yes. Zeek can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://zeek.org
Zeek alternatives
Other network security we track, ranked by the same independent score.
- ExtraHop Reveal(x)Real-time network traffic analysis and threat detection platformlow · 45%
- Arkimelow · 27%
- Vectra AIAn AI-driven security platform that integrates threat detection with your existing enterprise security toolslow · 6%
- CorelightAI-powered network detection and response platform for hybrid security operationslow · 12%
- SnortOpen-source network intrusion detection and prevention systemlow · 22%
- IllumioA network microsegmentation platform that prevents breach propagation across cloud and on-premises infrastructure using zero trust principleslow · 46%
Compare Zeek
Side by side against other network security, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Zeek, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 63 | 0.09 | 5.9 | ✓ |
| Release cadence | 99 | 0.05 | 5.1 | ✓ |
| Security score | 72 | 0.04 | 3.0 | ✓ |
| Stars | 74 | 0.03 | 1.9 | ✓ |
| Capabilities | 29 | 0.06 | 1.8 | ✓ |
| Integrations | 17 | 0.06 | 1.1 | ✓ |
| Dependent projects | 5 | 0.06 | 0.3 | ✓ |
| Security posture | 0 | 0.21 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 100 | mediumsource · 2026-10-15 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 3 items | mediumsource · 2026-09-10 · 60% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Pricing model: open_source · Deployment model: hybrid · Behavioral anomaly detection: Yes · Active endpoint containment response: No | mediumsource · 2026-10-15 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 3 | mediumsource · 2026-10-15 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | C++ | highsource · 2026-10-15 · 90% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-10-15 · 75% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Scorecard | 7.2 | highsource · 2026-10-15 · 90% |
| Vulnerabilities | Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=homebrew&package_name=zeek&per_page=100 · Last 12m: 0 | highsource · 2026-10-15 · 90% |
| Trust center | https://zeek.org/category/security/ | mediumsource · 2026-10-15 · 60% |
Is Zeek the right choice for you?
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