# Corelight Zeek vs TEHTRIS NTA: side-by-side comparison (2026)

[Corelight Zeek](https://cybersectools.com/tools/corelight-zeek) is a free [network detection and response](https://cybersectools.com/categories/ndr) solution by [Corelight](https://cybersectools.com/companies/corelight). [TEHTRIS NTA](https://cybersectools.com/tools/tehtris-nta) is a commercial [network detection and response](https://cybersectools.com/categories/ndr) solution by [TEHTRIS](https://cybersectools.com/companies/tehtris). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Corelight Zeek | TEHTRIS NTA |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Network Detection and Response | Network Detection and Response |
| Verified | No | No |
| Deployment type | Hybrid | On-Premises |
| Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | Corelight | TEHTRIS |
| Headquarters | – | – |

### Use cases and capabilities

| | Corelight Zeek | TEHTRIS NTA |
|---|---|---|
| Open Source | Yes | – |
| Zeek | Yes | – |
| Network Monitoring | Yes | Yes |
| Anomaly Detection | – | Yes |
| Network Forensic Analysis | – | Yes |

### Core features

**Corelight Zeek**

10 features listed. Sign in on the page to see them.

**TEHTRIS NTA**

10 features listed. Sign in on the page to see them.

### Integrations

**Corelight Zeek**

1 integration listed. Sign in on the page to see them.

**TEHTRIS NTA**

3 integrations listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [Corelight Zeek](https://cybersectools.com/tools/corelight-zeek) fits if you need both cloud and on-premises options and you need a free product.
- [TEHTRIS NTA](https://cybersectools.com/tools/tehtris-nta) fits if you need to run it on your own servers.

## Corelight Zeek vs TEHTRIS NTA FAQ

Common questions when comparing Corelight Zeek vs TEHTRIS NTA for network detection and response.

### What is the difference between Corelight Zeek and TEHTRIS NTA?

**Corelight Zeek**: Open source network security monitoring tool for traffic analysis. Built by Corelight.

**TEHTRIS NTA**: Network traffic analysis tool for real-time intrusion detection and monitoring. Built by TEHTRIS.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes Corelight Zeek and TEHTRIS NTA?

**Corelight Zeek** is made by Corelight. **TEHTRIS NTA** is made by TEHTRIS. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Corelight Zeek a good alternative to TEHTRIS NTA?

Often, yes. Corelight Zeek and TEHTRIS NTA are both Network Detection and Response products, and both cover Network Monitoring. Key differences: Corelight Zeek is Free while TEHTRIS NTA is Commercial. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Corelight Zeek vs Corelight Open NDR Platform](https://cybersectools.com/compare/corelight-open-ndr-platform-vs-corelight-zeek)
- [Corelight Zeek vs Hyprfire Firebug](https://cybersectools.com/compare/corelight-zeek-vs-hyprfire-firebug)
- [Corelight Zeek vs Port0 Network Security](https://cybersectools.com/compare/corelight-zeek-vs-port0-network-security)
- [TEHTRIS NTA vs Corelight Open NDR Platform](https://cybersectools.com/compare/corelight-open-ndr-platform-vs-tehtris-nta)
- [TEHTRIS NTA vs Hyprfire Firebug](https://cybersectools.com/compare/hyprfire-firebug-vs-tehtris-nta)
- [TEHTRIS NTA vs Port0 Network Security](https://cybersectools.com/compare/port0-network-security-vs-tehtris-nta)

## Alternatives to each

- [See all Corelight Zeek alternatives](https://cybersectools.com/alternatives/corelight-zeek)
- [See all TEHTRIS NTA alternatives](https://cybersectools.com/alternatives/tehtris-nta)

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Source: https://cybersectools.com/compare/corelight-zeek-vs-tehtris-nta

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/corelight-zeek.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Corelight Zeek and TEHTRIS NTA: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md