# Nessus Professional vs ThreatMapper: side-by-side comparison (2026)

[Nessus Professional](https://cybersectools.com/tools/nessus-professional) is a commercial [vulnerability assessment](https://cybersectools.com/categories/vulnerability-assessment) solution by [Tenable](https://cybersectools.com/companies/tenable). [ThreatMapper](https://cybersectools.com/tools/threatmapper) is a free [vulnerability assessment](https://cybersectools.com/categories/vulnerability-assessment) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Nessus Professional | ThreatMapper |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Vulnerability Assessment | Vulnerability Assessment |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| GitHub stars | – | 5,236 |
| Last commit | – | Mar 2026 |
| Company | Tenable | – |
| Headquarters | – | – |

### Use cases and capabilities

| | Nessus Professional | ThreatMapper |
|---|---|---|
| Vulnerability | Yes | – |
| Security Scanning | Yes | – |
| CVE | Yes | Yes |
| Penetration Testing Framework | Yes | – |
| NIST | Yes | – |
| PCI DSS | Yes | – |
| CIS | Yes | – |
| Network Scanning | Yes | – |
| VAPT | Yes | – |
| Cloud Native | – | Yes |

### Core features

**Nessus Professional**

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

**ThreatMapper**

No features listed.

## Which one fits you

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

- [Nessus Professional](https://cybersectools.com/tools/nessus-professional) fits if you need to run it on your own servers and you are a startup.
- [ThreatMapper](https://cybersectools.com/tools/threatmapper) fits if you want a cloud product, you need a free product and you want an open-source product.

## Nessus Professional vs ThreatMapper FAQ

Common questions when comparing Nessus Professional vs ThreatMapper for vulnerability assessment.

### What is the difference between Nessus Professional and ThreatMapper?

**Nessus Professional**: Vulnerability scanner for assessing networks, systems, and apps for security flaws. Built by Tenable.

**ThreatMapper**: A runtime threat management and attack path enumeration tool for cloud-native environments.

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

### Who makes Nessus Professional and ThreatMapper?

**Nessus Professional** is made by Tenable. **ThreatMapper** is open-source with 5,236 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Nessus Professional a good alternative to ThreatMapper?

Often, yes. Nessus Professional and ThreatMapper are both Vulnerability Assessment products, and both cover CVE. Key differences: Nessus Professional is Commercial while ThreatMapper is Free, ThreatMapper is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Nessus Professional vs Zentara AVAS](https://cybersectools.com/compare/nessus-professional-vs-zentara-avas)
- [Nessus Professional vs Webray RayScan](https://cybersectools.com/compare/nessus-professional-vs-webray-rayscan)
- [Nessus Professional vs Positive Technologies XSpider PRO](https://cybersectools.com/compare/nessus-professional-vs-positive-technologies-xspider-pro)
- [ThreatMapper vs Zentara AVAS](https://cybersectools.com/compare/threatmapper-vs-zentara-avas)
- [ThreatMapper vs Webray RayScan](https://cybersectools.com/compare/threatmapper-vs-webray-rayscan)
- [ThreatMapper vs Positive Technologies XSpider PRO](https://cybersectools.com/compare/positive-technologies-xspider-pro-vs-threatmapper)

## Alternatives to each

- [See all Nessus Professional alternatives](https://cybersectools.com/alternatives/nessus-professional)
- [See all ThreatMapper alternatives](https://cybersectools.com/alternatives/threatmapper)

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Source: https://cybersectools.com/compare/nessus-professional-vs-threatmapper

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

More on Nessus Professional and ThreatMapper: 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