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

[ActiveState Library](https://cybersectools.com/tools/activestate-library) is a commercial [software composition analysis](https://cybersectools.com/categories/sca) solution by [ActiveState](https://cybersectools.com/companies/activestate). [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). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | ActiveState Library | Nessus Professional |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Software Composition Analysis | Vulnerability Assessment |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | ActiveState | Tenable |
| Headquarters | – | – |

### Use cases and capabilities

| | ActiveState Library | Nessus Professional |
|---|---|---|
| SCA | Yes | – |
| SBOM | Yes | – |
| Software Supply Chain | Yes | – |
| Dependency Scanning | Yes | – |
| License Compliance | Yes | – |
| Open Source | Yes | – |
| Package Security | Yes | – |
| CVE | Yes | Yes |
| Vulnerabilities | Yes | – |
| Secure Development | Yes | – |
| Vulnerability | – | Yes |
| Security Scanning | – | Yes |
| Penetration Testing Framework | – | Yes |
| NIST | – | Yes |
| PCI DSS | – | Yes |
| CIS | – | Yes |
| Network Scanning | – | Yes |
| VAPT | – | Yes |

### Core features

**ActiveState Library**

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

**Nessus Professional**

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

### Integrations

**ActiveState Library**

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

**Nessus Professional**

No integrations listed.

## Which one fits you

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

- [ActiveState Library](https://cybersectools.com/tools/activestate-library) fits if you want a cloud product.
- [Nessus Professional](https://cybersectools.com/tools/nessus-professional) fits if you need to run it on your own servers.

## ActiveState Library vs Nessus Professional FAQ

Common questions when comparing ActiveState Library vs Nessus Professional for software composition analysis.

### What is the difference between ActiveState Library and Nessus Professional?

**ActiveState Library**: Curated open-source package library with vuln tracking, SBOM, and license compliance. Built by ActiveState.

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

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

### Who makes ActiveState Library and Nessus Professional?

**ActiveState Library** is made by ActiveState. **Nessus Professional** is made by Tenable. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is ActiveState Library a good alternative to Nessus Professional?

In part. ActiveState Library and Nessus Professional are not in the same category on CybersecTools. Both cover CVE. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [ActiveState Library vs HeroDevs](https://cybersectools.com/compare/activestate-library-vs-herodevs)
- [ActiveState Library vs ActiveState Vulnerability Management](https://cybersectools.com/compare/activestate-library-vs-activestate-vulnerability-management)
- [ActiveState Library vs Hopper Security](https://cybersectools.com/compare/activestate-library-vs-hopper-security)
- [Nessus Professional vs HeroDevs](https://cybersectools.com/compare/herodevs-vs-nessus-professional)
- [Nessus Professional vs ActiveState Vulnerability Management](https://cybersectools.com/compare/activestate-vulnerability-management-vs-nessus-professional)
- [Nessus Professional vs Hopper Security](https://cybersectools.com/compare/hopper-security-vs-nessus-professional)

## Alternatives to each

- [See all ActiveState Library alternatives](https://cybersectools.com/alternatives/activestate-library)
- [See all Nessus Professional alternatives](https://cybersectools.com/alternatives/nessus-professional)

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

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

More on ActiveState Library and Nessus Professional: 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