# Nucleon Malprob vs Stairwell Variant Discovery: side-by-side comparison (2026)

[Nucleon Malprob](https://cybersectools.com/tools/nucleon-malprob) is a commercial [malware analysis](https://cybersectools.com/categories/malware-analysis) solution by [Nucleon Security](https://cybersectools.com/companies/nucleon-security). [Stairwell Variant Discovery](https://cybersectools.com/tools/stairwell-variant-discovery) is a commercial [malware analysis](https://cybersectools.com/categories/malware-analysis) solution by [Stairwell](https://cybersectools.com/companies/stairwell). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Nucleon Malprob | Stairwell Variant Discovery |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Malware Analysis | Malware Analysis |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | Nucleon Security | Stairwell |
| Headquarters | – | – |

### Use cases and capabilities

| | Nucleon Malprob | Stairwell Variant Discovery |
|---|---|---|
| Zero Day | Yes | – |
| Android Security | Yes | – |
| YARA | – | Yes |
| IOC | – | Yes |
| Cyber Threat Intelligence | – | Yes |

### Core features

**Nucleon Malprob**

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

**Stairwell Variant Discovery**

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

### Integrations

**Nucleon Malprob**

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

**Stairwell Variant Discovery**

9 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.

- [Nucleon Malprob](https://cybersectools.com/tools/nucleon-malprob) fits if you are a startup or a small business.

## Nucleon Malprob vs Stairwell Variant Discovery FAQ

Common questions when comparing Nucleon Malprob vs Stairwell Variant Discovery for malware analysis.

### What is the difference between Nucleon Malprob and Stairwell Variant Discovery?

**Nucleon Malprob**: AI-powered malware detection service with web interface and API access. Built by Nucleon Security.

**Stairwell Variant Discovery**: Expands a single malware hash into full family visibility via structural analysis. Built by Stairwell.

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

### Who makes Nucleon Malprob and Stairwell Variant Discovery?

**Nucleon Malprob** is made by Nucleon Security. **Stairwell Variant Discovery** is made by Stairwell. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Nucleon Malprob a good alternative to Stairwell Variant Discovery?

Often, yes. Nucleon Malprob and Stairwell Variant Discovery are both Malware Analysis products. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Nucleon Malprob vs Stairwell Analyze](https://cybersectools.com/compare/nucleon-malprob-vs-stairwell-analyze)
- [Nucleon Malprob vs ANY.RUN](https://cybersectools.com/compare/anyrun-vs-nucleon-malprob)
- [Nucleon Malprob vs PolySwarm Malware Intelligence](https://cybersectools.com/compare/nucleon-malprob-vs-polyswarm-malware-intelligence)
- [Stairwell Variant Discovery vs Stairwell Analyze](https://cybersectools.com/compare/stairwell-analyze-vs-stairwell-variant-discovery)
- [Stairwell Variant Discovery vs ANY.RUN](https://cybersectools.com/compare/anyrun-vs-stairwell-variant-discovery)
- [Stairwell Variant Discovery vs PolySwarm Malware Intelligence](https://cybersectools.com/compare/polyswarm-malware-intelligence-vs-stairwell-variant-discovery)

## Alternatives to each

- [See all Nucleon Malprob alternatives](https://cybersectools.com/alternatives/nucleon-malprob)
- [See all Stairwell Variant Discovery alternatives](https://cybersectools.com/alternatives/stairwell-variant-discovery)

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Source: https://cybersectools.com/compare/nucleon-malprob-vs-stairwell-variant-discovery

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

More on Nucleon Malprob and Stairwell Variant Discovery: 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