# Salience xASM vs SurfaceDiff: side-by-side comparison (2026)

[Salience xASM](https://cybersectools.com/tools/salience-xasm) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Humanize Security](https://cybersectools.com/companies/humanize-security). [SurfaceDiff](https://cybersectools.com/tools/surfacediff) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [SurfaceDiff](https://cybersectools.com/companies/surfacediff). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions) picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Google Mandiant Attack Surface Management and 4 more.

## Side-by-side comparison

| | Salience xASM | SurfaceDiff |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Humanize Security | SurfaceDiff |
| Headquarters | – | – |

### Use cases and capabilities

| | Salience xASM | SurfaceDiff |
|---|---|---|
| Port Scanning | Yes | Yes |
| DNS Security | – | Yes |
| TLS | – | Yes |
| Subdomain Enumeration | – | Yes |
| Network Scanning | – | Yes |
| Security Scanning | – | Yes |
| Alerting | – | Yes |
| Reconnaissance | – | Yes |
| Visibility | – | Yes |
| Web Security | – | Yes |

### Core features

**Salience xASM**

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

**SurfaceDiff**

9 features 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.

- [SurfaceDiff](https://cybersectools.com/tools/surfacediff) fits if you are a startup.

## Salience xASM vs SurfaceDiff FAQ

Common questions when comparing Salience xASM vs SurfaceDiff for external attack surface management.

### What is the difference between Salience xASM and SurfaceDiff?

**Salience xASM**: XASM platform covering external, internal, and API attack surfaces, built by Humanize Security.

**SurfaceDiff**: Continuous external attack surface monitoring that shows what changed between scans, built by SurfaceDiff.

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

### Who makes Salience xASM and SurfaceDiff?

**Salience xASM** is made by Humanize Security. **SurfaceDiff** is made by SurfaceDiff. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Salience xASM a good alternative to SurfaceDiff?

Often, yes. Salience xASM and SurfaceDiff are both External Attack Surface Management products, and both cover Port Scanning. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Salience xASM vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-salience-xasm)
- [Salience xASM vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-salience-xasm)
- [Salience xASM vs Trickest ASM - Attack Surface Management](https://cybersectools.com/compare/salience-xasm-vs-trickest-asm-attack-surface-management)
- [SurfaceDiff vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-surfacediff)
- [SurfaceDiff vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-surfacediff)
- [SurfaceDiff vs Trickest ASM - Attack Surface Management](https://cybersectools.com/compare/surfacediff-vs-trickest-asm-attack-surface-management)

## Alternatives to each

- [See all Salience xASM alternatives](https://cybersectools.com/alternatives/salience-xasm)
- [See all SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff)

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Source: https://cybersectools.com/compare/salience-xasm-vs-surfacediff

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

More on Salience xASM and SurfaceDiff: 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