# Halo Security Attack Surface Discovery vs SurfaceDiff: side-by-side comparison (2026)

[Halo Security Attack Surface Discovery](https://cybersectools.com/tools/halo-security-attack-surface-discovery) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Halo Security](https://cybersectools.com/companies/halo-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, Mandiant Attack Surface Management and 4 more.

## Side-by-side comparison

| | Halo Security Attack Surface Discovery | 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 | Halo Security | SurfaceDiff |
| Headquarters | – | – |

### Use cases and capabilities

| | Halo Security Attack Surface Discovery | SurfaceDiff |
|---|---|---|
| Network Scanning | Yes | Yes |
| Port Scanning | Yes | Yes |
| Subdomain Enumeration | Yes | Yes |
| DNS Security | – | Yes |
| TLS | – | Yes |
| Security Scanning | – | Yes |
| Alerting | – | Yes |
| Reconnaissance | – | Yes |
| Visibility | – | Yes |
| Web Security | – | Yes |

### Core features

**Halo Security Attack Surface Discovery**

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

**SurfaceDiff**

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

### Integrations

**Halo Security Attack Surface Discovery**

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

**SurfaceDiff**

No integrations listed.

## 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.

## Halo Security Attack Surface Discovery vs SurfaceDiff FAQ

Common questions when comparing Halo Security Attack Surface Discovery vs SurfaceDiff for external attack surface management.

### What is the difference between Halo Security Attack Surface Discovery and SurfaceDiff?

**Halo Security Attack Surface Discovery**: Discovers and inventories internet-facing assets including subdomains, IPs, and apps. Built by Halo 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 Halo Security Attack Surface Discovery and SurfaceDiff?

**Halo Security Attack Surface Discovery** is made by Halo 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 Halo Security Attack Surface Discovery a good alternative to SurfaceDiff?

Often, yes. Halo Security Attack Surface Discovery and SurfaceDiff are both External Attack Surface Management products, and both cover Port Scanning, Subdomain Enumeration, Network Scanning. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Halo Security Attack Surface Discovery vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-halo-security-attack-surface-discovery)
- [Halo Security Attack Surface Discovery vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-halo-security-attack-surface-discovery)
- [Halo Security Attack Surface Discovery vs Trickest ASM - Attack Surface Management](https://cybersectools.com/compare/halo-security-attack-surface-discovery-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 Halo Security Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/halo-security-attack-surface-discovery)
- [See all SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff)

---

Source: https://cybersectools.com/compare/halo-security-attack-surface-discovery-vs-surfacediff

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

More on Halo Security Attack Surface Discovery 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