# SurfaceDiff vs TrustFour T4 - Detect: side-by-side comparison (2026)

[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). [TrustFour T4 - Detect](https://cybersectools.com/tools/trustfour-t4-detect) is a commercial [cyber asset attack surface management](https://cybersectools.com/categories/caasm) solution by [TrustFour](https://cybersectools.com/companies/trustfour). 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

| | SurfaceDiff | TrustFour T4 - Detect |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | External Attack Surface Management | Cyber Asset Attack Surface Management |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | SurfaceDiff | TrustFour |
| Headquarters | – | – |

### Use cases and capabilities

| | SurfaceDiff | TrustFour T4 - Detect |
|---|---|---|
| DNS Security | Yes | – |
| Port Scanning | Yes | – |
| TLS | Yes | Yes |
| Subdomain Enumeration | Yes | – |
| Network Scanning | Yes | Yes |
| Security Scanning | Yes | – |
| Alerting | Yes | – |
| Reconnaissance | Yes | – |
| Visibility | Yes | Yes |
| Web Security | Yes | – |
| NIST | – | Yes |
| Non-Human Identity | – | Yes |
| Workload Security | – | Yes |
| Quantum Safe | – | Yes |
| Lateral Movement | – | Yes |
| Attack Detection | – | Yes |
| Network Monitoring | – | Yes |

### Core features

**SurfaceDiff**

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

**TrustFour T4 - Detect**

8 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 or a small business.

## SurfaceDiff vs TrustFour T4 - Detect FAQ

Common questions when comparing SurfaceDiff vs TrustFour T4 - Detect for external attack surface management.

### What is the difference between SurfaceDiff and TrustFour T4 - Detect?

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

**TrustFour T4 - Detect**: Workload attack surface visibility tool for TLS compliance & NHI assessment, built by TrustFour.

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

### Who makes SurfaceDiff and TrustFour T4 - Detect?

**SurfaceDiff** is made by SurfaceDiff. **TrustFour T4 - Detect** is made by TrustFour. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is SurfaceDiff a good alternative to TrustFour T4 - Detect?

In part. SurfaceDiff and TrustFour T4 - Detect are not in the same category on CybersecTools. Both cover TLS, Network Scanning, Visibility. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [SurfaceDiff vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-surfacediff)
- [SurfaceDiff vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-surfacediff)
- [SurfaceDiff vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-surfacediff)
- [TrustFour T4 - Detect vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-trustfour-t4-detect)
- [TrustFour T4 - Detect vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-trustfour-t4-detect)
- [TrustFour T4 - Detect vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-trustfour-t4-detect)

## Alternatives to each

- [See all SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff)
- [See all TrustFour T4 - Detect alternatives](https://cybersectools.com/alternatives/trustfour-t4-detect)

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Source: https://cybersectools.com/compare/surfacediff-vs-trustfour-t4-detect

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

More on SurfaceDiff and TrustFour T4 - Detect: 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