# SurfaceDiff

SurfaceDiff is an External Attack Surface Management product by SurfaceDiff. It runs in the cloud. Pricing is commercial.

Continuous external attack surface monitoring that shows what changed between scans.

Checked October 2026.

## What is SurfaceDiff?

SurfaceDiff is a continuous external attack surface monitoring platform for domains you own or are authorized to manage. It observes publicly exposed infrastructure, stores each scan as a snapshot, and shows what changed between scans.

Key capabilities:

* Baseline scan of a domain's publicly exposed assets
* Scheduled monitoring and automatic change detection
* Discovery and tracking of subdomains, DNS records, open ports, TLS certificates and web services
* Incidents with supporting evidence and change history
* Drift analysis and comparison of historical snapshots
* Evidence Center with signed PDF reports documenting the observed state
* Domain ownership verification via DNS record or server file

SurfaceDiff is not a conventional vulnerability scanner. Its primary purpose is to help infrastructure, DevOps and security teams identify changes in public exposure and determine whether those changes were expected and authorized.

The Free Plan includes one verified domain and one scheduled scan per day with no time limit. No payment card is required. Users create an account, add a domain, verify ownership and run the first scan to establish the initial baseline.

Tags: DNS Security, Port Scanning, TLS, Subdomain Enumeration, Network Scanning, Security Scanning, Alerting, Reconnaissance, Visibility, Web Security

## Where it fits in your security program (NIST CSF 2.0)

- [Identify](https://cybersectools.com/guides/building-identify-program-small-team): helps you know your assets and your risks.
- [Detect](https://cybersectools.com/guides/building-detect-program-small-team): helps you spot attacks and unusual activity.

## Quick facts

- Category: [Exposure & Vulnerability Management](https://cybersectools.com/categories/exposure-vulnerability-management) · [External Attack Surface Management](https://cybersectools.com/categories/external-asm)
- Vendor: [SurfaceDiff](https://cybersectools.com/companies/surfacediff) (Claimed listing)
- Deployment: Cloud
- Company size fit: Startup, SMB, Mid-Market, Enterprise
- Pricing: From $19 per month
- Features: 9 listed
- Website: surfacediff.com

The full feature and integration lists are on the page for signed-in visitors.

## Where it ranks

SurfaceDiff is not a pick on the current [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions).

## SurfaceDiff FAQ

### What is SurfaceDiff?

SurfaceDiff is a product by SurfaceDiff in the External Attack Surface Management category. It covers DNS Security, Port Scanning and TLS.

### What is the pricing for SurfaceDiff?

SurfaceDiff is a commercial product. For pricing, visit https://surfacediff.com/ or contact SurfaceDiff.

### What are alternatives to SurfaceDiff?

Alternatives to SurfaceDiff listed on CybersecTools:

1. [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) - Fast Certificate Transparency search and JSON API for subdomain reconnaissance. (Commercial)
2. [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) - Scans domains to discover attack surface, vulnerabilities, and generate hardening (Commercial)
3. [Attack Surface Scan](https://cybersectools.com/tools/attack-surface-scan) - Agentless external attack surface monitoring with continuous change detection. (Commercial)
4. [Trickest ASM - Attack Surface Management](https://cybersectools.com/tools/trickest-asm-attack-surface-management) - Customizable ASM platform for asset discovery, monitoring, and enrichment (Commercial)
5. [Cylana EASM](https://cybersectools.com/tools/cylana-easm) - AI-powered EASM platform for digital asset discovery and monitoring. (Commercial)

Compare all SurfaceDiff alternatives at [https://cybersectools.com/alternatives/surfacediff](https://cybersectools.com/alternatives/surfacediff)

### What deployment and organization size does SurfaceDiff fit?

SurfaceDiff is available as a cloud service. It is listed for startups, small businesses, mid-market companies and enterprises. Pricing is commercial. Ask SurfaceDiff for pricing and support terms.

## Compare SurfaceDiff with similar solutions

- [SurfaceDiff vs ctlogs.dev](https://cybersectools.com/compare/ctlogsdev-vs-surfacediff)
- [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)

All alternatives to SurfaceDiff: [/alternatives/surfacediff](https://cybersectools.com/alternatives/surfacediff)

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Source: https://cybersectools.com/tools/surfacediff

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More on SurfaceDiff 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=product-md