# QuimeraX External Attack Surface Management vs SurfaceDiff: side-by-side comparison (2026) [QuimeraX External Attack Surface Management](https://cybersectools.com/tools/quimerax-external-attack-surface-management) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [QuimeraX](https://cybersectools.com/companies/quimerax). [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 | | QuimeraX External Attack Surface Management | 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 | QuimeraX | SurfaceDiff | | Headquarters | – | – | ### Use cases and capabilities | | QuimeraX External Attack Surface Management | SurfaceDiff | |---|---|---| | Dark Web Monitoring | Yes | – | | DNS Security | – | Yes | | Port Scanning | – | Yes | | TLS | – | Yes | | Subdomain Enumeration | – | Yes | | Network Scanning | – | Yes | | Security Scanning | – | Yes | | Alerting | – | Yes | | Reconnaissance | – | Yes | | Visibility | – | Yes | | Web Security | – | Yes | ### Core features **QuimeraX External Attack Surface Management** 10 features listed. Sign in on the page to see them. **SurfaceDiff** 9 features listed. Sign in on the page to see them. ### Integrations **QuimeraX External Attack Surface Management** 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. ## QuimeraX External Attack Surface Management vs SurfaceDiff FAQ Common questions when comparing QuimeraX External Attack Surface Management vs SurfaceDiff for external attack surface management. ### What is the difference between QuimeraX External Attack Surface Management and SurfaceDiff? **QuimeraX External Attack Surface Management**: EASM platform for continuous monitoring of internet-exposed assets & vulnerabilities, built by QuimeraX. **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 QuimeraX External Attack Surface Management and SurfaceDiff? **QuimeraX External Attack Surface Management** is made by QuimeraX. **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 QuimeraX External Attack Surface Management a good alternative to SurfaceDiff? Often, yes. QuimeraX External Attack Surface Management and SurfaceDiff are both External Attack Surface Management products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [QuimeraX External Attack Surface Management vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-quimerax-external-attack-surface-management) - [QuimeraX External Attack Surface Management vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-quimerax-external-attack-surface-management) - [QuimeraX External Attack Surface Management vs Trickest ASM - Attack Surface Management](https://cybersectools.com/compare/quimerax-external-attack-surface-management-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 QuimeraX External Attack Surface Management alternatives](https://cybersectools.com/alternatives/quimerax-external-attack-surface-management) - [See all SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff) --- Source: https://cybersectools.com/compare/quimerax-external-attack-surface-management-vs-surfacediff For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/quimerax-external-attack-surface-management.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on QuimeraX External Attack Surface Management 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