# Bitsight External Attack Surface Management vs SurfaceDiff: side-by-side comparison (2026) [Bitsight External Attack Surface Management](https://cybersectools.com/tools/bitsight-external-attack-surface-management) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Bitsight](https://cybersectools.com/companies/bitsight). [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. ## Our take What our shortlists say about the one we picked. ### [Bitsight External Attack Surface Management](https://cybersectools.com/tools/bitsight-external-attack-surface-management) Best for: Teams reporting cyber risk to boards and insurers It earns a place because Bitsight IQ ties each discovered asset to the entity that owns it, and cloud IP addresses sync from AWS, Azure and Google Cloud several times a day. That suits a company with many subsidiaries or suppliers to map. Ask how attribution gets checked, since an asset tied to the wrong entity sends work to the wrong owner. From [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). 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 | | Bitsight 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 | Bitsight | SurfaceDiff | | Headquarters | – | – | ### Use cases and capabilities | | Bitsight External Attack Surface Management | SurfaceDiff | |---|---|---| | 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 **Bitsight 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 **Bitsight External Attack Surface Management** 10 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. ## Bitsight External Attack Surface Management vs SurfaceDiff FAQ Common questions when comparing Bitsight External Attack Surface Management vs SurfaceDiff for external attack surface management. ### What is the difference between Bitsight External Attack Surface Management and SurfaceDiff? **Bitsight External Attack Surface Management**: Discovers assets, analyzes risks, and prioritizes vulnerabilities across orgs, built by Bitsight. **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 Bitsight External Attack Surface Management and SurfaceDiff? **Bitsight External Attack Surface Management** is made by Bitsight. **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 Bitsight External Attack Surface Management a good alternative to SurfaceDiff? Often, yes. Bitsight 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 - [Bitsight External Attack Surface Management vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/bitsight-external-attack-surface-management-vs-ddactic-attack-surface-discovery) - [Bitsight External Attack Surface Management vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-bitsight-external-attack-surface-management) - [Bitsight External Attack Surface Management vs Trickest ASM - Attack Surface Management](https://cybersectools.com/compare/bitsight-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 Bitsight External Attack Surface Management alternatives](https://cybersectools.com/alternatives/bitsight-external-attack-surface-management) - [See all SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff) --- Source: https://cybersectools.com/compare/bitsight-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/bitsight-external-attack-surface-management.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Bitsight 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