# Microsoft Defender EASM vs Synack Attack Surface Discovery: side-by-side comparison (2026) [Microsoft Defender EASM](https://cybersectools.com/tools/microsoft-defender-external-attack-surface-management) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Microsoft](https://cybersectools.com/companies/microsoft). [Synack Attack Surface Discovery](https://cybersectools.com/tools/synack-attack-surface-discovery) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Synack](https://cybersectools.com/companies/synack). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Microsoft Defender EASM](https://cybersectools.com/tools/microsoft-defender-external-attack-surface-management) Best for: Microsoft shops adding external asset discovery It belongs here if you already pay for Microsoft security, because discovered assets can move into Defender for Cloud and Copilot in Azure turns plain questions into inventory searches. It fits companies from small to enterprise. Its features center on discovery and flagging, so ask whether you also need active testing to prove which exposures are real. 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 | | Microsoft Defender EASM | Synack Attack Surface Discovery | |---|---|---| | 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 | Mid-Market, Enterprise | | Company | Microsoft | Synack | | Headquarters | – | – | ### Use cases and capabilities | | Microsoft Defender EASM | Synack Attack Surface Discovery | |---|---|---| | RBAC | – | Yes | ### Core features **Microsoft Defender EASM** 10 features listed. Sign in on the page to see them. **Synack Attack Surface Discovery** 10 features listed. Sign in on the page to see them. ### Integrations **Microsoft Defender EASM** 4 integrations listed. Sign in on the page to see them. **Synack Attack Surface Discovery** 5 integrations 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. - [Microsoft Defender EASM](https://cybersectools.com/tools/microsoft-defender-external-attack-surface-management) fits if you are a small business. ## Microsoft Defender EASM vs Synack Attack Surface Discovery FAQ Common questions when comparing Microsoft Defender EASM vs Synack Attack Surface Discovery for external attack surface management. ### What is the difference between Microsoft Defender EASM and Synack Attack Surface Discovery? **Microsoft Defender EASM**: Discovers and monitors external-facing assets and vulnerabilities. Built by Microsoft. **Synack Attack Surface Discovery**: External attack surface mgmt with asset discovery and on-demand pentesting. Built by Synack. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Microsoft Defender EASM and Synack Attack Surface Discovery? **Microsoft Defender EASM** is made by Microsoft. **Synack Attack Surface Discovery** is made by Synack. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Microsoft Defender EASM a good alternative to Synack Attack Surface Discovery? Often, yes. Microsoft Defender EASM and Synack Attack Surface Discovery are both External Attack Surface Management products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Microsoft Defender EASM vs Mandiant Attack Surface Management](https://cybersectools.com/compare/mandiant-attack-surface-management-vs-microsoft-defender-external-attack-surface-management) - [Microsoft Defender EASM vs DNS Assistant](https://cybersectools.com/compare/dns-assistant-vs-microsoft-defender-external-attack-surface-management) - [Microsoft Defender EASM vs Outpost24 External Attack Surface Management](https://cybersectools.com/compare/microsoft-defender-external-attack-surface-management-vs-outpost24-external-attack-surface-management) - [Synack Attack Surface Discovery vs Mandiant Attack Surface Management](https://cybersectools.com/compare/mandiant-attack-surface-management-vs-synack-attack-surface-discovery) - [Synack Attack Surface Discovery vs DNS Assistant](https://cybersectools.com/compare/dns-assistant-vs-synack-attack-surface-discovery) - [Synack Attack Surface Discovery vs Outpost24 External Attack Surface Management](https://cybersectools.com/compare/outpost24-external-attack-surface-management-vs-synack-attack-surface-discovery) ## Alternatives to each - [See all Microsoft Defender EASM alternatives](https://cybersectools.com/alternatives/microsoft-defender-external-attack-surface-management) - [See all Synack Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/synack-attack-surface-discovery) --- Source: https://cybersectools.com/compare/microsoft-defender-external-attack-surface-management-vs-synack-attack-surface-discovery For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/microsoft-defender-external-attack-surface-management.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Microsoft Defender EASM and Synack Attack Surface Discovery: 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