# DDactic Attack Surface Discovery vs Microsoft Defender EASM: side-by-side comparison (2026) [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [DDactic](https://cybersectools.com/companies/ddactic). [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). 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 | | DDactic Attack Surface Discovery | Microsoft Defender EASM | |---|---|---| | Pricing model | Commercial | Commercial | | Category | External Attack Surface Management | External Attack Surface Management | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | DDactic | Microsoft | | Headquarters | – | – | ### Use cases and capabilities | | DDactic Attack Surface Discovery | Microsoft Defender EASM | |---|---|---| | Subdomain Enumeration | Yes | – | | Vulnerability | Yes | – | | DDoS | Yes | – | | DNS Security | Yes | – | | Network Scanning | Yes | – | | Security Scanning | Yes | – | | Port Scanning | Yes | – | | SSL | Yes | – | | Data Breach | Yes | – | | Reconnaissance | Yes | – | ### Core features **DDactic Attack Surface Discovery** 10 features listed. Sign in on the page to see them. **Microsoft Defender EASM** 10 features listed. Sign in on the page to see them. ### Integrations **DDactic Attack Surface Discovery** 12 integrations listed. Sign in on the page to see them. **Microsoft Defender EASM** 4 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. - [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) fits if you are a startup. ## DDactic Attack Surface Discovery vs Microsoft Defender EASM FAQ Common questions when comparing DDactic Attack Surface Discovery vs Microsoft Defender EASM for external attack surface management. ### What is the difference between DDactic Attack Surface Discovery and Microsoft Defender EASM? **DDactic Attack Surface Discovery**: Scans domains to discover attack surface, vulnerabilities, and generate hardening, built by DDactic. **Microsoft Defender EASM**: Discovers and monitors external-facing assets and vulnerabilities, built by Microsoft. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes DDactic Attack Surface Discovery and Microsoft Defender EASM? **DDactic Attack Surface Discovery** is made by DDactic founded in 2026-01-01T00:00:00.000Z. **Microsoft Defender EASM** is made by Microsoft. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is DDactic Attack Surface Discovery a good alternative to Microsoft Defender EASM? Often, yes. DDactic Attack Surface Discovery and Microsoft Defender EASM are both External Attack Surface Management products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [DDactic Attack Surface Discovery vs SurfaceDiff](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-surfacediff) - [DDactic Attack Surface Discovery vs MGM Security Partners recon me](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-mgm-security-partners-recon-me) - [DDactic Attack Surface Discovery vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-ddactic-attack-surface-discovery) - [Microsoft Defender EASM vs SurfaceDiff](https://cybersectools.com/compare/microsoft-defender-external-attack-surface-management-vs-surfacediff) - [Microsoft Defender EASM vs MGM Security Partners recon me](https://cybersectools.com/compare/mgm-security-partners-recon-me-vs-microsoft-defender-external-attack-surface-management) - [Microsoft Defender EASM vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-microsoft-defender-external-attack-surface-management) ## Alternatives to each - [See all DDactic Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/ddactic-attack-surface-discovery) - [See all Microsoft Defender EASM alternatives](https://cybersectools.com/alternatives/microsoft-defender-external-attack-surface-management) --- Source: https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-microsoft-defender-external-attack-surface-management For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/ddactic-attack-surface-discovery.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on DDactic Attack Surface Discovery and Microsoft Defender EASM: 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