GrayHatWarfare Buckets is a free external attack surface management solution. Microsoft Defender EASM is a commercial external attack surface management solution by Microsoft. Features, integrations, deployment and the company behind each one, side by side.
What our shortlists say about the one we picked.
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, Fall 2026
Reviewed by Nika (Nikoloz) Kokhreidze.
A search engine for open Amazon S3 buckets and their contents, allowing users to search for files using keywords, filename extensions, and full path.
Discovers and monitors external-facing assets and vulnerabilities
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Based on what each listing shows: deployment, company size, price and open source.
GrayHatWarfare Buckets fits if you need a free product.
Common questions when comparing GrayHatWarfare Buckets vs Microsoft Defender EASM for external attack surface management.
GrayHatWarfare Buckets: A search engine for open Amazon S3 buckets and their contents, allowing users to search for files using keywords, filename extensions, and full path.
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.
Often, yes. GrayHatWarfare Buckets and Microsoft Defender EASM are both External Attack Surface Management products. Key differences: GrayHatWarfare Buckets is Free while Microsoft Defender EASM is Commercial. Use the table above to see where features, deployment and company size fit differ.
Need the answer fast? Best Attack Surface Management Solutions for Business picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Mandiant Attack Surface Management and 4 more.See the shortlist