s3viewer vs Siemba EASM: side-by-side comparison (2026)

s3viewer: A storage exploration tool that provides unified access to view publicly accessible Amazon S3 buckets, Azure Blob storage, FTP servers, and HTTP directory listings.

Siemba EASM: AI-driven EASM platform for discovering and monitoring external-facing assets. Built by Siemba.

The table above shows where their features, integrations, deployment and company size fit differ.

s3viewer is open-source with 448 GitHub stars. Siemba EASM is made by Siemba. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. s3viewer and Siemba EASM are both External Attack Surface Management products, and both cover Misconfiguration. Key differences: s3viewer is Free while Siemba EASM is Commercial, s3viewer is open-source. Use the table above to see where features, deployment and company size fit differ.