CyCognito EASM Platform is a commercial external attack surface management solution by CyCognito. s3viewer is a free external attack surface management solution. Features, integrations, deployment and the company behind each one, side by side.
What our shortlists say about the one we picked.
Best for: Teams wanting discovery plus active testing
It earns a place because discovery and active testing come in one product, so findings arrive already checked and not as a raw asset list. That suits mid-market and enterprise teams that want proof before they assign work. Testing live assets needs their owners on board, so settle scan cadence and scope before you turn it on.
From Best Attack Surface Management Solutions for Business, Fall 2026
Reviewed by Nika (Nikoloz) Kokhreidze.
EASM platform that discovers, attributes, and actively validates external assets and risks
A storage exploration tool that provides unified access to view publicly accessible Amazon S3 buckets, Azure Blob storage, FTP servers, and HTTP directory listings.
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Based on what each listing shows: deployment, company size, price and open source.
s3viewer fits if you are a small business, you need a free product and you want an open-source product.
Common questions when comparing CyCognito EASM Platform vs s3viewer for external attack surface management.
CyCognito EASM Platform: EASM platform that discovers, attributes, and actively validates external assets and risks. Built by CyCognito.
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.
The table above shows where their features, integrations, deployment and company size fit differ.
CyCognito EASM Platform is made by CyCognito. s3viewer is open-source with 448 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. CyCognito EASM Platform and s3viewer are both External Attack Surface Management products. Key differences: CyCognito EASM Platform is Commercial while s3viewer is Free, s3viewer is open-source. 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
