# Cyber Exposure Manager vs s3viewer: side-by-side comparison (2026) [Cyber Exposure Manager](https://cybersectools.com/tools/galileo-security) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Galileo Security](https://cybersectools.com/companies/galileo-security). [s3viewer](https://cybersectools.com/tools/s3viewer) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. Features, integrations, deployment and the company behind each one, side by side. 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 | | Cyber Exposure Manager | s3viewer | |---|---|---| | Pricing model | Commercial | Free | | Category | External Attack Surface Management | External Attack Surface Management | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise, Startup | SMB, Mid-Market, Enterprise | | GitHub stars | – | 448 | | Last commit | – | Jul 2023 | | Company | Galileo Security | – | | Headquarters | – | – | ### Use cases and capabilities | | Cyber Exposure Manager | s3viewer | |---|---|---| | Vulnerability Prioritization | Yes | – | | Cyber Threat Intelligence | Yes | – | | Threat Management | Yes | – | | CVE | Yes | – | | Misconfiguration | Yes | Yes | | Secret Detection | Yes | – | | REST API | Yes | – | | Digital Risk Protection | Yes | – | | Azure | – | Yes | | S3 | – | Yes | | AWS | – | Yes | ### Core features **Cyber Exposure Manager** 10 features listed. Sign in on the page to see them. **s3viewer** No features listed. ### Integrations **Cyber Exposure Manager** 3 integrations listed. Sign in on the page to see them. **s3viewer** No integrations listed. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Cyber Exposure Manager](https://cybersectools.com/tools/galileo-security) fits if you are a startup. - [s3viewer](https://cybersectools.com/tools/s3viewer) fits if you need a free product and you want an open-source product. ## Cyber Exposure Manager vs s3viewer FAQ Common questions when comparing Cyber Exposure Manager vs s3viewer for external attack surface management. ### What is the difference between Cyber Exposure Manager and s3viewer? **Cyber Exposure Manager**: Cyber Exposure Manager: continuous visibility and remediation for external risk. Built by Galileo Security. **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. ### Who makes Cyber Exposure Manager and s3viewer? **Cyber Exposure Manager** is made by Galileo Security founded in 2025-01-01T00:00:00.000Z. **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. ### Is Cyber Exposure Manager a good alternative to s3viewer? Often, yes. Cyber Exposure Manager and s3viewer are both External Attack Surface Management products, and both cover Misconfiguration. Key differences: Cyber Exposure Manager is Commercial while s3viewer is Free, s3viewer is open-source. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Cyber Exposure Manager vs FalconTech Threat Hunter](https://cybersectools.com/compare/falcontech-threat-hunter-vs-galileo-security) - [Cyber Exposure Manager vs GuardEon](https://cybersectools.com/compare/galileo-security-vs-guardeon) - [Cyber Exposure Manager vs Intruder Attack Surface Management](https://cybersectools.com/compare/galileo-security-vs-intruder-attack-surface-management) - [s3viewer vs FalconTech Threat Hunter](https://cybersectools.com/compare/falcontech-threat-hunter-vs-s3viewer) - [s3viewer vs GuardEon](https://cybersectools.com/compare/guardeon-vs-s3viewer) - [s3viewer vs Intruder Attack Surface Management](https://cybersectools.com/compare/intruder-attack-surface-management-vs-s3viewer) ## Alternatives to each - [See all Cyber Exposure Manager alternatives](https://cybersectools.com/alternatives/galileo-security) - [See all s3viewer alternatives](https://cybersectools.com/alternatives/s3viewer) --- Source: https://cybersectools.com/compare/galileo-security-vs-s3viewer For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/galileo-security.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Cyber Exposure Manager and s3viewer: 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