# S3BucketList

S3BucketList is an External Attack Surface Management product. It runs in the cloud. Pricing is free.

A Chrome extension that automatically detects and lists Amazon S3 buckets while browsing websites.

Checked October 2026.

## What is S3BucketList?

S3BucketList is a Chrome browser extension designed to identify and list Amazon S3 buckets encountered during web browsing sessions.

The extension operates by monitoring web traffic and detecting references to S3 bucket URLs as users navigate through websites. When S3 buckets are identified, the tool compiles them into a list for review and analysis.

This functionality enables security professionals and researchers to discover S3 buckets that may be referenced or embedded within web applications, potentially revealing cloud storage resources that could be misconfigured or publicly accessible.

The tool integrates directly into the Chrome browser interface, providing real-time detection capabilities without requiring separate applications or manual URL analysis.

Tags: Enumeration, Browser Security, Reconnaissance, S3, AWS

## Where it fits in your security program (NIST CSF 2.0)

- [Identify](https://cybersectools.com/guides/building-identify-program-small-team): helps you know your assets and your risks.
- [Detect](https://cybersectools.com/guides/building-detect-program-small-team): helps you spot attacks and unusual activity.

## Quick facts

- Category: [Exposure & Vulnerability Management](https://cybersectools.com/categories/exposure-vulnerability-management) · [External Attack Surface Management](https://cybersectools.com/categories/external-asm)
- Deployment: Cloud
- Company size fit: Startup, SMB, Mid-Market, Enterprise
- Pricing model: Free
- GitHub stars: 124
- Website: github.com

## Where it ranks

S3BucketList is not a pick on the current [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions).

## S3BucketList FAQ

### What is S3BucketList?

S3BucketList is a product in the External Attack Surface Management category. It covers Enumeration, Browser Security and Reconnaissance.

### What is the pricing for S3BucketList?

S3BucketList is free. Download and setup instructions are at https://github.com/AlecBlance/S3BucketList/.

### What are alternatives to S3BucketList?

Alternatives to S3BucketList listed on CybersecTools:

1. [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) - Fast Certificate Transparency search and JSON API for subdomain reconnaissance. (Commercial)
2. [Censys Attack Surface Management](https://cybersectools.com/tools/censys-attack-surface-management) - Internet intelligence platform for asset discovery and attack surface mapping (Commercial)
3. [Intruder Attack Surface Management](https://cybersectools.com/tools/intruder-attack-surface-management) - Attack surface mgmt platform with vuln scanning and cloud security features (Commercial)
4. [Matos Automated Attack Surface Management](https://cybersectools.com/tools/cloudmatos-automated-attack-surface-management) - Automated ASM tool for multi-cloud environments with continuous asset discovery (Commercial)
5. [Palo Alto Networks Cortex Xpanse](https://cybersectools.com/tools/palo-alto-networks-cortex-xpanse) - Active attack surface mgmt solution for discovering & remediating unknown risks (Commercial)

Compare all S3BucketList alternatives at [https://cybersectools.com/alternatives/s3bucketlist](https://cybersectools.com/alternatives/s3bucketlist)

### What deployment and organization size does S3BucketList fit?

S3BucketList is available as a cloud service. It is listed for startups, small businesses, mid-market companies and enterprises. It is free.

## Compare S3BucketList with similar solutions

- [S3BucketList vs ctlogs.dev](https://cybersectools.com/compare/ctlogsdev-vs-s3bucketlist)
- [S3BucketList vs Censys Attack Surface Management](https://cybersectools.com/compare/censys-attack-surface-management-vs-s3bucketlist)
- [S3BucketList vs Intruder Attack Surface Management](https://cybersectools.com/compare/intruder-attack-surface-management-vs-s3bucketlist)

All alternatives to S3BucketList: [/alternatives/s3bucketlist](https://cybersectools.com/alternatives/s3bucketlist)

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Source: https://cybersectools.com/tools/s3bucketlist

For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any compare page has a Markdown copy too (add .md to its URL).

More on S3BucketList: 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=product-md