Best S3BucketList Alternatives & Competitors in 2026

2tearsinabucket

A tool for enumerating and analyzing Amazon S3 buckets associated with specific targets to identify potential security misconfigurations.

FestIn

FestIn discovers open S3 buckets associated with a domain using crawling and DNS reconnaissance techniques.

Cloud_enum

Cloud_enum is a multi-cloud OSINT tool that enumerates publicly accessible resources across AWS, Azure, and Google Cloud platforms for security assessment purposes.

CloudScraper

CloudScraper is an enumeration tool that discovers cloud storage resources including S3 buckets, Azure blobs, and DigitalOcean Spaces across target environments.

ExposeLens

Domain exposure monitoring tool for leaked creds, subdomains & dark web data.

DorkSearch

Curated Google dork search tool for OSINT and web reconnaissance.

crt.sh

Bash script for subdomain enumeration via crt.sh certificate transparency logs.

Smogcloud

A Go-based tool for discovering and inventorying internet-facing AWS assets across single or multiple accounts to help maintain comprehensive cloud attack surface visibility.

CloudBrute

A black-box reconnaissance tool that discovers cloud infrastructure, files, and applications across major cloud providers for security testing purposes.

aws_public_ips

A Ruby-based tool that enumerates all public IPv4 and IPv6 addresses associated with an AWS account across multiple services including EC2, CloudFront, ELB, RDS, and others.

censys-enumeration

A script to extract subdomains/emails for a given domain using SSL/TLS certificate dataset on Censys.

assetfinder

A command-line tool for discovering domains and subdomains related to a target domain during reconnaissance activities.

ScanCannon

A Python-based tool for external attack surface discovery and reconnaissance across large-scale networks, focusing on IP address and subdomain enumeration.

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.

Censys Internet Map

Internet intelligence platform for asset discovery and attack surface mapping

Intruder Attack Surface Management

Attack surface mgmt platform with vuln scanning and cloud security features

Matos Automated Attack Surface Management

Automated ASM tool for multi-cloud environments with continuous asset discovery

Palo Alto Networks Cortex Xpanse

Active attack surface mgmt solution for discovering & remediating unknown risks

Zerocopter Recon

External attack surface mapping service to discover exposed digital assets

ConnectSecure Attack Surface Scanning

External attack surface scanning for MSPs to identify vulnerabilities

Aleph Search Clear

OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web.

Cobalt Attack Surface Monitoring

Continuous external asset discovery and monitoring with daily domain scans.

Muscope|Risk - Attack Perimeter

Maps external attack surface including assets, dark web exposure, and leaks.

Qontrol Avant-Vente

Passive pre-sale domain diagnostic tool for vCISOs, MSPs & MSSPs.

Vulneri ASM

ASM platform for continuous discovery and risk validation of internet-exposed assets.

Cylana EASM

AI-powered EASM platform for digital asset discovery and monitoring.

Attaxion

Agentless EASM platform for asset discovery, exposure mgmt & risk reduction.

Threat Surface - Attack Surface Management

EASM platform for continuous discovery and risk assessment of external assets.

ZoomEye

ZoomEye is an advanced cyberspace search engine that provides detailed information on cyberspace assets, including server software and version information, for cybersecurity experts, researchers, and enterprises.

Findomain

A domain reconnaissance tool that automates subdomain discovery, port scanning, and monitoring with support for multiple data sources and notification integrations.

Majestic Million

Explore the top million websites, ranked by referring subnets, and gain insights into online influence and popularity.

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.

FullHunt

FullHunt is a next-generation attack surface security platform that enables companies to discover, monitor, and secure their external attack surfaces.

Wappalyzer

A technology lookup and lead generation tool that identifies the technology stack of any website and provides features for market research, competitor analysis, and data enrichment.

PublicWWW

A source code search engine for searching alphanumeric snippets, signatures, or keywords in web page HTML, JS, and CSS code.

Amass

Amass is an open-source OWASP tool for comprehensive attack surface mapping and asset discovery through domain reconnaissance and subdomain enumeration.

AttackSurfaceMapper

Automate your reconnaissance process with AttackSurfaceMapper, a tool for mapping and analyzing network attack surfaces.

WitnessMe

Web inventory tool that captures screenshots of webpages and includes additional features for enhanced usability.

Censys Python Library

An easy-to-use and lightweight API wrapper for Censys APIs with support for Python 3.8+.

Recon-ng Framework

A full-featured reconnaissance framework for web-based reconnaissance with a modular design.

Perimeterator

A distributed AWS security auditing tool that continuously enumerates and scans internet-facing AWS services to identify potentially misconfigured resources.

massdns

A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)

Chaos Client

A Go client to communicate with Chaos DB API

altdns

A tool for generating permutations, alterations and mutations of subdomains and resolving them

brutesubs

An automation framework that runs multiple open-source subdomain bruteforcing tools in parallel using Docker Compose and custom wordlists.

Knock

A subdomain scan tool that helps you find subdomains of a given domain.

Webanalyze

An automated tool for identifying technologies used on websites with mass scanning capabilities, based on the Wappalyzer detection engine.

python-builtwith

A Python API client for BuiltWith that enables programmatic access to website technology profiling and reconnaissance data.