The product
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 closest s3viewer alternatives are ctlogs.dev, Intruder Attack Surface Management and Siemba EASM. Picking a s3viewer alternative comes down to fit: External Attack Surface Management coverage, your environment, your integrations and your budget. So each option below shows what it covers, how it deploys, its pricing model and the company behind it.
46 alternativesClosest matches: ctlogs.dev, Intruder Attack Surface Management, Siemba EASMPage updated Nov 2026
The product
A storage exploration tool that provides unified access to view publicly accessible Amazon S3 buckets, Azure Blob storage, FTP servers, and HTTP directory listings.
s3viewer is a free External Attack Surface Management solution. The closest matches by shared tags and NIST CSF 2.0 coverage are ctlogs.dev, Intruder Attack Surface Management, Siemba EASM, CyberXTron ShadowSpot, and GoSecure Titan® Attack Surface Management. All 46 alternatives on this page are ranked the same way.
These 8 solutions overlap most with s3viewer. Each row says what the product does and, when the overlap is big enough, which capabilities it shares.
Fast Certificate Transparency search and JSON API for subdomain reconnaissance.
Key features: Real-time Certificate Transparency Search, Automated Subdomain Enumeration, High-Performance REST JSON API, Wildcard & Fingerprint Matching, SSL/TLS Certificate History Tracking
View ctlogs.devctlogs.dev alternativess3viewer vs ctlogs.dev
Attack surface mgmt platform with vuln scanning and cloud security features
Key features: 10 listed. See them on the Intruder Attack Surface Management page.
View Intruder Attack Surface ManagementIntruder Attack Surface Management alternativess3viewer vs Intruder Attack Surface Management
AI-driven EASM platform for discovering and monitoring external-facing assets
Key features: 10 listed. See them on the Siemba EASM page.
View Siemba EASMSiemba EASM alternativess3viewer vs Siemba EASM
External attack surface management platform for asset discovery and risk detection
Key features: 10 listed. See them on the CyberXTron ShadowSpot page.
View CyberXTron ShadowSpotCyberXTron ShadowSpot alternativess3viewer vs CyberXTron ShadowSpot
Discovers, monitors, and assesses external attack surface assets continuously.
Key features: 7 listed. See them on the GoSecure Titan® Attack Surface Management page.
View GoSecure Titan® Attack Surface ManagementGoSecure Titan® Attack Surface Management alternativess3viewer vs GoSecure Titan® Attack Surface Management
Platform for continuous attack surface discovery, monitoring, and remediation
Key features: 8 listed. See them on the Strobes Attack Surface Management page.
View Strobes Attack Surface ManagementStrobes Attack Surface Management alternativess3viewer vs Strobes Attack Surface Management
External attack surface management platform for asset discovery and monitoring
Key features: 10 listed. See them on the Edgescan Attack Surface Management (ASM) page.
View Edgescan Attack Surface Management (ASM)Edgescan Attack Surface Management (ASM) alternativess3viewer vs Edgescan Attack Surface Management (ASM)
AI-powered EASM platform for discovering and prioritizing external risks
Key features: 10 listed. See them on the RiskProfiler - Attack Surface Management page.
View RiskProfiler - Attack Surface ManagementRiskProfiler - Attack Surface Management alternativess3viewer vs RiskProfiler - Attack Surface Management
Fast Certificate Transparency search and JSON API for subdomain reconnaissance.
Attack surface mgmt platform with vuln scanning and cloud security features
AI-driven EASM platform for discovering and monitoring external-facing assets
External attack surface management platform for asset discovery and risk detection
Discovers, monitors, and assesses external attack surface assets continuously.
Platform for continuous attack surface discovery, monitoring, and remediation
External attack surface management platform for asset discovery and monitoring
AI-powered EASM platform for discovering and prioritizing external risks
Cyber Exposure Manager: continuous visibility and remediation for external risk
ASM platform for continuous discovery and risk validation of internet-exposed assets.
ASM platform monitoring external attack surface, dark web leaks & 3rd-party risks.
Monitors internet-facing subdomains for vulnerabilities and misconfigurations
EASM platform for continuous external attack surface monitoring and detection
DNS posture mgmt platform for real-time DNS & WHOIS change monitoring.
Cloud platform for continuous visibility & mgmt of external attack surfaces
AI-powered attack surface management platform for cybersecurity monitoring
AI-powered platform for continuous attack surface discovery and pentesting
Discovers and monitors external-facing assets and vulnerabilities
External attack surface mgmt platform for discovering & monitoring assets
External attack surface management platform with continuous asset discovery
External attack surface management platform for discovering digital assets
Internet intelligence platform for asset discovery and attack surface mapping
SaaS platform for attack surface management and vulnerability detection
EASM platform for continuous monitoring of internet-exposed assets & vulnerabilities
Supply chain intelligence platform mapping digital ecosystems & proximity risks
Attack surface management platform for monitoring vulnerabilities and breaches
Discovers and manages internet-facing assets with vulnerability prioritization
ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web.
External attack surface mgmt with automated pentesting and validation
SOCRadar Attack Surface Management is an EASM platform that continuously discovers, monitors, and assesses internet-facing digital assets for vulnerabilities and security risks.
Automated ASM tool for multi-cloud environments with continuous asset discovery
External attack surface mgmt with asset discovery and on-demand pentesting
Active attack surface mgmt solution for discovering & remediating unknown risks
Passive asset discovery platform using Netflow data for attack surface mapping
External attack surface management platform for asset discovery and vuln mgmt
EASM platform with integrated CTI for asset discovery and vulnerability mgmt
Cytrusst ASM is an attack surface management product that helps discover an organization's
Agentless API attack surface discovery and vulnerability detection platform
Continuous discovery, monitoring, and testing of external assets and exposures
EASM platform with continuous asset discovery and threat intelligence context
LLM-powered security platform for finding and fixing security gaps
Customizable ASM platform for asset discovery, monitoring, and enrichment
Internet-connected asset search engine with vulnerability scanning capabilities
Attack surface asset classification and contextualization platform
Common questions when weighing alternatives to s3viewer.
The closest matches to s3viewer by shared tags and NIST CSF 2.0 coverage are ctlogs.dev, Intruder Attack Surface Management, Siemba EASM, CyberXTron ShadowSpot, and GoSecure Titan® Attack Surface Management. All of them are External Attack Surface Management products.
This page shows 46 alternatives to s3viewer, all in the External Attack Surface Management category. Each one is matched on shared tags and NIST CSF 2.0 areas, and the closest matches rank first.
s3viewer is a free External Attack Surface Management product. You can use it at no cost. Only commercial alternatives are listed here. Free and open source products are under /free.
s3viewer is a External Attack Surface Management product in the Exposure & Vulnerability Management category. You can compare it with the 46 other External Attack Surface Management products on this page.
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
