The product
Fast passive subdomain enumeration tool
The closest Subfinder alternatives are ctlogs.dev, Detectify Platform and Detectify Surface Monitoring. Picking a Subfinder 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.
Closest 48 alternatives shownClosest matches: ctlogs.dev, Detectify Platform, Detectify Surface MonitoringPage updated Nov 2026
The product
Fast passive subdomain enumeration tool
Subfinder is a free External Attack Surface Management solution. The closest matches by shared tags and NIST CSF 2.0 coverage are ctlogs.dev, Detectify Platform, Detectify Surface Monitoring, Halo Security Attack Surface Discovery, and Intruder Discover Attack Surface. All 48 alternatives on this page are ranked the same way.
These 8 solutions overlap most with Subfinder. 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 alternativesSubfinder vs ctlogs.dev
Platform for external attack surface management and application security testing
Key features: 10 listed. See them on the Detectify Platform page.
View Detectify PlatformDetectify Platform alternativesSubfinder vs Detectify Platform
Monitors internet-facing subdomains for vulnerabilities and misconfigurations
Key features: 10 listed. See them on the Detectify Surface Monitoring page.
View Detectify Surface MonitoringDetectify Surface Monitoring alternativesSubfinder vs Detectify Surface Monitoring
Discovers and inventories internet-facing assets including subdomains, IPs, and apps.
Key features: 10 listed. See them on the Halo Security Attack Surface Discovery page.
View Halo Security Attack Surface DiscoveryHalo Security Attack Surface Discovery alternativesSubfinder vs Halo Security Attack Surface Discovery
Attack surface management platform for discovering and securing exposed assets
Key features: 10 listed. See them on the Intruder Discover Attack Surface page.
View Intruder Discover Attack SurfaceIntruder Discover Attack Surface alternativesSubfinder vs Intruder Discover Attack Surface
ASM platform that scans external attack surfaces hourly for vulnerabilities
Key features: 10 listed. See them on the Searchlight Exposure page.
View Searchlight ExposureSearchlight Exposure alternativesSubfinder vs Searchlight Exposure
Automated digital asset discovery and monitoring for external attack surface
Key features: 10 listed. See them on the Ceeyu Digital Footprint Monitoring page.
View Ceeyu Digital Footprint MonitoringCeeyu Digital Footprint Monitoring alternativesSubfinder vs Ceeyu Digital Footprint Monitoring
AI-powered EASM platform for digital asset discovery and monitoring.
Key features: 5 listed. See them on the Cylana EASM page.
View Cylana EASMCylana EASM alternativesSubfinder vs Cylana EASM
Fast Certificate Transparency search and JSON API for subdomain reconnaissance.
Platform for external attack surface management and application security testing
Monitors internet-facing subdomains for vulnerabilities and misconfigurations
Discovers and inventories internet-facing assets including subdomains, IPs, and apps.
Attack surface management platform for discovering and securing exposed assets
ASM platform that scans external attack surfaces hourly for vulnerabilities
Automated digital asset discovery and monitoring for external attack surface
AI-powered EASM platform for digital asset discovery and monitoring.
AI-enhanced EASM platform for external attack surface discovery and monitoring.
Continuous external attack surface monitoring that shows what changed between scans.
Agentless external attack surface monitoring with continuous change detection.
Continuous, agentless discovery and threat-intel enrichment of external internet-facing
Scans domains to discover attack surface, vulnerabilities, and generate hardening
ASM platform monitoring external attack surface, dark web leaks & 3rd-party risks.
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 mgmt platform with vuln scanning and cloud security features
Attack surface management platform for monitoring vulnerabilities and breaches
Discovers and monitors external internet assets for exposures and vulnerabilities
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
Internet intelligence platform for asset discovery and threat analysis
AI-driven internet scanning platform for asset discovery and threat hunting
Passive asset discovery platform using Netflow data for attack surface mapping
DNS security posture management across multicloud and on-prem environments
External attack surface management platform for asset discovery and vuln mgmt
AI-driven EASM platform for discovering and monitoring external-facing assets
External attack surface management platform for asset discovery and risk detection
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
Attack surface discovery platform monitoring digital assets and data exposures
Common questions when weighing alternatives to Subfinder.
The closest matches to Subfinder by shared tags and NIST CSF 2.0 coverage are ctlogs.dev, Detectify Platform, Detectify Surface Monitoring, Halo Security Attack Surface Discovery, and Intruder Discover Attack Surface. All of them are External Attack Surface Management products.
This page shows 48 alternatives to Subfinder, 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.
Subfinder 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.
Subfinder is a External Attack Surface Management product in the Exposure & Vulnerability Management category. You can compare it with the 48 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
