Top picks: crt.sh, Amass, assetfinder — plus 45 more compared.
Attack SurfaceEvaluating Findomain alternatives comes down to matching Attack Surface capabilities to your environment, integrations, and budget rather than chasing feature parity. The options below are compared on what actually drives a switch: coverage, deployment fit, pricing, and real reviews from security teams. Independent and vendor-neutral: we never sell rankings.
Findomain is a free External Attack Surface Management tool. Security professionals most commonly compare it with crt.sh, Amass, assetfinder, Halo Security Attack Surface Discovery, and Zerocopter Recon. All 48 alternatives are matched by shared capabilities, tags, and NIST CSF 2.0 coverage.
A closer look at the 8 most relevant alternatives and competitors to Findomain, including their key features and shared capabilities.
Bash script for subdomain enumeration via crt.sh certificate transparency logs.
Shares 3 capabilities with Findomain: Reconnaissance, Network Reconnaissance, Subdomain Enumeration
Amass is an open-source OWASP tool for comprehensive attack surface mapping and asset discovery through domain reconnaissance and subdomain enumeration.
Shares 3 capabilities with Findomain: Reconnaissance, Network Reconnaissance, Subdomain Enumeration
A command-line tool for discovering domains and subdomains related to a target domain during reconnaissance activities.
Shares 3 capabilities with Findomain: Reconnaissance, Network Reconnaissance, Subdomain Enumeration
Discovers and inventories internet-facing assets including subdomains, IPs, and apps.
External attack surface mapping service to discover exposed digital assets
External attack surface scanning for MSPs to identify vulnerabilities
OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web.
AI-powered EASM platform for digital asset discovery and monitoring.
Bash script for subdomain enumeration via crt.sh certificate transparency logs.
Amass is an open-source OWASP tool for comprehensive attack surface mapping and asset discovery through domain reconnaissance and subdomain enumeration.
A command-line tool for discovering domains and subdomains related to a target domain during reconnaissance activities.
Discovers and inventories internet-facing assets including subdomains, IPs, and apps.
External attack surface mapping service to discover exposed digital assets
External attack surface scanning for MSPs to identify vulnerabilities
OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web.
AI-powered EASM platform for digital asset discovery and monitoring.
EASM platform for continuous discovery and risk assessment of external assets.
Domain exposure monitoring tool for leaked creds, subdomains & dark web data.
AI-enhanced EASM platform for external attack surface discovery and monitoring.
Curated Google dork search tool for OSINT and web reconnaissance.
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.
Explore the top million websites, ranked by referring subnets, and gain insights into online influence and popularity.
Cloud_enum is a multi-cloud OSINT tool that enumerates publicly accessible resources across AWS, Azure, and Google Cloud platforms for security assessment purposes.
Sublist3r is a python tool for enumerating subdomains using OSINT and various search engines.
A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)
A script to extract subdomains/emails for a given domain using SSL/TLS certificate dataset on Censys.
An automation framework that runs multiple open-source subdomain bruteforcing tools in parallel using Docker Compose and custom wordlists.
A subdomain scan tool that helps you find subdomains of a given domain.
A Python-based tool for external attack surface discovery and reconnaissance across large-scale networks, focusing on IP address and subdomain enumeration.
A Python API client for BuiltWith that enables programmatic access to website technology profiling and reconnaissance data.
ASM platform that scans external attack surfaces hourly for vulnerabilities
Sn1per Professional 2026: automated penetration testing & attack surface management
Internet intelligence platform for asset discovery and attack surface mapping
Automated ASM tool for multi-cloud environments with continuous asset discovery
Active attack surface mgmt solution for discovering & remediating unknown risks
Platform for external attack surface management and application security testing
Monitors internet-facing subdomains for vulnerabilities and misconfigurations
Customizable ASM platform for asset discovery, monitoring, and enrichment
Attack surface management platform for discovering and securing exposed assets
Automated digital asset discovery and monitoring for external attack surface
Continuous external asset discovery and monitoring with daily domain scans.
xASM platform covering external, internal, and API attack surfaces.
Maps external attack surface including assets, dark web exposure, and leaks.
Passive pre-sale domain diagnostic tool for vCISOs, MSPs & MSSPs.
ASM platform for continuous discovery and risk validation of internet-exposed assets.
Agentless EASM platform for asset discovery, exposure mgmt & risk reduction.
ASM platform monitoring external attack surface, dark web leaks & 3rd-party risks.
FestIn discovers open S3 buckets associated with a domain using crawling and DNS reconnaissance techniques.
FullHunt is a next-generation attack surface security platform that enables companies to discover, monitor, and secure their external attack surfaces.
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.
A source code search engine for searching alphanumeric snippets, signatures, or keywords in web page HTML, JS, and CSS code.
Automate your reconnaissance process with AttackSurfaceMapper, a tool for mapping and analyzing network attack surfaces.
Automate OSINT for threat intelligence and attack surface mapping with SpiderFoot.
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.
An easy-to-use and lightweight API wrapper for Censys APIs with support for Python 3.8+.
Python utility for testing the existence of domain names under different TLDs to find malicious subdomains.
Common questions security professionals ask when evaluating alternatives and competitors to Findomain.
The most popular alternatives to Findomain include crt.sh, Amass, assetfinder, Halo Security Attack Surface Discovery, and Zerocopter Recon. These External Attack Surface Management tools offer similar capabilities and are frequently compared by security professionals evaluating their options.
There are 48 alternatives to Findomain listed on CybersecTools, all within the External Attack Surface Management category. Each alternative is matched based on shared capabilities, tags, and NIST CSF coverage areas.
Findomain is a free External Attack Surface Management tool. You can use it at no cost. Both free and commercial alternatives are available for comparison.
Findomain is a External Attack Surface Management tool within the broader Attack Surface category. It is used by security professionals for external attack surface management capabilities and can be compared against 48 similar tools.
