The closest massdns alternatives are ctlogs.dev, Cylana EASM and TRaViS. Picking a massdns 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, Cylana EASM, TRaViSPage updated Nov 2026
The product
A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)
Need the answer fast? Best Attack Surface Management Solutions for Business picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Google Mandiant Attack Surface Management and 4 more.See the shortlist
massdns is a free External Attack Surface Management solution. The closest matches by shared tags and NIST CSF 2.0 coverage are ctlogs.dev, Cylana EASM, TRaViS, SurfaceDiff, and MGM Security Partners recon me. All 48 alternatives on this page are ranked the same way.
These 8 solutions overlap most with massdns. 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
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 alternativesmassdns vs Cylana EASM
AI-enhanced EASM platform for external attack surface discovery and monitoring.
Key features: 10 listed. See them on the TRaViS page.
Continuous external attack surface monitoring that shows what changed between scans.
Key features: 9 listed. See them on the SurfaceDiff page.
View SurfaceDiffSurfaceDiff alternativesmassdns vs SurfaceDiff
recon me is an OSINT tool developed by mgm Security Partners and used as part of the company's OSINT analysis service. The tool collects and correlates publicly available information about an organization's external attack surface, including domains, subdomains, servers, technologies used, metadata, and publicly accessible files. It supports two scan modes: - Passive scan: queries public directory services such as Whois, DNS, and MX records to identify servers, subdomains, email addresses, technologies, and operators (e.g. Amazon, Akamai) without any interaction with target systems. - Active scan: directly examines the target domain without performing attacks, to identify additional services, technologies, or unintentionally exposed files. Results from recon me are combined with manual expert analysis and used to produce a report detailing identified assets, potential vulnerabilities, misconfigurations, and prioritized recommendations. The output is intended to give organizations a view of their public attack surface from an attacker's perspective and can serve as a basis for further security testing such as penetration tests.</description> <parameter name="summary">Proprietary OSINT tool for mapping an organization's public attack surface
Key features: 8 listed. See them on the MGM Security Partners recon me page.
Scans domains to discover attack surface, vulnerabilities, and generate hardening
Key features: 10 listed. See them on the DDactic Attack Surface Discovery page.
View DDactic Attack Surface DiscoveryDDactic Attack Surface Discovery alternativesmassdns vs DDactic Attack Surface Discovery
Internet intelligence platform for asset discovery and attack surface mapping
Key features: 10 listed. See them on the Censys Attack Surface Management page.
View Censys Attack Surface ManagementCensys Attack Surface Management alternativesmassdns vs Censys Attack Surface Management
Automated ASM tool for multi-cloud environments with continuous asset discovery
Key features: 10 listed. See them on the Matos Automated Attack Surface Management page.
View Matos Automated Attack Surface ManagementMatos Automated Attack Surface Management alternativesmassdns vs Matos Automated Attack Surface Management
Fast Certificate Transparency search and JSON API for subdomain reconnaissance.
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.
Scans domains to discover attack surface, vulnerabilities, and generate hardening
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
Cytrusst ASM is an attack surface management product that helps discover an organization's
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
EASM platform that discovers, attributes, and actively validates external assets and risks
ASM platform that scans external attack surfaces hourly for vulnerabilities
Automated digital asset discovery and monitoring for external attack surface
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.
Continuous external asset discovery and monitoring with daily domain scans.
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.
Sn1per Professional 2026: automated penetration testing & attack surface management
Agentless external attack surface monitoring with continuous change detection.
Agentless external attack surface & dark web monitoring platform.
Continuous, agentless discovery and threat-intel enrichment of external internet-facing
Internet-wide scanning platform for discovering exposed devices, services
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
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.
Common questions when weighing alternatives to massdns.
The closest matches to massdns by shared tags and NIST CSF 2.0 coverage are ctlogs.dev, Cylana EASM, TRaViS, SurfaceDiff, and MGM Security Partners recon me. All of them are External Attack Surface Management products.
This page shows 48 alternatives to massdns, 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.
massdns 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.
massdns 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.
