# massdns alternatives and competitors (2026) The closest massdns alternatives are [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev), [Cylana EASM](https://cybersectools.com/tools/cylana-easm) and [TRaViS](https://cybersectools.com/tools/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 shown. Closest matches: ctlogs.dev, Cylana EASM, TRaViS. ## The product [massdns](https://cybersectools.com/tools/massdns) A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration) Category: [Exposure & Vulnerability Management](https://cybersectools.com/categories/exposure-vulnerability-management) · Pricing model: Free Need the answer fast? [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions) picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Google Mandiant Attack Surface Management and 4 more. ## massdns alternatives and competitors massdns is a free [External Attack Surface Management](https://cybersectools.com/categories/external-asm) solution. The closest matches by shared tags and NIST CSF 2.0 coverage are [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev), [Cylana EASM](https://cybersectools.com/tools/cylana-easm), [TRaViS](https://cybersectools.com/tools/travis), [SurfaceDiff](https://cybersectools.com/tools/surfacediff), and [MGM Security Partners recon me](https://cybersectools.com/tools/mgm-security-partners-recon-me). All 48 alternatives on this page are ranked the same way. Want a free option? See [free and open source exposure & vulnerability management solutions](https://cybersectools.com/free), plus free picks in other categories. ## The closest massdns alternatives These 8 solutions overlap most with massdns. Each one says what the product does and, when the overlap is big enough, which capabilities it shares. ### 1. [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) Fast Certificate Transparency search and JSON API for subdomain reconnaissance. [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: Real-time Certificate Transparency Search, Automated Subdomain Enumeration, High-Performance REST JSON API, Wildcard & Fingerprint Matching, SSL/TLS Certificate History Tracking [ctlogs.dev alternatives](https://cybersectools.com/alternatives/ctlogsdev) · [massdns vs ctlogs.dev](https://cybersectools.com/compare/ctlogsdev-vs-massdns) ### 2. [Cylana EASM](https://cybersectools.com/tools/cylana-easm) AI-powered EASM platform for digital asset discovery and monitoring. [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 5 listed. See them on the [Cylana EASM page](https://cybersectools.com/tools/cylana-easm#features). [Cylana EASM alternatives](https://cybersectools.com/alternatives/cylana-easm) · [massdns vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-massdns) ### 3. [TRaViS](https://cybersectools.com/tools/travis) AI-enhanced EASM platform for external attack surface discovery and monitoring. [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 10 listed. See them on the [TRaViS page](https://cybersectools.com/tools/travis#features). [TRaViS alternatives](https://cybersectools.com/alternatives/travis) · [massdns vs TRaViS](https://cybersectools.com/compare/massdns-vs-travis) ### 4. [SurfaceDiff](https://cybersectools.com/tools/surfacediff) Continuous external attack surface monitoring that shows what changed between scans. [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 9 listed. See them on the [SurfaceDiff page](https://cybersectools.com/tools/surfacediff#features). [SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff) · [massdns vs SurfaceDiff](https://cybersectools.com/compare/massdns-vs-surfacediff) ### 5. [MGM Security Partners recon me](https://cybersectools.com/tools/mgm-security-partners-recon-me) 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. Proprietary OSINT tool for mapping an organization's public attack surface [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 8 listed. See them on the [MGM Security Partners recon me page](https://cybersectools.com/tools/mgm-security-partners-recon-me#features). [MGM Security Partners recon me alternatives](https://cybersectools.com/alternatives/mgm-security-partners-recon-me) · [massdns vs MGM Security Partners recon me](https://cybersectools.com/compare/massdns-vs-mgm-security-partners-recon-me) ### 6. [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) Scans domains to discover attack surface, vulnerabilities, and generate hardening [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 10 listed. See them on the [DDactic Attack Surface Discovery page](https://cybersectools.com/tools/ddactic-attack-surface-discovery#features). [DDactic Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/ddactic-attack-surface-discovery) · [massdns vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-massdns) ### 7. [Censys Attack Surface Management](https://cybersectools.com/tools/censys-attack-surface-management) Internet intelligence platform for asset discovery and attack surface mapping [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 10 listed. See them on the [Censys Attack Surface Management page](https://cybersectools.com/tools/censys-attack-surface-management#features). [Censys Attack Surface Management alternatives](https://cybersectools.com/alternatives/censys-attack-surface-management) · [massdns vs Censys Attack Surface Management](https://cybersectools.com/compare/censys-attack-surface-management-vs-massdns) ### 8. [Matos Automated Attack Surface Management](https://cybersectools.com/tools/cloudmatos-automated-attack-surface-management) Automated ASM tool for multi-cloud environments with continuous asset discovery [External Attack Surface Management](https://cybersectools.com/categories/external-asm) · Commercial Key features: 10 listed. See them on the [Matos Automated Attack Surface Management page](https://cybersectools.com/tools/cloudmatos-automated-attack-surface-management#features). [Matos Automated Attack Surface Management alternatives](https://cybersectools.com/alternatives/cloudmatos-automated-attack-surface-management) · [massdns vs Matos Automated Attack Surface Management](https://cybersectools.com/compare/cloudmatos-automated-attack-surface-management-vs-massdns) ## The closest 48 products like massdns The 8 above, plus: - [Palo Alto Networks Cortex Xpanse](https://cybersectools.com/tools/palo-alto-networks-cortex-xpanse): Active attack surface mgmt solution for discovering & remediating unknown risks (Commercial) - [Cytrusst: Attack Surface Management (ASM)](https://cybersectools.com/tools/cytrusst-cyber-attack-surface-management): Cytrusst ASM is an attack surface management product that helps discover an organization's (Commercial) - [Detectify Platform](https://cybersectools.com/tools/detectify-platform): Platform for external attack surface management and application security testing (Commercial) - [Detectify Surface Monitoring](https://cybersectools.com/tools/detectify-surface-monitoring): Monitors internet-facing subdomains for vulnerabilities and misconfigurations (Commercial) - [Halo Security Attack Surface Discovery](https://cybersectools.com/tools/halo-security-attack-surface-discovery): Discovers and inventories internet-facing assets including subdomains, IPs, and apps. (Commercial) - [Intruder Discover Attack Surface](https://cybersectools.com/tools/intruder-discover-attack-surface): Attack surface management platform for discovering and securing exposed assets (Commercial) - [CyCognito EASM Platform](https://cybersectools.com/tools/cycognito-easm-platform): EASM platform that discovers, attributes, and actively validates external assets and risks (Commercial) - [Searchlight Exposure](https://cybersectools.com/tools/assetnote-attack-surface-management-tool): ASM platform that scans external attack surfaces hourly for vulnerabilities (Commercial) - [Ceeyu Digital Footprint Monitoring](https://cybersectools.com/tools/ceeyu-digital-footprint-monitoring): Automated digital asset discovery and monitoring for external attack surface (Commercial) - [Zerocopter Recon](https://cybersectools.com/tools/zerocopter-recon): External attack surface mapping service to discover exposed digital assets (Commercial) - [ConnectSecure Attack Surface Scanning](https://cybersectools.com/tools/connectsecure-attack-surface-scanning): External attack surface scanning for MSPs to identify vulnerabilities (Commercial) - [Aleph Search](https://cybersectools.com/tools/aleph-search-clear): OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web. (Commercial) - [Cobalt Attack Surface Monitoring](https://cybersectools.com/tools/cobalt-attack-surface-monitoring): Continuous external asset discovery and monitoring with daily domain scans. (Commercial) - [Muscope|Risk - Attack Perimeter](https://cybersectools.com/tools/muscopeorrisk-attack-perimeter): Maps external attack surface including assets, dark web exposure, and leaks. (Commercial) - [Qontrol Avant-Vente](https://cybersectools.com/tools/qontrol-avant-vente): Passive pre-sale domain diagnostic tool for vCISOs, MSPs & MSSPs. (Commercial) - [Vulneri ASM](https://cybersectools.com/tools/vulneri-asm-attack-surface-management): ASM platform for continuous discovery and risk validation of internet-exposed assets. (Commercial) - [Attaxion](https://cybersectools.com/tools/attaxion): Agentless EASM platform for asset discovery, exposure mgmt & risk reduction. (Commercial) - [ThreatDefence Integrated ASM](https://cybersectools.com/tools/threatdefence-integrated-asm): ASM platform monitoring external attack surface, dark web leaks & 3rd-party risks. (Commercial) - [Sn1per Professional 2026](https://cybersectools.com/tools/sn1per-professional-2026): Sn1per Professional 2026: automated penetration testing & attack surface management (Commercial) - [Domain Beacon](https://cybersectools.com/tools/domain-beacon): Provide intelligence about a domain (Commercial) - [Attack Surface Scan](https://cybersectools.com/tools/attack-surface-scan): Agentless external attack surface monitoring with continuous change detection. (Commercial) - [GuardEon](https://cybersectools.com/tools/guardeon): Agentless external attack surface & dark web monitoring platform. (Commercial) - [ArmorPoint Attack Surface Management](https://cybersectools.com/tools/armorpoint-attack-surface-management): Continuous, agentless discovery and threat-intel enrichment of external internet-facing (Commercial) - [FalconTech Threat Hunter](https://cybersectools.com/tools/falcontech-threat-hunter) (Commercial) - [Driftnet Explore](https://cybersectools.com/tools/driftnet-explore): Internet-wide scanning platform for discovering exposed devices, services (Commercial) - [Outpost24 External Attack Surface Management](https://cybersectools.com/tools/outpost24-external-attack-surface-management): Cloud platform for continuous visibility & mgmt of external attack surfaces (Commercial) - [StrikeOne Attack Surfa](https://cybersectools.com/tools/strikeone-attack-surfa): AI-powered attack surface management platform for cybersecurity monitoring (Commercial) - [Hadrian Agentic AI](https://cybersectools.com/tools/hadrian-agentic-ai): AI-powered platform for continuous attack surface discovery and pentesting (Commercial) - [Microsoft Defender EASM](https://cybersectools.com/tools/microsoft-defender-external-attack-surface-management): Discovers and monitors external-facing assets and vulnerabilities (Commercial) - [Halo Security Attack Surface Management](https://cybersectools.com/tools/halo-security-attack-surface-management): External attack surface mgmt platform for discovering & monitoring assets (Commercial) - [Assetnote ASM](https://cybersectools.com/tools/assetnote-asm): External attack surface management platform with continuous asset discovery (Commercial) - [CloudSEK Attack Surface Management](https://cybersectools.com/tools/cloudsek-attack-surface-management): External attack surface management platform for discovering digital assets (Commercial) - [Risksurface](https://cybersectools.com/tools/risksurface): SaaS platform for attack surface management and vulnerability detection (Commercial) - [QuimeraX External Attack Surface Management](https://cybersectools.com/tools/quimerax-external-attack-surface-management): EASM platform for continuous monitoring of internet-exposed assets & vulnerabilities (Commercial) - [ThingsRecon Supply Chain Intelligence](https://cybersectools.com/tools/thingsrecon-supply-chain-intelligence): Supply chain intelligence platform mapping digital ecosystems & proximity risks (Commercial) - [Intruder Attack Surface Management](https://cybersectools.com/tools/intruder-attack-surface-management): Attack surface mgmt platform with vuln scanning and cloud security features (Commercial) - [RiskXchange Attack Surface Management](https://cybersectools.com/tools/riskxchange-attack-surface-management): Attack surface management platform for monitoring vulnerabilities and breaches (Commercial) - [Mandiant Attack Surface Management](https://cybersectools.com/tools/mandiant-attack-surface-management): Discovers and monitors external internet assets for exposures and vulnerabilities (Commercial) - [Zerofox External Attack Surface Management](https://cybersectools.com/tools/zerofox-external-attack-surface-management): Discovers and manages internet-facing assets with vulnerability prioritization (Commercial) - [ImmuniWeb® Discovery](https://cybersectools.com/tools/immuniweb-discovery): 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. (Commercial) ## Alternatives to each of these [ctlogs.dev alternatives](https://cybersectools.com/alternatives/ctlogsdev) · [Cylana EASM alternatives](https://cybersectools.com/alternatives/cylana-easm) · [TRaViS alternatives](https://cybersectools.com/alternatives/travis) · [SurfaceDiff alternatives](https://cybersectools.com/alternatives/surfacediff) · [MGM Security Partners recon me alternatives](https://cybersectools.com/alternatives/mgm-security-partners-recon-me) · [DDactic Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/ddactic-attack-surface-discovery) · [Censys Attack Surface Management alternatives](https://cybersectools.com/alternatives/censys-attack-surface-management) · [Matos Automated Attack Surface Management alternatives](https://cybersectools.com/alternatives/cloudmatos-automated-attack-surface-management) · [Palo Alto Networks Cortex Xpanse alternatives](https://cybersectools.com/alternatives/palo-alto-networks-cortex-xpanse) · [Cytrusst: Attack Surface Management (ASM) alternatives](https://cybersectools.com/alternatives/cytrusst-cyber-attack-surface-management) · [Detectify Platform alternatives](https://cybersectools.com/alternatives/detectify-platform) · [Detectify Surface Monitoring alternatives](https://cybersectools.com/alternatives/detectify-surface-monitoring) ## Compare massdns with - [massdns vs ctlogs.dev](https://cybersectools.com/compare/ctlogsdev-vs-massdns) - [massdns vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-massdns) - [massdns vs TRaViS](https://cybersectools.com/compare/massdns-vs-travis) - [massdns vs SurfaceDiff](https://cybersectools.com/compare/massdns-vs-surfacediff) - [massdns vs MGM Security Partners recon me](https://cybersectools.com/compare/massdns-vs-mgm-security-partners-recon-me) - [massdns vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-massdns) - [massdns vs Censys Attack Surface Management](https://cybersectools.com/compare/censys-attack-surface-management-vs-massdns) - [massdns vs Matos Automated Attack Surface Management](https://cybersectools.com/compare/cloudmatos-automated-attack-surface-management-vs-massdns) ## massdns Alternatives FAQ ### What are the closest 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. ### How many alternatives to massdns are available? 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. ### Is massdns free or commercial? 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. ### What type of solution is massdns? 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. --- Source: https://cybersectools.com/alternatives/massdns For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any product or compare page has a Markdown copy too (add .md to its URL). More on massdns and its alternatives: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=alternatives-md