Shodan is a search engine that lets you find specific types of computers (routers, servers, etc.) connected to the internet.
Free trial available, pricing varies based on usage
Best FOFA Alternatives ranked by AI · updated Aug 2026
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FOFA is a cyberspace asset search engine for finding internet-facing hosts, services, applications, and devices. It is popular with researchers and penetration testers for its powerful query language, technology fingerprints, and large regional coverage.
Top 6 FOFA alternatives
Censys helps organizations discover and monitor every server, device, and system connected to the internet.
Contact for pricing
ZoomEye is a cyberspace search engine that allows users to search for specific network components. It can be used for network scanning...
Free and paid plans available
LeakIX is an internet-wide search engine for discovering exposed services, leaked credentials, and vulnerable infrastructure. It is aimed at security researchers, penetration...
Pros
- Strong focus on exposed services, leaks, and misconfigurations
- Provides detailed service fingerprints and historical exposure context
- Useful for reconnaissance and external attack-surface monitoring
Cons
- Smaller index and ecosystem than Shodan or Censys
- Search interface is less polished than leading commercial alternatives
- Coverage and data freshness can vary by protocol and region
Free, paid plans available
Netlas is an internet intelligence and asset discovery platform for security researchers, penetration testers, and defenders. It indexes exposed services, domains, certificates,...
Pros
- Combines host, domain, certificate, and web-technology data in one search interface
- Useful query language and API for reconnaissance workflows
- Often exposes detailed service metadata beyond basic port results
Cons
- Smaller data ecosystem and community than Shodan
- Free-tier limits can restrict large-scale research
- Results and historical coverage vary by asset and region
Freemium, paid plans from $49/mo
6
Netlas
Netlas
Netlas is an internet intelligence and asset-search platform covering hosts, domains, services, certificates, and web technologies. It serves security researchers and defenders...
Pros
- Combines host, domain, certificate, and web-technology searches
- Offers detailed filters for narrowing large internet datasets
- Useful for discovering related assets and exposed services
Cons
- Not designed primarily for Google-indexed document discovery
- Free access has usage and data limitations
- Dataset freshness and coverage can vary by asset type
Freemium; paid plans vary
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