The FOFA alternative with perceptual favicon search
A powerful field:value search across hosts, DNS, WHOIS and certificates - with favicon similarity that goes beyond exact icon hash, English-first and EU-based.
Profundis is a unified internet-intelligence search engine with a powerful field:value query language (wildcards, AND/OR/NOT) across hosts, DNS, WHOIS, TLS certificates and virtual hosts. Like FOFA, it lets you pivot across cyberspace assets, including by favicon.
Profundis’s favicon search uses perceptual similarity (MMH3 + visual similarity) rather than only an exact icon hash, so it surfaces visually similar favicons too. The interface is English-first, the platform is EU-based, and an official MCP server lets AI agents search natively.
What FOFA is known for
FOFA is widely known as a cyberspace search engine with a powerful query syntax, including favicon icon-hash search.
Why Profundis
Favicon perceptual-similarity search (MMH3 + visual similarity) that finds visually similar favicons, not just exact icon-hash matches - Profundis’s signature differentiator.
A unified internet-intelligence engine - exposed hosts and services, DNS (live + historical/passive), WHOIS (with reverse/registrant lookups), TLS certificates and virtual hosts - all searchable in one place with a field:value syntax (wildcards, AND/OR/NOT).
An official MCP (Model Context Protocol) server, so AI agents like Claude can call Profundis search as native tools - AI-agent-native distribution.
EU-based operation (Perspective Analytics SAS, France) for a data-residency / GDPR-friendly posture.
A free tier with no signup required for the hosts and DNS anonymous preview, plus transparent credit-based pricing from Free and Solo to Professional and Enterprise.
Profundis vs FOFA
| Capability | Profundis | FOFA |
|---|---|---|
| Cyberspace asset / host search | Core feature | Core feature |
| Field:value query syntax (wildcards, AND/OR/NOT) | Across all datasets | Core feature |
| Favicon search | Perceptual similarity | Favicon icon-hash search |
| Unified DNS (live + historical/passive) | Built in | Supported |
| WHOIS + reverse/registrant lookups | Built in | Varies by plan |
| TLS certificate search | Built in | Supported |
| English-first interface | English-first | Varies |
| Official MCP server for AI agents | Native tools | - |
| Free tier with no-signup host/DNS preview | No signup to preview | Varies by plan |
| EU-based operator (GDPR posture) | France (EU) | Varies |
“✓” marks a Profundis capability. “-” means the capability is not a documented public feature of FOFA at the time of writing - not a definitive statement about its roadmap. Based on publicly available information.
Frequently asked questions
Profundis offers a free tier and an anonymous host/DNS preview with no signup. The full query language, favicon search and API are available with transparent credit-based plans.
FOFA is widely known for favicon icon-hash search. Profundis offers favicon search too, but uses perceptual similarity (MMH3 + visual similarity), so it surfaces visually similar favicons rather than only exact-hash matches.
Yes. Profundis uses a field:value syntax with wildcards and AND/OR/NOT operators across hosts, DNS, WHOIS, certificates and virtual hosts.
Yes. Profundis is English-first and operated by Perspective Analytics SAS in France (EU), giving it a data-residency and GDPR-friendly posture.
Yes. Profundis provides an API and an official MCP server, so AI agents like Claude can call its search as native tools.
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