Profundis review
A broad reverse WHOIS and internet-intelligence toolkit with API access and credit-based pricing.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Profundis is an internet-intelligence search engine for security researchers, OSINT analysts and bug-bounty hunters. It combines reverse WHOIS searches with research across internet hosts, services, DNS, TLS certificates and virtual hosts. Searches can use registrant organization, registrant name and registrant email fields, making the product particularly suited to investigators tracing domain relationships or examining an organization’s internet presence.
The published plans use credits. The Free plan includes 50 monthly credits. One-time credit packs include the Starter pack with 1,000 credits for $22, the Pro pack with 3,000 credits for $59, the Bulk pack with 8,000 credits for $139, and the Mega pack with 20,000 credits for $329. Credits in these paid packs do not expire. This structure suits project-based research and workloads that vary over time, while recurring subscription pricing is not part of the listed plan structure.
Profundis stands out through the range of connected investigation features around reverse WHOIS. Wildcard and Boolean query syntax support more targeted searches, while historical and live DNS search, TLS certificate and virtual-host search, favicon similarity search, and subdomain enumeration extend research beyond registration records. Real-time host discovery alerts and export options add monitoring and reporting functions, and programmatic API access is available alongside the web platform. Organizations needing a focused, occasional domain lookup may find this broader toolkit more than they need; investigators mapping organizations, registrants, domains and infrastructure should find the feature mix more relevant.
Profundis pros and cons
- Where it wins
- Reverse searches by organization, registrant name and email
- Wildcard and Boolean syntax across WHOIS and other datasets
- DNS, TLS certificate, subdomain and host discovery tools
- Where it doesn't
- Credit-based pricing may require planning for larger investigations
- The Free plan includes 50 monthly credits
- Its broad research scope may exceed simple WHOIS lookup needs
Profundis fact sheet, pricing and score →
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