Profundis
Profundis: A broad reverse WHOIS and internet-intelligence toolkit with API access and credit-based pricing. Ranked #13 of 25 in Reverse WHOIS Search Tools by our editors (7.9/10); pricing: Free plan; best for organization-focused investigators.
At a glance
- Editor score7.9 / 10
- PricingFree plan
- Best forOrganization-focused investigators
- Free planYes
- Facts checked21 Sep 2026
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
Our verdict on Profundis
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.
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Profundis pricing
All 5 Profundis plans and prices →
Profundis fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Person/name search | Yes |
| Organization search | Yes |
| Email search | Yes |
| Historical records | Not verified |
| Bulk search | Not verified |
| API access | Yes |
| Result limit | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | GDPR |
| Support | Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | profundis.io |
| Facts checked | 21 Sep 2026 |
Alternatives to Profundis
- WhoisXML API Reverse WHOISA flexible reverse-WHOIS service for current, historical, and large-scale domain investigations.9.4
- WhoxyA broad WHOIS data service for high-volume API, reverse search, and bulk lookup work.9.2
- WhoisologyA focused research tool for tracing domain ownership, connections, and historical records.9.0
See all Profundis alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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