WhoisGenius
WhoisGenius: A research-focused domain intelligence tool for attribution, correlation, and portfolio discovery. Ranked #19 of 25 in Reverse WHOIS Search Tools by our editors (7.2/10); pricing: Paid; best for attribution and evidence-focused investigations.
At a glance
- Editor score7.2 / 10
- PricingPaid
- Best forAttribution and evidence-focused investigations
- Free planNo
- Paid from$25 one-time
- Historical recordsYes
- Facts checked21 Sep 2026
Where it wins
- Full evidence chains with per-signal confidence breakdowns
- Reverse portfolio discovery, timelines, passive DNS, and correlation
- Bulk analysis for up to 500 domains plus REST API access
Where it doesn't
- No permanent free plan
- Paid access is organized around one-time credit packs
- Enterprise pricing and custom integrations require a higher-tier arrangement
Our verdict on WhoisGenius
WhoisGenius is a cloud-based domain intelligence product for identifying domain operators when WHOIS data is redacted or infrastructure is masked by CDNs. It combines registration, certificate, DNS, hosting, content, historical, and other signals into scored attribution results with an evidence chain. Security teams, researchers, legal and IP professionals, compliance teams, and organizations auditing domain portfolios can use it through the web dashboard or API.
Pricing is structured as one-time plans rather than a recurring subscription. Starter costs $25 one-time, Growth costs $99 one-time, and Scale costs $299 one-time. Each paid tier includes a full evidence chain on every analysis, all signals, API and dashboard access, and one-time credit packs. Enterprise adds everything in Scale, along with volume pricing, priority support, and custom integrations. Signup includes 75 credits without a card, while the available plan structure remains paid rather than a permanent $0 tier.
Its strongest distinction is the depth of attribution evidence. WhoisGenius supports reverse WHOIS portfolio discovery, historical ownership timelines, passive DNS analysis, cross-domain correlation, cluster detection, signed attribution certificates, and per-signal confidence breakdowns. Bulk analysis covers up to 500 domains, and the REST API includes batch analysis endpoints. Claude MCP and Postman are listed integrations, while optional AI enrichment addresses ambiguous cases. This makes the product a strong fit when attribution needs to be documented and compared across domains. Teams seeking a basic lookup tool, a permanent free plan, or straightforward recurring pricing may prefer a simpler alternative.
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WhoisGenius pricing
All 4 WhoisGenius plans and prices →
WhoisGenius fact sheet
| Free plan | No |
|---|---|
| Paid from | $25 one-time |
| Person/name search | Yes |
| Organization search | Yes |
| Email search | Yes |
| Historical records | Yes |
| Bulk search | Yes |
| API access | Yes |
| Result limit | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 2 integrations: Claude MCP, Postman |
| Pricing | Paid (source) |
| Website | whoisgeni.us |
| Facts checked | 21 Sep 2026 |
WhoisGenius integrations
WhoisGenius lists 2 integrations on its own site.
- Claude MCP
- Postman
Alternatives to WhoisGenius
- 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 WhoisGenius alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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