Find out who really
runs a domain
Send a domain and get back the organization most likely operating it, even when WHOIS is redacted or the site sits behind a CDN. Every answer comes with the evidence behind it, so you can check it before you rely on it.
See what WHOIS hides
Try a domain where the registration is redacted or hidden behind a CDN, and watch WhoisGenius name the real operator anyway, with the evidence.
You're making decisions on incomplete data
Most WHOIS records no longer name the owner. A large share of sites sit behind a CDN that hides where they are hosted. And most tools that fill the gap do not show how they reached their answer.
WHOIS Returns Nothing
Privacy rules redact the ownership fields. The record you used to rely on now returns REDACTED FOR PRIVACY.
CDNs Hide the Operator
A large share of sites sit behind a CDN. Single-source tools tell you which CDN it is. You already knew that.
Scores Without Evidence
Other tools give you a number and nothing else. When the score is wrong, and sometimes it will be, you cannot see why.
An answer that shows its work
A single query checks many sources at once. The results are combined into one answer, with the evidence behind it laid out.
Query
Send any domain. Sources are checked in parallel. Quick answers in under 30 seconds. A full run takes about a minute.
Score
The signals are combined into a confidence score for each candidate organization.
Decompose
Every score breaks down into the signals behind it, so you can check the answer.
We publish our accuracy, including where we're wrong
Real attribution results on real domains. A tool you can't audit is a tool you can't trust.
See the benchmark: blind-sample accuracy with error bars, plus our regression suite and its missesFramework Computer Inc
corporationUnknown
registrarParked domain with no content, SSL, or identifying infrastructure
Mullvad VPN AB
corporationTeams that need answers they can verify
Attribution leads, with the evidence attached
Works When WHOIS Doesn't
GDPR-redacted domains, privacy-proxied registrations, CDN-masked origins. WhoisGenius names the most likely operator when single-source tools return nothing.
Evidence You Can Cite
Every confidence score decomposes into the signals behind it. Include the full evidence chain in reports, filings, or investigations. Not just a number.
Signed Records
Export a signed record of what the analysis found and when. It documents the evidence. It does not prove ownership on its own.
Accuracy Tested Blind
We measure accuracy on a random sample of domains we never tuned on, with answers we did not write, and publish it with its error bars. A separate 186-domain regression suite guards the hard cases, like CDN-masked and GDPR-redacted domains. See the results, methodology and caveats.
AI for Edge Cases
When the evidence is ambiguous, optional AI enrichment resolves entities and explains its reasoning in plain language. Zero cost when not needed.
One Call, One Answer
Quick answers in under 30 seconds. A full run takes about a minute. One API call returns the answer with its evidence, ready for automation or bulk analysis.
Historical Intelligence
v2.1Domains change hands. Infrastructure moves. WhoisGenius now tracks the full history so you can see who operated a domain last year, not just today.
Portfolio Discovery
v2.1You found one domain. But what else does that entity run? Reverse WHOIS maps the rest of the portfolio.
Simple, transparent pricing
Start with signup credits. Buy a pack when you need your next batch.
Full evidence chain included on every analysis.
How many domains do you need to analyze?
- Full evidence chain on every analysis
- All signals included
- API + dashboard access
- One-time credit packs
- Full evidence chain on every analysis
- All signals included
- API + dashboard access
- One-time credit packs
- Full evidence chain on every analysis
- All signals included
- API + dashboard access
- One-time credit packs
- Everything in Scale
- Volume pricing
- Priority support
- Custom integrations
Compare packs
Swipe to compare packs →
| Feature | Starter | Growth | Scale |
|---|---|---|---|
| Credits | 100 | 500 | 2,000 |
| Effective $/analysis | $0.25 | $0.20 | $0.15 |
| 1 credit = 1 fresh domain analysis | |||
| Available evidence and sources | |||
| API + dashboard access | |||
| BYOK supported | |||
| When credits run out | Buy a pack or use auto-recharge | Buy a pack or use auto-recharge | Buy a pack or use auto-recharge |
Frequently asked questions
Your first result in three lines
Quick answers in under 30 seconds. A full run takes about a minute.
No SDK required. Any HTTP client works.
# Submit a domain for analysis
curl -X POST https://api.whoisgeni.us/analyze \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"domain": "framework.computer"}'
# Poll for results
curl https://api.whoisgeni.us/jobs/JOB_ID \
-H "X-API-Key: YOUR_KEY"
"domain": "framework.computer",
"status": "completed",
"scoring_result":
"top_entity": "Framework Computer Inc",
"confidence": 0.72,
"signals": [
"source": "ssl_subject_org", "strength": "high" ,
"source": "http_jsonld_org", "strength": "high"
]
Use WhoisGenius as an MCP server
Add it to Claude Code or any Model Context Protocol client in one line. Two tools, analyze_domain and correlate_domains, run synchronously and return in seconds. Send your API key in the X-API-Key header.
claude mcp add --transport http whoisgenius https://api.whoisgeni.us/mcp --header "X-API-Key: YOUR_KEY" Prefer a config file? Point any client at https://api.whoisgeni.us/mcp with transport streamable-http.
See who really operates any domain
75 free credits to start, no card required. Full evidence chain on every result.
Sign up and start querying in under a minute.