WhoisXML API Reverse WHOIS vs DomainIQ

WhoisXML API Reverse WHOIS9.4Visit DomainIQ8.8Visit

Higher score WhoisXML API Reverse WHOIS #1 in Reverse WHOIS Search Tools 9.4/10 Free plan Free plan✓ 6 of 6 features Visit WhoisXML API

vs

DomainIQ #4 in Reverse WHOIS Search Tools 8.8/10 Paid ✓ 6 of 6 features Visit DomainIQ

• WhoisXML API Reverse WHOIS fits best

  Broad, flexible reverse-WHOIS investigations

• DomainIQ fits best

  Professional domain intelligence teams

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Side by side

Feature	WhoisXML API Reverse WHOIS 9.4/10 Visit ↗	DomainIQ 8.8/10 Visit ↗
At a glance
Editor score	9.4	8.8
Ranking	#1 in Reverse WHOIS Search Tools	#4 in Reverse WHOIS Search Tools
Best for	Broad, flexible reverse-WHOIS investigations	Professional domain intelligence teams
Pricing model	Free plan + paid	Paid
Starting price	Free plan	$49.95/mo
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Docs	Email, Docs
Built for	Small business, Mid-market, Enterprise	Small business, Enterprise
Features WhoisXML API Reverse WHOIS 6/6 · DomainIQ 6/6
Person/name search	✓	✓
Organization search	✓	✓
Email search	✓	✓
Historical records	✓	✓
Bulk search	✓	✓
API access	✓	✓
Specs
Result limit	10000 results (best)	100 results
Our review
Pros	Searches names, organizations, emails, phones, and postal addresses Combines historical records, date filters, and exact or fuzzy matching Supports REST API access, JSON/XML output, and pagination beyond 10,000 records	Reverse WHOIS includes current and historical ownership connections. Bulk, DNS, IP, MX and monitoring tools support larger investigations. API offers XML, JSON, CSV and INI output modes.
Cons	Search requests allow up to four included and four excluded terms Paid usage follows a DRS-credit model with one credit per request Its focus is WHOIS-linked domain discovery rather than broader investigation workflows	No free plan; Pro starts at $49.95 per month. Enterprise pricing is quote-based rather than publicly listed. The breadth may exceed the needs of occasional domain lookups.
Our verdict	WhoisXML API Reverse WHOIS searches WHOIS records to find domains connected to owner names, organization names, email addresses, phone numbers, or postal addresses. It supports both current and historical records, making it relevant to… Read the review →	DomainIQ is a web-based domain intelligence platform for researching domain names, registrants, organizations, email addresses, IP addresses and related infrastructure. It is designed for security professionals, attorneys, law enforcement,… Read the review →

Strengths and trade-offs

• WhoisXML API Reverse WHOIS — where it wins

  • Searches names, organizations, emails, phones, and postal addresses
  • Combines historical records, date filters, and exact or fuzzy matching
  • Supports REST API access, JSON/XML output, and pagination beyond 10,000 records

  Where it doesn't

  • Search requests allow up to four included and four excluded terms
  • Paid usage follows a DRS-credit model with one credit per request
  • Its focus is WHOIS-linked domain discovery rather than broader investigation workflows

• DomainIQ — where it wins

  • Reverse WHOIS includes current and historical ownership connections.
  • Bulk, DNS, IP, MX and monitoring tools support larger investigations.
  • API offers XML, JSON, CSV and INI output modes.

  Where it doesn't

  • No free plan; Pro starts at $49.95 per month.
  • Enterprise pricing is quote-based rather than publicly listed.
  • The breadth may exceed the needs of occasional domain lookups.

• WhoisXML API Reverse WHOIS9.4/10 · Free plan

  A flexible reverse-WHOIS service for current, historical, and large-scale domain investigations.

  Visit WhoisXML APIFull verdict →
• DomainIQ8.8/10 · Paid

  A broad domain-intelligence toolkit for professional investigations and monitoring.

  Visit DomainIQFull verdict →