WhoisXML API Reverse WHOIS vs DomainTools Reverse WHOIS

WhoisXML API Reverse WHOIS9.4Visit DomainTools Reverse WHOIS8.6Visit

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

DomainTools Reverse WHOIS #6 in Reverse WHOIS Search Tools 8.6/10 Paid ✓ 6 of 6 features Visit DomainTools

• WhoisXML API Reverse WHOIS fits best

  Broad, flexible reverse-WHOIS investigations

• DomainTools Reverse WHOIS fits best

  Threat-intelligence professionals

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Side by side

Feature	WhoisXML API Reverse WHOIS 9.4/10 Visit ↗	DomainTools Reverse WHOIS 8.6/10 Visit ↗
At a glance
Editor score	9.4	8.6
Ranking	#1 in Reverse WHOIS Search Tools	#6 in Reverse WHOIS Search Tools
Best for	Broad, flexible reverse-WHOIS investigations	Threat-intelligence professionals
Pricing model	Free plan + paid	Paid
Starting price	Free plan	$995/yr
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Docs	Email, Docs
Integrations	14 integrations	12 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Enterprise
Features WhoisXML API Reverse WHOIS 6/6 · DomainTools Reverse WHOIS 6/6
Person/name search	✓	✓
Organization search	✓	✓
Email search	✓	✓
Historical records	✓	✓
Bulk search	✓	✓
API access	✓	✓
Specs
Result limit	10000 results	Not checked yet
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	Search by email, company, organization or registrant name Supports current and historical WHOIS records API access and integrations with major security platforms
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 includes Reverse WHOIS searches Individual Membership has limited monthly searches Enterprise access is sold separately from individual plans
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 →	DomainTools Reverse WHOIS helps investigators find domains connected by shared registration information. Searches can use an email address, company or organization name, or registrant or contact name. It supports current and historical… 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

• DomainTools Reverse WHOIS — where it wins

  • Search by email, company, organization or registrant name
  • Supports current and historical WHOIS records
  • API access and integrations with major security platforms

  Where it doesn't

  • No free plan includes Reverse WHOIS searches
  • Individual Membership has limited monthly searches
  • Enterprise access is sold separately from individual plans

• 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 →
• DomainTools Reverse WHOIS8.6/10 · Paid

  A paid Reverse WHOIS service for current, historical and multi-term domain research.

  Visit DomainToolsFull verdict →