WhoisXML API Reverse WHOIS vs DomainCrawler

WhoisXML API Reverse WHOIS9.4Visit DomainCrawler8.4Visit

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

DomainCrawler #8 in Reverse WHOIS Search Tools 8.4/10 Pricing on request ✓ 6 of 6 features Visit DomainCrawler

• WhoisXML API Reverse WHOIS fits best

  Broad, flexible reverse-WHOIS investigations

• DomainCrawler fits best

  Mature domain research and monitoring teams

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Side by side

Feature	WhoisXML API Reverse WHOIS 9.4/10 Visit ↗	DomainCrawler 8.4/10 Visit ↗
At a glance
Editor score	9.4	8.4
Ranking	#1 in Reverse WHOIS Search Tools	#8 in Reverse WHOIS Search Tools
Best for	Broad, flexible reverse-WHOIS investigations	Mature domain research and monitoring teams
Pricing model	Free plan + paid	Paid
Starting price	Free plan	Pricing on request
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Docs	Docs
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features WhoisXML API Reverse WHOIS 6/6 · DomainCrawler 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	Searches by person, organization, or email address Combines historical WHOIS with DNS, SSL, metadata, and technology data Supports alerts, bulk analysis, filters, and API access
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	Pricing requires contacting the company The breadth of data may exceed narrow lookup needs Advanced research requires learning more than one data source
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 →	DomainCrawler is a domain and web-data research platform for digital investigators, cybersecurity teams, brand-protection agencies, registries, registrars, OSINT researchers, and market researchers. Its Domain Research Tool supports… 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

• DomainCrawler — where it wins

  • Searches by person, organization, or email address
  • Combines historical WHOIS with DNS, SSL, metadata, and technology data
  • Supports alerts, bulk analysis, filters, and API access

  Where it doesn't

  • Pricing requires contacting the company
  • The breadth of data may exceed narrow lookup needs
  • Advanced research requires learning more than one data source

• 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 →
• DomainCrawler8.4/10 · Pricing on request

  A deep reverse WHOIS and domain-monitoring toolkit for established research teams.

  Visit DomainCrawlerFull verdict →