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Head-to-head · WHOIS Lookup Tools

WhoisDataCenter vs WhoisJSON API

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score WhoisDataCenter #1 in WHOIS Lookup Tools 9.4/10 Free plan Free plan✓ 1 of 3 features Try WhoisDataCenter
WhoisJSON API #4 in WHOIS Lookup Tools 8.8/10 Free plan Free plan✓ 0 of 3 features Visit WhoisJSON

WhoisDataCenter leads on 0 checks, WhoisJSON API on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreWhoisDataCenter · 9.4/10
  • Free planboth
  • Most featuresWhoisDataCenter · 1 of 3

WhoisDataCenter scores higher on our rubric for whois lookup tools: 9.4 against 8.8 out of 10; our editors rank them #1 and #4.

WhoisDataCenter is the better fit for investigators needing current and historical WHOIS. WhoisJSON API is the better fit for API users needing WHOIS plus domain intelligence.

  • WhoisDataCenter fits best

    Investigators needing current and historical WHOIS

  • WhoisJSON API fits best

    API users needing WHOIS plus domain intelligence

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Side by side

Feature WhoisDataCenter 9.4/10 Visit ↗ WhoisJSON API 8.8/10 Visit ↗
At a glance
Editor score 9.4 8.8
Ranking #1 in WHOIS Lookup Tools #4 in WHOIS Lookup Tools
Best for Investigators needing current and historical WHOIS API users needing WHOIS plus domain intelligence
Pricing model Free plan + paid Free plan + paid
Starting price — $10/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Support Email, Tickets, Docs · 24/7 Docs
Compliance GDPR GDPR
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features WhoisDataCenter 1/3 · WhoisJSON API 0/3
Bulk lookup Not checked yet Not checked yet
Historical WHOIS ✓ (best) Not checked yet
RDAP support Not checked yet Not checked yet
Specs
API access Full Not checked yet
Monthly lookup limit Not checked yet Not checked yet
Export formats CSV, JSON Not checked yet
Our review
Pros
  • Historical WHOIS records support domain research over time.
  • Reverse lookup searches multiple registrant and DNS identifiers.
  • APIs, lifecycle feeds, and CSV/JSON delivery support workflows.
  • Combines WHOIS, DNS, SSL, availability, and monitoring endpoints
  • Adds subdomain discovery and email-domain signup risk scoring
  • Supports JSON output with integrations for PHP, Python, and Node.js
Cons
  • Free query allowances vary by lookup product.
  • Larger databases and recurring feeds are sold separately.
  • Its broad data offering may exceed simple lookup needs.
  • It is an API service rather than a conventional API client
  • XML support is limited to qualifying plans
  • Higher-volume access requires moving through multiple paid tiers
Our verdict

WhoisDataCenter is a domain-intelligence service for cybersecurity teams, brand-protection agencies, researchers, legal teams, businesses, and other data-driven organizations. It combines current WHOIS lookups with historical records,…

Read the review →

WhoisJSON API is a hosted REST API for developers and businesses that need structured domain intelligence. Its endpoints cover WHOIS and RDAP registration lookups, DNS record resolution, SSL/TLS certificate validation, real-time domain…

Read the review →
  1. WhoisDataCenterWHOIS Lookup Tools 9.4Free plan
  2. WhoisJSON APIWHOIS Lookup Tools 8.8Free plan

Strengths and trade-offs

  • WhoisDataCenter — where it wins

    • Historical WHOIS records support domain research over time.
    • Reverse lookup searches multiple registrant and DNS identifiers.
    • APIs, lifecycle feeds, and CSV/JSON delivery support workflows.

    Where it doesn't

    • Free query allowances vary by lookup product.
    • Larger databases and recurring feeds are sold separately.
    • Its broad data offering may exceed simple lookup needs.

  • WhoisJSON API — where it wins

    • Combines WHOIS, DNS, SSL, availability, and monitoring endpoints
    • Adds subdomain discovery and email-domain signup risk scoring
    • Supports JSON output with integrations for PHP, Python, and Node.js

    Where it doesn't

    • It is an API service rather than a conventional API client
    • XML support is limited to qualifying plans
    • Higher-volume access requires moving through multiple paid tiers

More comparisons

All WHOIS lookup tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update