SecurityTrails vs WhoisXML API: API Comparison

Overview

SecurityTrails

DNS & Domain Intelligence for Security Research

SecurityTrails provides comprehensive DNS intelligence, passive DNS data, subdomain enumeration, and WHOIS history for security researchers and threat intelligence teams.

No current public free-tier terms

WhoisXML API

Enterprise Domain, IP & DNS Intelligence

WhoisXML API offers product-specific WHOIS, DNS, IP, and threat data packages plus annual enterprise bundles for research, fraud, and security teams.

500 WHOIS queries, no card required

Pricing Comparison

Pricing	SecurityTrails	WhoisXML API
Free Tier	No current public free-tier terms	500 WHOIS queries, no card required
Paid Plans	Contact sales	$30/month for 2,000 WHOIS queries
Enterprise	Custom pricing	$3,600/month for 2 million queries; unlimited custom
TLD Coverage	320M+ domains indexed	7,500+ TLDs

Feature Comparison

Feature	SecurityTrails	WhoisXML API
Free Tier	Not Included	Limited
API Access	Included	Included
Bulk Operations	Included	Included
Real-time Data	Included	Included
WHOIS Data	Included	Included
DNS Lookup	Included	Included
Domain Valuation	Not Included	Not Included
Brand Monitoring	Limited	Premium Only
MCP/AI Integration	Not Included	Included

Which is Better?

Choose SecurityTrails if you need

Massive passive DNS database
Excellent subdomain enumeration
Historical WHOIS and DNS data

Choose WhoisXML API if you need

Very broad domain and infrastructure coverage
Historical WHOIS, DNS, and threat data
Enterprise packages for security workflows

Consider DomScan Instead

DomScan offers the best of both worlds with comprehensive features and developer-friendly pricing.

✓ Free tier: 10,000 credits/month (no credit card)
✓ 1,100+ TLDs supported
✓ MCP integration for AI assistants
✓ Domain valuation, brand monitoring, OSINT

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