2026 Review

SecurityTrails Review

DNS & Domain Intelligence for Security Research

Quick Facts

Website
securitytrails.com
Pricing Starts At
Contact sales
Free Tier
No current public free-tier terms
Category
DNS and infrastructure APIs, WHOIS and RDAP APIs, Threat and vulnerability intelligence APIs
TLD Coverage
320M+ domains indexed
Enterprise Plan
Custom pricing

Overview

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

Pros & Cons

Pros

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

Cons

  • Enterprise pricing not transparent
  • Limited free tier
  • Security-focused, not for domain registration

Compare with DomScan →

See how SecurityTrails compares to DomScan across features, pricing, and TLD coverage.

SecurityTrails vs DomScan

Feature SecurityTrails DomScan
Free Tier ✓ 10,000/month
Domain Availability
WHOIS Data
DNS Lookup
Domain Valuation
Brand Monitoring Limited
MCP/AI Integration
Bulk Operations

See full comparison →

Sources

Last updated:

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