DomainTools vs WHOISJSON - Domain API Comparison

Overview

DomainTools

Enterprise Domain Intelligence & Threat Research

DomainTools focuses on high-end security workflows with passive DNS, reputation scoring, historical data, and enterprise investigation products.

No free tier

WHOISJSON

WHOIS, DNS, SSL, and availability API with a lightweight free plan

WHOISJSON packages WHOIS, DNS, SSL certificate, and availability lookups into a lightweight API for teams that need practical lookup coverage without enterprise overhead.

Free plan available

Pricing Comparison

Pricing	DomainTools	WHOISJSON
Free Tier	No free tier	Free plan available
Paid Plans	Custom enterprise contracts	From $10/month
Enterprise	Annual platform subscriptions	Higher-volume plans available
TLD Coverage	Hundreds of millions of domains tracked	1,500+ TLDs

Feature Comparison

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

Which is Better?

Choose DomainTools if you need

Decades of historical WHOIS data
Advanced threat intelligence
Iris, DNSDB, and monitoring products

Choose WHOISJSON if you need

Covers WHOIS, DNS, SSL, and availability in one API
Simple entry pricing and low-friction onboarding
Useful free tier for early testing and prototypes

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)
✓ 1,500+ TLDs supported
✓ MCP integration for AI assistants
✓ Domain valuation, brand monitoring, OSINT

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