Censys vs WHOISJSON - Domain API Comparison

Overview

Censys

Internet Intelligence and Attack Surface Platform

Censys delivers internet-wide scanning, certificate intelligence, and external attack surface discovery for security teams and researchers.

Community tier with limited monthly queries

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	Censys	WHOISJSON
Free Tier	Community tier with limited monthly queries	Free plan available
Paid Plans	Individual plans from $100/month	From $10/month
Enterprise	Custom team and enterprise plans	Higher-volume plans available
TLD Coverage	Full IPv4/IPv6 coverage	1,500+ TLDs

Feature Comparison

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

Which is Better?

Choose Censys if you need

Comprehensive internet scanning
Certificate and asset intelligence
External attack surface discovery

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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