Censys vs Cloudflare Registrar - 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

Cloudflare Registrar

At-Cost Registrar with Beta API Workflows

Cloudflare Registrar keeps domains at wholesale rates and now exposes beta API flows for search, availability, pricing, and registration on supported domains.

At-cost wholesale pricing

Pricing Comparison

Pricing	Censys	Cloudflare Registrar
Free Tier	Community tier with limited monthly queries	At-cost wholesale pricing
Paid Plans	Individual plans from $100/month	Registrar API beta for supported domains
Enterprise	Custom team and enterprise plans	Enterprise and registrar workflows
TLD Coverage	Full IPv4/IPv6 coverage	400+ TLDs

Feature Comparison

Feature	Censys	Cloudflare Registrar
Free Tier	Limited	Included
API Access	Included	Limited
Bulk Operations	Included	Included
Real-time Data	Included	Limited
WHOIS Data	Limited	Limited
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 Cloudflare Registrar if you need

Zero markup on domains
Beta API can check up to 20 domains at once
Free DNSSEC, CDN, and SSL

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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