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.
Free tier with limited searches and lookup API accessWhoxy
WHOIS history, reverse WHOIS, and bulk lookup API
Whoxy focuses on live WHOIS, historical WHOIS, reverse WHOIS, and batch lookup workflows for researchers, resellers, and brand-protection teams.
Signup test credits; general allowance not publicly statedPricing Comparison
| Pricing | Censys | Whoxy |
|---|---|---|
| Free Tier | Free tier with limited searches and lookup API access | Signup test credits; general allowance not publicly stated |
| Paid Plans | Prepaid credits from $100 | $2 one-time for 1,000 WHOIS lookups |
| Enterprise | Core and Adversary Investigation are custom priced | $10,000 one-time for 25 million WHOIS lookups |
| TLD Coverage | Full IPv4/IPv6 coverage | 1,595 TLDs |
Feature Comparison
| Feature | Censys | Whoxy |
|---|---|---|
| Free Tier | Limited | Limited |
| API Access | Included | Included |
| Bulk Operations | Included | Included |
| Real-time Data | Included | Included |
| WHOIS Data | Limited | Included |
| DNS Lookup | Included | Included |
| Domain Valuation | Not Included | Not Included |
| Brand Monitoring | Not Included | Limited |
| 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 Whoxy if you need
- Strong historical WHOIS and reverse WHOIS coverage
- Pay-as-you-go entry point for batch research
- Good fit for WHOIS-heavy investigations and reseller tools
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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