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 queriesDynadot API
Registrar API for Bulk Investors and Resellers
Dynadot offers REST and legacy APIs with 120+ actions covering registration, transfers, DNS, aftermarket workflows, and bulk investor tooling.
Regular tier: free API accessPricing Comparison
| Pricing | Censys | Dynadot API |
|---|---|---|
| Free Tier | Community tier with limited monthly queries | Regular tier: free API access |
| Paid Plans | Individual plans from $100/month | Bulk: $500+/year spend |
| Enterprise | Custom team and enterprise plans | Super bulk: $5,000+/year spend |
| TLD Coverage | Full IPv4/IPv6 coverage | 500+ TLDs |
Feature Comparison
| Feature | Censys | Dynadot API |
|---|---|---|
| Free Tier | Limited | Not Included |
| API Access | Included | Limited |
| Bulk Operations | Included | Included |
| Real-time Data | Included | Included |
| WHOIS Data | Limited | Included |
| DNS Lookup | Included | Limited |
| Domain Valuation | Not Included | 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 Dynadot API if you need
- Excellent for domain investors
- Low-cost domain pricing
- 120+ domain and aftermarket actions
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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