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 queriesMxToolBox
Email Security & DNS Diagnostic Tools
MxToolBox specializes in email deliverability tools including MX lookups, blacklist monitoring, SPF/DKIM/DMARC validation, and DNS diagnostics.
Limited free lookupsPricing Comparison
| Pricing | Censys | MxToolBox |
|---|---|---|
| Free Tier | Community tier with limited monthly queries | Limited free lookups |
| Paid Plans | Individual plans from $100/month | From $99/month |
| Enterprise | Custom team and enterprise plans | Enterprise plans available |
| TLD Coverage | Full IPv4/IPv6 coverage | All domains supported |
Feature Comparison
| Feature | Censys | MxToolBox |
|---|---|---|
| Free Tier | Limited | Limited |
| API Access | Included | Included |
| Bulk Operations | Included | Included |
| Real-time Data | Included | Included |
| WHOIS Data | Limited | Not Included |
| DNS Lookup | Included | Included |
| Domain Valuation | Not Included | Not Included |
| Brand Monitoring | Not Included | 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 MxToolBox if you need
- Best-in-class email diagnostics
- Blacklist monitoring
- SPF/DKIM/DMARC validation
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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10,000 free credits/month • No credit card required
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