Free MXToolbox Alternative

MXToolbox is a well-established network diagnostics service with a broad toolset. Many features require a paid account ($129–$199/month) or hit rate limits on the free tier. NetDig offers a comparable and in many ways broader free toolset with no limits, no account required, and no ads.

Feature Comparison

Where NetDig Has More

• Blacklist checking — MXToolbox's full 100+ list check requires a paid account. NetDig checks 30+ critical lists free.
• No rate limits — MXToolbox limits free users on lookups per day. NetDig has no limits.
• DNS Record Builder — generates copy-ready DNS records for 25+ services. No MXToolbox equivalent.
• DNS Benchmark — compares resolver response times. Unique to NetDig.
• SSL Chain Visualizer — shows full cert chain with missing intermediate detection. MXToolbox is paid.
• Tech Stack Detector — identifies CMS, CDN, email provider from headers and DNS.
• No ads — MXToolbox's free tier is heavily ad-supported.

Where MXToolbox Excels

• More extensive blacklist coverage (100+ lists on paid plan)
• Historical monitoring and alerting for domain health
• Email health score dashboard
• Network diagnostics (traceroute, ping from multiple locations)
• Long track record and broader enterprise feature set

Bottom Line

For most users who need quick DNS lookups, email authentication checks, blacklist checks, and SSL validation — NetDig is the better free alternative. No account, no ads, no rate limits. For enterprise monitoring with alerts and historical tracking, MXToolbox's paid plans add value NetDig doesn't currently offer.