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Email Spam Filtering Software

Cloudflare

cloudflare.com · checked 13 Nov 2026

How it plugs in

—Public API
NoOpen source
YesFree tier

Signal on Email Spam Filtering Software5.8#1 of 11

Pricing

  • Free PlanFree
  • Pay-as-you-go$7/mo
  • Contract PlanOn request
  • Free (Cloudflare One)$0 forever · 50 users; community forums + Discord support; up to 24 hours standard log retentionFree
  • Free (Network & CDN)$0/month · For personal or hobby projects that aren't business-criticalFree
  • Pay-as-you-go (Cloudflare One)$7/user/month · No user limit; chat and ticket support; up to 30 days standard log retention$7/mo
  • Pro$20/mo billed annually, or $25/mo billed monthly · For professional websites that aren't business-critical$20/mo
  • Business$200/mo billed annually, or $250/mo billed monthly · For small businesses operating online$200/mo

As cloudflare.com lists them, checked 25 Oct 2026.