Imunify360 vs NAXSI

Imunify360

Model: Per-server subscription, tiered by number of hosting accounts

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NAXSI

Model: Free (Open Source, GPLv3)

Free Tier Available View full pricing →

Imunify360

• Managed WAF Rules

  ModSecurity-based WAF with proprietary rules maintained by Imunify's security team. Automatically updated to cover new WordPress plugin vulnerabilities, CMS exploits, and emerging attack patterns.

• Proactive Defense

  Real-time PHP script behavior analysis that detects and blocks malicious activity during execution. Catches zero-day attacks that signature-based WAFs miss entirely.

• Virtual Patching

  Blocks exploit attempts against known vulnerabilities in WordPress plugins, themes, and CMS software before official patches are released or applied.

• WebShield

  Reverse proxy layer that filters bot traffic and mitigates DDoS attacks using invisible JavaScript challenges instead of traditional CAPTCHAs.

• Automated Malware Cleanup

  Detects and removes malicious code from files automatically, preserving the original file integrity. Includes database scanning for CMS infections.

• Global Threat Intelligence

  Feeds from 57M+ protected domains. An attack blocked on one server instantly protects all other Imunify-protected servers worldwide.

• WordPress Plugin

  Dedicated WordPress plugin providing site-level security dashboard, scan results, proactive defense status, and malware details directly in wp-admin.

• Compromised Password Reset

  Automatically forces password resets when it detects that cPanel or WordPress credentials were used in an attack, breaking reinfection cycles.

NAXSI

• Scoring-Based Detection

  Assigns scores to suspicious patterns in requests. Blocks when the cumulative score exceeds a threshold, rather than relying on exact signature matches.

• Learning Mode

  Monitors traffic and automatically generates whitelist rules for legitimate application behavior, reducing manual tuning effort during initial deployment.

• Virtual Patching

  Apply custom rules to block specific vulnerabilities without modifying application code. Rules target raw requests or specific fields like headers, args, and body.

• Deny-by-Default

  Operates like a DROP firewall. Common attack characters and patterns are blocked unless explicitly whitelisted for the target application.

• Lightweight Footprint

  Written in C with only libpcre as a dependency. Adds minimal overhead to NGINX request processing.

• Dynamic Module Support

  Can be compiled as a dynamic NGINX module, allowing it to be loaded without recompiling NGINX from source.