Best PreEmptive JSDefender Alternatives & Competitors in 2026

PreEmptive Dotfuscator

C# obfuscation & encryption tool for .NET, MAUI, and Xamarin apps

Emproof Nyx - Python Protection

Python3 code protection against reverse engineering via opcode obfuscation.

Digital.ai Application Security

App hardening platform with RASP, obfuscation, and threat monitoring.

ELFcrypt

ELFcrypt encrypts ELF binaries with obfuscation and anti-debugging features to protect against reverse engineering.

OneSpan Product

Mobile app security solution protecting against reverse engineering & attacks

Wultra In-App Protection

Mobile app shielding and in-app protection for mobile applications

Miggo Security

Application monitoring and security platform that provides runtime visibility, threat detection, and automated response capabilities for application-layer security

Raven Runtime Application Protection

Runtime app protection with function-level reachability and exploit prevention

Contrast ContrastProtect

Runtime Application Self-Protection (RASP) for apps and APIs

Contrast Application Detection and Response (ADR)

Runtime protection for apps and APIs detecting and blocking exploits and attacks

Aikido Zen

Runtime application security library blocking zero-days & OWASP Top 10 attacks

Miggo Prove Next-Gen Runtime Vulnerability Prioritization

Runtime vulnerability prioritization using code execution and attack path analysis

Raven Runtime Prevention

Runtime protection preventing supply-chain attacks & exploits via library-level policies

GrammaTech ARTCAT

Runtime monitoring and automated mitigation for execution anomalies

Source Defense How it works

Client-side security for websites against 3rd party vendor attacks

Source Defense Platform

Client-side security platform protecting against JavaScript-based threats

Monarx Threat Shield

Real-time web application firewall with runtime protection for PHP apps

Approov Runtime Application Self Protection

RASP solution securing mobile apps and APIs across Android, iOS, and HarmonyOS at runtime.

Build38 Active Hardening

AI-driven mobile app hardening with cryptographic individualization

Arcjet

Developer-first security SDK for bot detection, rate limiting, and attack protection

Jscrambler Webpage Integrity

Client-side platform for controlling third-party script behavior and preventing data

Jscrambler Client-Side Protection and Compliance Platform

Client-side JS obfuscation and third-party script protection platform with compliance.

c/side

Client-side platform securing browser scripts, detecting fraud & ensuring PCI compliance.

DoveRunner Mobile App Security

Runtime RASP platform securing Android & iOS apps with no-code deployment.

Akamai Client-Side Protection & Compliance

Akamai Client-Side Protection & Compliance is a security tool that monitors and protects against client-side threats on websites, aiding in PCI DSS v4.0 compliance.

Alma Platform

Runtime app security platform for ADR, data flow tracking, and threat modeling.

Everspin EverSafe Web

Real-time web service protection using AI-MTD (Moving Target Defense) tech.

Pradeo RASP

Mobile RASP solution offering in-app threat detection and automated protection.

CLR Anti-Debugger/Profiler Code

Code to prevent a managed .NET debugger/profiler from working.

Nuxt Security

A Nuxt 3 security module that automatically implements OWASP security patterns through HTTP headers, middleware, and various protection mechanisms including CSP, XSS validation, CORS, and CSRF protection.

OpenRASP

OpenRASP is a runtime application self-protection solution that integrates into application servers to monitor and block threats in real-time using context-aware instrumentation.

DOMPurify

DOMPurify is a fast XSS sanitizer for HTML, MathML, and SVG.

@fastify/helmet

A Fastify plugin that implements HTTP security headers through a wrapper around the helmet library to protect web applications from common vulnerabilities.

NoPP

Protect against Prototype Pollution vulnerabilities in your application by freezing JavaScript objects.