JADX

Dex2Jar converts .dex files to .jar files, which can then be analyzed with Java decompilers. JADX also decompiles .dex files to Java source code, making Dex2Jar a partial competitor as a step in decompilation workflows.

JEB is a disassembler and decompiler for Android applications and native code, similar to JADX, providing code analysis and debugging capabilities, making them direct competitors.

Ghidra is a software reverse engineering (SRE) framework. While JADX primarily focuses on decompiling Java code from DEX files, Ghidra can decompile to Java as well as other languages and also perform disassembly. Thus, they compete in their capacity to provide decompilation and disassembly capabilities.

IDA Pro is a disassembler and debugger that can be used to reverse engineer software. It is a strong competitor to JADX, especially for native code analysis, even though JADX focuses more on Java decompilation from Android applications. However, IDA Pro is a much more complete reverse engineering tool than JADX, so they can be used together.

Frida is a dynamic instrumentation toolkit. It allows you to inject snippets of JavaScript or your own native code into native applications. Frida can be used to analyze the runtime behavior of applications decompiled by JADX.

APKTool is used for reverse engineering Android APK files. It can decode resources to nearly original form and rebuild them after making some modifications. While JADX focuses on decompilation of dex files to Java code, Apktool is mostly focused on decoding resources. They are used together to fully reverse engineer an APK.