de4dot vs ILSpy: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
de4dot is a free malware analysis tool. ILSpy is a free malware analysis tool. Compare features, ratings, integrations, and community reviews side by side to find the best malware analysis fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Threat analysts and incident responders investigating .NET malware will find de4dot indispensable for unpacking obfuscated assemblies that commercial tools struggle with, especially samples using less common obfuscators like ConfuserEx or .NET Reactor. The tool's 7,364 GitHub stars reflect active community maintenance and real-world deployment across malware analysis workflows. Skip this if your team primarily handles unobfuscated .NET samples or relies on automated sandboxing; de4dot demands manual analysis skill and won't replace behavioral detection.
.NET developers and security researchers doing adversarial code review need ILSpy because it's the only free decompiler that actually handles modern C# constructs and async patterns without mangling the output. Its 24,766 GitHub stars reflect adoption by practitioners who've rejected paid alternatives; the tool's modular frontend architecture means you can pipe decompiled IL into custom analysis scripts instead of staring at a GUI. Skip this if your threat model requires decompiling obfuscated assemblies at scale; ILSpy struggles with commercial packers and gives up where commercial tools like dnSpy push through.
