ActiveState Library vs ILSpy: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
ActiveState Library is a commercial software composition analysis tool by ActiveState. ILSpy is a free malware analysis tool. Compare features, ratings, integrations, and community reviews side by side to find the best software composition analysis fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
CST VerdictBased on our analysis of core features, company size fit, deployment model, here is our conclusion:
.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.
Data verified Oct 2026
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