How we compare

Honest head-to-head comparisons with the other .NET obfuscators, including the cases where they are clearly the better tool for what you are doing.

Read these sceptically. We make one of the products being compared. We have tried to be accurate and to say plainly where each competitor wins — but verify anything that matters with the vendor. Reviewed October 2026.
Open source vs ConfuserEx The strongest free .NET protector — and the highest setup cost. Read the comparison → PreEmptive Solutions vs Dotfuscator The commercial incumbent, with a deliberately limited free tier. Read the comparison → Eziriz vs .NET Reactor Local protection and licensing, with documented IDE and CI integrations. Read the comparison → Redgate vs SmartAssembly Obfuscation bundled with production error reporting. Read the comparison → Open source vs Obfuscar Maintained, MSBuild-native renaming — configured in XML. Read the comparison → Gapotchenko vs Eazfuscator.NET Local build integration, code/data virtualization and edition-specific licensing. Read the comparison → LogicNP Software vs Crypto Obfuscator for .NET A broad protection suite — encryption, anti-debug, anti-tamper, error reporting. Read the comparison → Softanics vs ArmDot Commercial, cross-platform, with code virtualization. Read the comparison → RustemSoft vs Opaquer Commercial .NET obfuscator with a free Basic edition and CLI automation. Read the comparison →

The short version

FreeObfuscator does symbol renaming, string encryption, control-flow obfuscation, call-reference proxying, and optional method virtualization. It has no anti-debugging or general assembly anti-tampering, and it is not a product-licensing system. The optional Pro VM-bytecode integrity check has a narrower scope. Some tools on this page go further in those areas; if you need them, use one of them.

Our workflow processes uploaded assemblies without a local installation. Free renaming and optional Pro transforms have different limits; compare them against your actual deployment requirements and inspect the measured output.

If you are weighing this up, read what obfuscation actually protects against first. Deciding how much protection you need is a better starting point than comparing feature tables.