Reko
Reko: A free, extensible decompiler with GUI, CLI, API, scripting, and multi-architecture support. Ranked #5 of 24 in Decompiler Software by our editors (8.4/10); pricing: Free plan; best for free native decompilation across platforms.
At a glance
- Editor score8.4 / 10
- PricingFree plan
- Best forFree native decompilation across platforms
- Free planYes
- Paid fromFree
- Native-code decompilationYes
- Facts checked20 Sep 2026
Where it wins
- Free and open source with no commercial plan structure
- GUI, command-line, .NET API, and runtime library workflows
- Supports multiple architectures, formats, scripts, and plugins
Where it doesn't
- Intended for users familiar with machine code or assembly
- Debugger integration is not a stated strength
- Focused on machine-code executables rather than bytecode
Our verdict on Reko
Reko is an open-source toolchain for decompiling machine-code binary executables into higher-level output. It is aimed at reverse engineers, developers, and analysts who understand machine code or assembly language and need more than a single interface. The project combines a graphical interface for binary analysis with command-line commands for decompilation, disassembly, and dumps. It also provides a runtime library and .NET API for programmatic reverse-engineering workflows.
Cost and workflow flexibility are central to Reko's appeal. It is free and open source, with no commercial plan structure to compare. The published capabilities span Windows, Linux, macOS, and API-based use, allowing the same project to fit desktop analysis, command-line automation, and application-integrated workflows. Multiple processor architectures and executable formats broaden its usefulness, while user-defined scripts can customize decompilation. Byte-pattern search with regular-expression support adds a practical analysis aid, and C# and C++ plugin extensions provide further room for specialized tooling.
Its strongest fit is for technically experienced users who want broad native-code coverage without a license cost and who value extensibility. The combination of GUI, CLI, scripting, APIs, and plugins makes Reko more adaptable than a narrowly focused desktop decompiler. The trade-off is that it is not positioned as an all-purpose reverse-engineering environment: familiarity with machine code or assembly is expected, bytecode decompilation is outside its stated focus, and debugger integration is not a stated strength. Choose Reko for free, cross-platform machine-code decompilation and customizable workflows; choose an alternative if debugger-led investigation or bytecode analysis is a primary requirement.
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Reko pricing
Reko fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Native-code decompilation | Yes |
| Bytecode decompilation | Not verified |
| Debugger integration | Not verified |
| Scripting API | Yes |
| Plugin support | Yes |
| License type | Free |
| Deployment | Desktop, Self-hosted |
| Platforms | Windows, Linux, macOS |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Reko
- GhidraA free, broad toolkit for native-code, Java, and DEX analysis.9.4
- Binary NinjaA broad native reverse-engineering toolkit with perpetual paid licenses and a free plan.9.2
- IDA ProA deep native reverse-engineering suite for teams that need broad architecture support.9.0
Reko vs the competition
Compare Reko with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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