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Best for: Reverse engineering a binary when you need a decompiler and cannot pay for IDA

Best for: Debugging and patching Windows binaries during reverse engineering

Free and open source under Apache 2.0, released by the NSA.

Free and open source under the GPLv3.

• A genuinely capable decompiler producing C-like output, free and open source
• Very wide processor instruction set and executable format support
• Built for teams, with shared projects and version tracking
• Extensible with Java or Python, and scriptable for automated analysis

• IDA-like sidebar, jump arrows and token highlighting make it immediately readable
• Import reconstruction with Scylla and a built-in assembler for patching
• Yara pattern matching and a Snowman decompiler included
• A scriptable, debuggable automation language plus a growing plugin API

• The project warns that some versions have known security vulnerabilities
• Java-based, and the interface shows it
• A steep learning curve even for people who know assembly
• Distributed as a portable archive rather than an installer, and needs a JDK

• Windows only
• Antivirus software frequently flags it and the things it is used on
• PDB symbol support is basic compared with a commercial debugger
• The decompiler is far weaker than Ghidra's or IDA's

• Official website
• Full listing and sources

Sources for Ghidra

• github.com/NationalSecurityAgency/ghidra

Catalog checked September 21, 2026

• Official website
• Full listing and sources

Sources for x64dbg

• github.com/x64dbg/x64dbg

Catalog checked September 21, 2026