GrammaTech DDisasm vs xortool.py: Side-by-Side Comparison (2026)

GrammaTech DDisasm: Fast disassembler producing reassemblable assembly code using Datalog. built by GrammaTech. Core capabilities include ELF file parsing and instruction decoding, Datalog-based disassembly rules and heuristics, Code location identification..

xortool.py: A Python 3 tool for analyzing XOR-encrypted data that can guess key lengths and decrypt XOR ciphers based on character frequency analysis..

Both serve the Malware Analysis market but differ in approach, feature depth, and target audience.

GrammaTech DDisasm is developed by GrammaTech. xortool.py is open-source with 1,476 GitHub stars. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

GrammaTech DDisasm and xortool.py serve similar Malware Analysis use cases: both are Malware Analysis tools, both cover Reverse Engineering, Open Source. Key differences: xortool.py is open-source. Review the feature comparison above to determine which fits your requirements.