GrammaTech DDisasm vs Viper: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
GrammaTech DDisasm is a free digital forensics and incident response tool by GrammaTech. Viper is a free digital forensics and incident response tool. Compare features, ratings, integrations, and community reviews side by side to find the best digital forensics and incident response fit for your security stack.
CST VerdictBased on our analysis of core features, integrations, here is our conclusion:
Reverse engineers and incident responders analyzing malware or firmware need DDisasm when binary instrumentation demands reassemblable code; its Datalog-driven disassembly rules catch function boundaries and symbolization patterns that linear disassemblers miss, and the GTIRB intermediate representation output lets you pipe results into custom analysis pipelines without manual translation. Skip this if your team needs GUI-driven interactive debugging or handles primarily x86-64 user-space binaries where IDA Pro's existing plugins already work; DDisasm shines on embedded architectures and cases where you're building automation around disassembly, not clicking through a debugger.
Malware analysts and incident responders who need to rapidly triage and organize thousands of samples will find Viper's plugin architecture invaluable; you can extend the framework to automate your lab's specific workflows instead of retrofitting commercial tools around them. The free, open-source model means zero licensing friction across your team and the ability to modify core functionality when vendor roadmaps don't align with your priorities. Skip Viper if your organization lacks in-house Python developers or expects vendor-backed technical support; you're maintaining and extending this yourself.
