Inspectrum is a tool for analysing captured wireless signals. It is a free and open-source software.
Best gr-gsm Alternatives ranked by AI · updated Aug 2026
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gr-gsm is an open-source GNU Radio toolkit for receiving and analyzing GSM cellular signals. It is intended for researchers and security practitioners working specifically with legacy 2G networks, offering GSM-focused demodulation, decoding, and monitoring components.
Top 6 gr-gsm alternatives
GNU Radio is a free and open-source software development toolkit that provides signal processing blocks to implement software radios.
SDRangel is an open-source software-defined radio (SDR) application that supports various SDR hardware devices. It provides a user-friendly interface for radio frequency...
Universal Radio Hacker is an open-source toolkit for capturing, analyzing, and manipulating wireless signals with software-defined radios. It is aimed at security...
Pros
- Purpose-built for reverse-engineering unknown wireless protocols
- Supports signal recording, demodulation, fuzzing, and protocol visualization
- Works with multiple SDR hardware devices
Cons
- Steeper learning curve than general-purpose SDR receivers
- Less suitable for building complex custom DSP flowgraphs than GNU Radio
- Hardware setup and protocol interpretation require substantial RF knowledge
SDR++ is a cross-platform software-defined radio receiver with spectrum, waterfall, demodulation, and recording features. It serves radio amateurs and RF hobbyists who...
Pros
- Faster and more polished than many hobbyist SDR applications
- Supports a broad range of SDR hardware and network sources
- Includes receiver, waterfall, recording, and plugin capabilities
Cons
- More complex than a dedicated spectrum-only tool
- Some advanced features require plugin configuration
- User interface is less beginner-oriented than basic SDR receivers
Free, open source
6
SigDigger
f4exb and contributors
SigDigger is an open-source signal analyzer and SDR receiver designed for inspecting, demodulating, and recording radio signals. It serves radio engineers, experimenters,...
Pros
- More convenient for live spectrum monitoring than Universal Radio Hacker
- Includes measurement, demodulation, recording, and signal-inspection tools
- Supports common SDR hardware through SoapySDR
Cons
- Provides less dedicated protocol-reconstruction functionality than URH
- Not designed around message fuzzing or automated protocol inference
- Advanced workflows still require external decoders or scripts
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