Scapy

Scapy is ranked #4 of 33 in network packet analyzer software on The Geeks Club. It runs on API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

Scapy plans and pricing

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Scapy Free GPLv2 license · Python 3.7+ scapy.net · 2 Oct 2026

Compared on network packet analyzer software

Free plan: Yes
Traffic decryption: Yes

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Scapy

Purpose: Scapy is a Python packet manipulation program and library that can forge or decode packets, send and capture them, and match requests with replies.
Shell and library: Scapy can be used as an interactive shell or as a library.
Network tasks: The project lists scanning, tracerouting, probing, unit tests, and network discovery among Scapy’s uses.
Packet handling: Scapy can read and store packets in pcap files and can inject invalid frames and custom 802.11 frames.
Protocol extensions: The documentation includes instructions for adding new protocols and extending Scapy with add-ons.
Platform support: Scapy runs on Linux, macOS, BSD, and Windows; Windows installation requires Npcap.
Optional dependencies: Plotting requires Matplotlib, while TLS decryption and PKI operations require the cryptography package.
Security reporting: GitHub’s security page says the project has not set up a SECURITY.md file and provides a vulnerability reporting link.
License: Scapy’s code, tests, and tools are licensed under GPL v2.
Intended audiences: The project metadata lists developers, IT, science and research, system administrators, and telecommunications as intended audiences.
Documentation: The project provides online documentation with installation instructions, usage guides, troubleshooting, and an API reference.
Use cases: Scapy supports scanning, tracerouting, probing, unit tests, attacks and network discovery.
Interactive modes: Scapy can be used as an interactive shell or as a library.
Packet flexibility: Users can set arbitrary field values and stack protocol layers without predetermined templates.
Price from: Free

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Where it ranks on The Geeks Club

Best Network Packet Analyzer Software in 2026#4 of 33
Best Network Protocol Analyzers in 2026#3 of 30

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Sources

github.com/secdev/scapy· checked 30 Sept 2026
scapy.readthedocs.io/en/latest/· checked 30 Sept 2026
scapy.readthedocs.io/en/latest/installation.html· checked 30 Sept 2026
github.com/secdev/scapy/security/policy· checked 30 Sept 2026
github.com/secdev/scapy/blob/master/pyproject.toml· checked 30 Sept 2026
scapy.readthedocs.io/en/latest/introduction.html· checked 2 Oct 2026
scapy.readthedocs.io/en/stable/installation.html· checked 2 Oct 2026
github.com/secdev/scapy/blob/master/SECURITY.md· checked 2 Oct 2026
scapy.net· checked 2 Oct 2026