Scapy
A powerful packet manipulation library for network analysis and security.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is Scapy?
Scapy is a robust Python-based library that allows users to craft, send, capture, and dissect packets at various layers of the network stack. It's widely used in network testing, security assessments, and educational purposes due to its flexibility and comprehensive feature set.
Key differentiator
“Scapy stands out with its comprehensive support for crafting and analyzing packets at various network layers, making it an indispensable tool for developers and security professionals who require precise control over the network stack.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
Scapy's API requires familiarity with Python-specific patterns and idioms, which can be challenging for developers without a strong background in Python.
Upgrading from v2.4.x to v3.x required significant code rewrites due to major API changes, impacting existing scripts and workflows.
Scapy's core library does not natively support the latest network protocols such as QUIC or certain IoT-specific protocols without additional modules or patches.
Processing large volumes of packets can lead to significant performance degradation and memory usage, making it less suitable for real-time network monitoring at scale.
Fit analysis
Who is it for?
✓ Best for
Network security researchers who need precise control over packet crafting and analysis.
Educators teaching networking concepts, as it provides a practical tool for demonstrations.
Developers working on custom network applications that require low-level packet manipulation.
✕ Not a fit for
Projects requiring real-time streaming of large volumes of data due to performance limitations.
Users looking for a graphical user interface (GUI) for packet analysis, as Scapy is primarily command-line based.
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Works well with
Next step
Get Started with Scapy
Step-by-step setup guide with code examples and common gotchas.