Side by side

Colasoft Capsa vs Scapy

Both stand on network protocol analyzers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Colasoft Capsa

Free plan Windows

Capsa combines packet inspection, network diagnosis, security analysis, and reporting in a Windows desktop tool. Check the edition limits and listed prices against the scale and type of monitoring you need.

Visit Colasoft Capsa

Scapy

Free plan APILinuxMac+3

Scapy offers packet-level flexibility for users comfortable working with Python and network protocols. Check platform and optional-package requirements for the tasks you need.

Visit Scapy

The facts

	Colasoft Capsa	Scapy
Free plan	Yes	Yes
Open source	No	Not published
Runs on	Windows	API, Linux, Mac, Self-hosted, Web, Windows
Lowest paid plan	Capsa Standard: $295, paid once	Free or on request
Plans published	4	1
Maker	Not published	Not published
Website	colasoft.com	scapy.net
On network protocol analyzers	#8 of 30	#12 of 30

Colasoft Capsa: what it does well

Analyzes more than 1,800 protocols and sub-protocols.
Diagnoses network problems and suggests solutions.
Detects several listed attacks and suspicious conversations.
Schedules capture once, daily, or weekly.
Includes email or sound alarm notifications.

What to know first

Windows platform only.
Free edition does not monitor WiFi connections.
Free sessions time out after four hours.
Professional costs $695, paid once.

Scapy: what it does well

Works as an interactive shell or a Python library.
Supports packet capture and pcap files.
Users can set field values and stack protocols.
Documentation includes usage guides and an API reference.
Free under GPL v2.

What to know first

Windows installation requires Npcap.
Plotting requires Matplotlib.
TLS decryption and PKI operations require cryptography.
Project supports only the latest master version.

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