Side by side

Caido vs Kali Linux

Both stand on penetration testing software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Caido

Free plan APILinuxMac+3

Caido combines proxy-based traffic review with filtering, workflows, and connections to existing LLM providers. Its free Basic plan has stated project, workflow, plugin, and session limits; paid access is listed from $20/user/mo.

Visit Caido

Kali Linux

Free plan Open source AndroidLinuxMac+2

Kali Linux offers a broad security-testing environment across many deployment types, with live and custom-image options. Its intended audience is experienced users, and official support is limited to the operating system and packaging.

Visit Kali Linux

The facts

	Caido	Kali Linux
Free plan	Yes	Yes
Open source	Not published	Yes
Runs on	API, Linux, Mac, Self-hosted, Web, Windows	Android, Linux, Mac, Self-hosted, Windows
Lowest paid plan	Free or on request	Free or on request
Plans published	5	1
Maker	Not published	Not published
Website	caido.io	kali.org
On penetration testing software	#4 of 34	#1 of 34

Caido: what it does well

Proxy handles HTTP and WebSocket traffic.
HTTPQL filters requests and responses.
Workflows support ad-hoc automation.
Users can connect existing LLM providers.
Basic is free forever.

What to know first

Basic allows only three plugins.
Basic allows two projects.
Basic allows one pipeline session at a time.
No free trial is listed.

Kali Linux: what it does well

Free of charge.
Supports live USB use without altering the host OS.
Custom ISO images can be built.
Packages and repositories are signed.
Available across virtual, cloud, container, and ARM environments.

What to know first

Documentation assumes Linux familiarity.
Official support excludes penetration-testing and tool-use help.
Some tools in the non-free section are not open source.
Unsupported repositories can break Kali.

Alternatives to Caido Alternatives to Kali Linux The whole list