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ZAP vs Caido: catalog facts
ZAP	Caido
Free Free and open source under the Apache licence.	Freemium The community edition is free. Automation and collaboration features need a paid plan.
Windows, macOS, Linux, Browser extension	Windows, macOS, Linux, Browser extension
Intercepting proxy plus automated scanning in one free tool API and automation framework make it usable inside CI pipelines	It gives a modern, fast interception proxy with a workflow engine and a plugin system, as a lighter…
Active scanning can damage a live application and must only be run with permission Java application with a heavy interface	The application is closed source, and the free community edition holds back the automation and collaboration features.
Downloadable app, Browser extension	Downloadable app, Browser extension
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.