Burp Suite Community Edition
Security & privacy
A web security testing toolkit (free Community Edition).
Available for Windows, macOS, Linux

An open-source web application security scanner.
Official source: zaproxy.orgLast verified: awaiting review · How we check softwareDeveloper: ZAP project
ZAP (formerly OWASP ZAP) sits between your browser and a web application to find security issues, with both automated scanning and manual testing tools. Use it only on applications you're authorised to test.
Open Source Open Source
Open source: the source code is public, so anyone can inspect it, and it's free to use.
Prices change, so check zaproxy.org for current pricing.
PS> winget install --id ZAP.ZAP --exact --source winget$ flatpak install flathub org.zaproxy.ZAPPackage names were checked against each official package registry, and commands install the same software as the official download. Only run commands you understand.
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Security & privacy
A web security testing toolkit (free Community Edition).
Available for Windows, macOS, Linux
Networking
Network protocol analyser for capturing and inspecting traffic.
Available for Windows, macOS, Linux
ZAP is open source.
ZAP is available for Windows, macOS and Linux. It isn't available for Android and iPhone & iPad.
Yes. Run "winget install --id ZAP.ZAP --exact --source winget" in PowerShell or Windows Terminal. The package ID was checked against Microsoft's official Winget repository.
Yes. Run "brew install --cask zap" in Terminal.
From the official website, zaproxy.org. Aptorise links only to official sources and never hosts installers.