Open source and attributions

Short answer: ZipGood bundles open-source compression engines — 7-Zip, The Unarchiver (XADMaster), Zstandard, Brotli, lzlib and LRZIP — each used under the terms of its own licence. The full licence texts ship inside the app under Settings → About.

Open source in ZipGood

ZipGood is built on the work of several open-source projects. This page lists them so the attribution is available outside the app as well as inside it.

The authoritative list of bundled components and their licences is published in the app under Settings → About.

Attributions

Each project below is used under the terms of its own licence. The licence family is listed for reference; the full licence text ships with the app.

Bundled components

Bundled open-source components and licences
Component Project Licence family Project site
7-Zip 7-Zip project (Igor Pavlov) GNU LGPL (with unRAR restriction for RAR code) Visit project
The Unarchiver / XADMaster The Unarchiver (MacPaw) GNU LGPL Visit project
Zstandard (zstd) Meta / Facebook BSD 3-Clause Visit project
Brotli Google MIT Visit project
lzlib GNU lzip project (Antonio Diaz Diaz) GNU GPL Visit project
LRZIP LRZIP project (Con Kolivas) GNU GPL Visit project

Licence families are indicative only and are not a substitute for the licence text. Always refer to the licence shipped with the app for authoritative terms.

Frequently Asked Questions

Is ZipGood open source?

No. ZipGood itself is a proprietary app distributed through the Mac App Store. It bundles several open-source compression engines, which are listed on this page.

Where are the licence texts?

The licence texts ship inside the app. Open Settings → About in ZipGood to see the full list of bundled components and their licences.

Sources

Product facts on this page were last verified on October 2, 2026.