We are studying this internally. We are finding out that this might actually not be the case: > The source code authored by us in this repo is licensed under t

We are studying this internally. We are finding out that this might actually not be the case: > The source code authored by us in this repo is licensed under the Apache v2, however, we do not claim to be an open source project. > [...] > Additional minified JavaScript files and Java libraries are used in this project. All of the licenses are deemed compatible with the Apache 2.0, nothing is GPL or AGPL, due dilgence is performed on all third-party code. Here's an issue that was opened 5 days ago that probably triggered the README rephrasing: https://github.com/jgraph/drawio/issues/3782 https://github.com/jgraph/drawio/issues/3782 > The file for converting the mermaid code to mxgaph xml is available only in minified version. the unminified version "mermaid2drawio.js" is missing. Please include that. Answer: > We do not supply the source to that file. With such phrasing, for now, I'll consider drawio proprietary with some parts in Apache 2 (even if it's actually the majority of the code). It might be possible to have a fork with some optional features related to these non provided files removed, if by luck no critical feature is impacted. (or, even better, provide an alternative, open source implementation for these files, of course)