draw.io no longer open source since August 27, 2024 - eviltoast
License Change from standard Apache 2.0 license · jgraph drawio · Discussion #4623
github.com
From today the license applied to the project will be the Apache 2.0 license with an extra line forbidding usage of the codebase as an integration or app to Atlassian's Confluence or Jira products....