Locally, I'm using gitolite+cgit. I was previously using Gitea, but that didn't suit my requirements.

I'm using GitHub for my open source projects as:

1. While GitHub Actions has its issues and doesn't work for everyone, I've found it easy to build and test an IntelliJ plugin against multiple IntelliJ versions.

2. I don't have to pay for and manage the hosting of the git repository.