Both sonatype (makers of maven, Nexus, and maintainers of central report) and jfrog (makers of artifactory) have cloud based solutions.
But they are mostly not gratis.
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I'm not familiar with Java tooling, but I read about it and it seems like nexus.
If you're familiar with docker it's like a docker registry.
I think the unique value here is that it's a cloud based solution from the mighty Github.
Both sonatype (makers of maven, Nexus, and maintainers of central report) and jfrog (makers of artifactory) have cloud based solutions.
But they are mostly not gratis.