In GitLab we have shared group/instance runners now as well as multiproject pipelines.

https://docs.gitlab.com/ee/ci/multi_project_pipelines.html

https://docs.gitlab.com/ee/ci/runners/#shared-specific-and-g...

We are focusing on improving the new user experience here, so OP if you decide to try out GitLab I'd love to hear what works well and what doesn't.