Lots of comments here about what this means for CircleCI. Found it interesting that CircleCI's CEO has a testimonial in the "What our community is saying" at https://github.com/features/actions : “CircleCI has been building a CI/CD platform since 2011, and GitHub has been a great partner. GitHub Actions is further validation that CI/CD is critical for the success of every software team. We believe that developers thr…
Although it's possible they can successfully position themselves as the premium upgrade, it's hard to see how this isn't a threat to CircleCI.