It probably depends on your scale, but I'd suggest self-hosting a Forgejo instance, if it's within your domain expertise to run a service like that. It's not hard to operate, it will be blazing fast, it provides most of the same capabilities, and you'll be in complete control over the costs and reliability.

A people have replied to you mentioning Codeberg, but that service is intended for Open Source projects, not private commercial work.

This. I have been using Codeberg and self-hosting Forgejo runners and I'm happy. For personal projects though, I don't know for a company.

Also very happy with SourceHut, though it is quite different (Forgejo looks like a clone of GitHub, really). The SourceHut CI is really cool, too.