Ask HN: Best self-hosted tool for code reviews?

I'm curious what other developers are happy using. Normally I'd go for Crucible, but have just learned that it's development has been stopped and it's in a maintenance-only mode [0]. GitLab is also an option, but for some reasons it is not as straightforward to integrate it with our setup; are there any other recommendations? [0] https://www.atlassian.com/software/crucible/pricing