Ask HN: Code review tools

We've been using Gitlab's merge request resolution/code review tool for as long as I've worked here (9 months). However, it seems like Gitlab has gone and broken a good workflow: previously, a line in the diff marked with a comment would be marked resolved whenever the next commit would touch that same line on the diff. Now the line has to manually be marked--I can see validity to this, but maybe I just don't like change.

Anyway, I'm just curious of any other code review tools (which don't send our code anywhere questionable) which allow for similar functionality. Please note, we're pretty sold on the Gitlab kool-aid for now, so switching off doesn't seem viable.