I have used it in my previous company. In my current company, which I have joined recently, we don't use any of these tools. That's why I want to implement something for the company. I have the Community Edition of SonarQube. I am using one version prior to the latest one.
It was integrated with our build pipeline, and we had also customized the rules for the quality gate. For each release that got through SonarQube, it gave the results in terms of whether it was releasable or not.
SLA was another use case. We internally had a rule that in case there are severity defects, they need to be fixed. If there is a false positive, it needs to be justified. That's the way it was used.