I've found https://reportportal.io/ which seems like an ideal fit but will be complex to manage (microservices + postgres + rabbit + elasticsearch). TestRail might be good, will need to evaluate it, although it's more expensive than I would expect. I think that TeamCity has a decent view of test results but it's a full-blown CI system, more than I need.
Is there some other tool that you'd suggest? Preferably a managed offering.