We use Grafana for our own internal usage (albeit we do have customer viewable analytics but it is proprietary hardcoded panes).

I suppose you are confused because of my mentioning building product based on shindig. That was a previous employment many moons ago. I now am a many hat wearing owner of a SaaS.

While I'm speaking of Grafana I find Kibana for more useful probably because we have a lower level of traffic than big boys but still produce an atrocious amount of logging. Logs are damn useful. In some ways metrics are actually a subset of event aggregation (ie logs) so I think Kibana is more useful at first.