Could I ask what tech you're using for the graph data? I'm working on a similar SaaS (not analytics) which requires graphs. I'm a DevOps engineer for an ISP, and I do a lot of work with things like Graphite/Carbon, Prometheus and so on - but I can't seem to settle on what to use for personal projects. Do you use a TSDB at all? Or are you just storing it in SQL for now?