For an (offline) alternative, check out → https://github.com/similarweb/finala (written in Go)

I started using Finala a couple of months ago out of experimentation, it works well, but you need to tweak the configuration a lot to help the tool understand your infrastructure, spending habits and normal usage. My colleagues are very happy with the results, we started saving ±1.8k per month, which is pocket change for our scale but is still money that we can spend on other things.