I'm thinking of running infracost.io POC in my company, and I'm curious if anyone here has used it? any gotchas or limitations to be aware of? Are there alternative services that track cost in Tetraform stacks/code ?

The alternative doesn't look maintained any more https://github.com/terrateamio/openinfraquote

stopped using them the moment they did a rug pull on helm chart for self-hosted variant and didn't communicate about it https://github.com/infracost/infracost/issues/2763

imho, If it's a good product, it's only fair for my company to pay for it…their $1000 plan might be sufficient for us…hopefully saves more 🤞 I’m mostly concerned with unaddressed bugs and/or being too much noise

I'd be mindful about what Ihor said, it's a clear move to push toward monetization and getting the shareholders an ROI on their investments. That 1000$ plan might not be a 1000$ anymore by the time you rolled it out

infracost solves pre-deploy estimation, not post-deploy idle spend. those are two different problems. worth being clear which one you actually need before committing to the $1000. and given what Ihor mentioned about self-hosted, i wouldn't go all-in until you've tested it fits your workflow.