I guess I misread your comment... my apologies. What I'm building is more a replacement for Splunk: on-prem log analytics. As you point out, it is not compatible w/Elasticsearch in any way.
Wow, you really are swinging for the fences, then. I wish you all the best, because running Splunk is terrible, and ripe for replacement, but its search featureset and UX are massive so I hope you are laser focused on who the target audience is for your product
Looking for some small niche... Industrial, automotive, even garbage truck monitoring :-) I'm not looking to build a massive public company or anything either... More a lifestyle business. We'll see.