Craft with ElasticSearch as a backend Hope this kind of question (a pointer request, actually) is alright with StackExchange guidelines. We're looking to store all our data in ES. Is this possible at the moment? Any plugin to do so? We're happy to explore Enterprise pricing if needed. 

Thank you!
Although not related specifically to Craft, we built https://www.jelliscraig.com.au website using CraftCMS with all property listing data is stored in ElasticSearch. We use a simple plugin for the ElasticSearch PHP client but the integration is front-end only, for the most part. 
We have been testing pushing Craft generated content into ElasticSearch via the element API and in theory its a workable solution however for our specific situation we see no huge benefit in storing all general content externally.