I'm using both Solr and Elastic right now (on different projects) - second on those items above. One other plus for Solr is it has a flexible replication and c

I'm using both Solr and Elastic right now (on different projects) - second on those items above. One other plus for Solr is it has a flexible replication and consistency model, out of the box - much better fit for large clusters and multi data center deployments (or multi region high availability AWS deploys). Elastic lacks in replication area (although something appears to be coming soon, via again their paid plugins).