Ranked in these QuestionsQuestion Ranking
Pro You can add expiry and notifications to Elasticsearch and Cassandra records in an unified manner
Pro Cheapest option at great quality
While it costs 1000's of dollars per month at other places for a cluster of 3, it runs around $100 @amidb, if you decide it to host it yourself. This is including hosts/bandwidth/transfer and SSD. You will save on other colud nosql databases as cassandra is included. You will also experience savings on cloud file storage costs, and much more....
Pro Offers caching of resultsets and other binaries
You can use REST apis to cache your query results and binaries. This combined with a local cache and cdn will make your applications super fast!
Pro Offers file uploads, staging and variants
You can associate files to elasticsearch or cassandra rows.