Utgivelser inkluderer 0.6, sluppet 12. april 2010, added support for integrated caching, and Apache Hadoop MapReduce 0.7, sluppet 8. januar 2011, added secondary indexes and online schema changes 0.8, sluppet 2. juni 2011, added the Cassandra Query Language (CQL), self-tuning memtables, and support for zero-downtime upgrades 1.0, sluppet 17. oktober 2011, added integrated compression, leveled compaction, and improved read-performance 1.1, sluppet 23. april 2012, added self-tuning caches, row-level isolation, and support for mixed ssd/spinning disk deployments 1.2, sluppet 2. januar 2013, added clustering across virtual nodes, inter-node communication, atomic batches, and request tracing 2.0, sluppet 4. september 2013, added lightweight transactions (based on the Paxos consensus protocol), triggers, improved compactions 2.0.4, sluppet 30. desember 2013, added allowing specifying datacenters to participate in a repair, client encryption support to sstableloader, allow removing snapshots of no-longer-existing CFs 2.1.0 sluppet 10. september 2014 2.1.6 sluppet 8. juni 2015 2.1.7 sluppet 22. juni 2015 2.2.0 sluppet 20. juli 2015 2.2.2 sluppet 5. oktober 2015 3.0 sluppet og senere slipp hver måned ved hjelp av en tick-tock-lik utgivelsesmodell, med like tall i utgivelser som både har nye egenskaper og feilrettinger, og odde tall med kun feilfiksinger.