CATA as compared to its competitors like BigchainDB is going on Public blockchain and will be using POC and PoA consensus algorithm. But the most interesting thing which make CATA stand out among all its competitors is the fact that it has the 'Capability of unstructured data processing'.
BigchainDB and CATA both have similarities like both have '
Capability of structured data processing', Cassandra is also competitor but its way behind both CATA and BigchainDB. CATA is still to be launched while other wo are in production.