A distributed KV-store plus a relational layer makes it a competitor to NewSQL databases like TiDB, which is also based on Facebook's RocksDB.
It doesn't look like it's very actively developed: https://github.com/topling/toplingdb/pulse/monthly
To the OP who's developing it: I suggest polishing your README. Provide a simple installation tutorial, maybe a trial offering like tidbcloud.com, and comparative benchmark results, since you advertise your performance.