DiceDB

What DiceDB is

DiceDB is a free, open-source data structure server designed for Redis-compatible clients, SDKs, commands, tools, and workflows. It supports strings, hashes, lists, sets, sorted sets, and HyperLogLog, and is listed for Linux, macOS, and self-hosted use; its documentation also names OpenBSD, NetBSD, and FreeBSD. The OBSERVE command returns the current result of a read command and sends further results when observed keys change. For disk tiering, the Spill module places evicted keys in RocksDB and restores them when accessed, preserving TTLs during that process. The official Docker image starts with Spill enabled and sets a default 250MB memory limit for that module. Docker instructions mount a local data directory to retain data across container restarts. This deployment detail is worth distinguishing from the listed data-persistence field, which says no. DiceDB uses the BSD-3 Clause License. Its listed plan is free at no cost, and no free trial is offered.