KeyDB

KeyDB is a high performance fork of Redis focused on multithreading, memory efficiency, and high throughput. It keeps full compatibility with the Redis protocol, modules, and scripts, including atomicity guarantees for scripts and transactions, so existing Redis deployments can use it as a drop-in replacement.

KeyDB adds Active Replication, FLASH Storage, and Subkey Expires. Its MVCC architecture lets KEYS and SCAN run without blocking the database and degrading performance. Active Replication supports hot-spare failover, distributing writes over replicas, and TCP based load balancing and failover.

KeyDB is maintained by the KeyDB team as part of Snap Inc. and is used by Snap as part of its caching infrastructure. It is fully open sourced under BSD-3, with no separate commercial product and no paid support options. KeyDB can be compiled and is tested for use on Linux, and a Docker image is available.