Caffeine

Redis

redis/redis

Popular

In-memory data store for caching, queues and pub/sub; back to open source (AGPLv3) since Redis 8.

Valkey

valkey-io/valkey

Trending

Linux Foundation, BSD-licensed fork of Redis adopted by AWS, Google Cloud and major Linux distros.

Memcached

memcached/memcached

Simple, battle-tested distributed memory cache for key-value lookups.

Dragonfly

dragonflydb/dragonfly

Rising

Multi-threaded, Redis- and Memcached-compatible in-memory store built for high throughput.

Garnet

microsoft/garnet

Microsoft Research's RESP-compatible cache store in .NET with high throughput and low latency.

KeyDB

Snapchat/KeyDB

Legacy

Multi-threaded Redis fork from Snap; development has slowed and Valkey/Dragonfly are preferred.