Dragonfly
DragonflyDB is rethinking what an in-memory datastore should look and behave like, with the goal of building something significantly more performant and easier to scale than Redis.
Their goal is to redesign the engine using novel algorithms and data structures, innovating around lockless multithreading, memory structures, caching algorithms, and snapshotting to provide a simple, cost-efficient, and reliable in-memory store that delights the engineering community.