key-value-store

For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

A flexible distributed key-value database that is optimized for caching and other realtime workloads.

Open-source, low-latency key/value engine built on Valkey with query subscriptions and hierarchical storage tiers.

Fast persistent recoverable log and key-value store + cache, in C# and C++.

learn database internals by building a storage engine in Rust

✔️ Secure, simple key-value storage for Android

Skytable is a modern scalable NoSQL database with BlueQL, designed for performance, scalability and flexibility. Skytable gives you spaces, models, data types, complex collections and more to build powerful experiences

A simple, fast and versatile Datalog database

Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.

RAMen is a fast in-memory data store like Redis, but built for AI: drop-in Redis protocol, native vector search, semantic caching, and a built-in MCP server for agents. Single Go binary, BSD-3.