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.

FoundationDB - the open source, distributed, transactional key-value store

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++.

A course of building an LSM-Tree storage engine (database) in a week.

✔️ Secure, simple key-value storage for Android

Distributed, in-memory key/value store and cache. It can be used as an embedded Go library and a language-independent service.

🔩 A relentless key-value store for the browser.

Python disk-backed cache (Django-compatible). Faster than Redis and Memcached. Pure-Python.

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

🗻 Log-structured, embeddable key-value storage engine written in Rust

Apache Pegasus - A horizontally scalable, strongly consistent and high-performance key-value store

A simple, fast and versatile Datalog database

Embedded key-value store for read-heavy workloads written in Go

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

a very simple pure key => value storage system that speaks Redis protocol with Postgres as storage engine and more

A RocksDB compliant high performance scalable embedded key-value store

cachegrand - a modern data ingestion, processing and serving platform built for today's hardware

Fully typed LMDB wrappers with minimum overhead 🐦