ClickHouse is the fastest and most resource efficient real-time data warehouse and open-source database

RocksDB/LevelDB inspired key-value database in Go

Doltgres offers all the Git-style log, diff, branch, and merge functionality of Dolt on your Postgres database schema and data

Dragonfly is a drop-in Redis® replacement that is high-performance, low-complexity, and built for scale.

JunoDB is PayPal's home-grown secure, consistent and highly available key-value store providing low, single digit millisecond, latency at any scale

Probably, the fastest in-memory store in the universe!

Redis and Memcached compatible store.

PranaDB is a distributed streaming database, designed from the outset to be horizontally scalable

YDB is an open-source Distributed SQL Database that combines high availability and scalability with strong consistency and ACID transactions

Fauna is a flexible, developer-friendly, transactional database delivered as a secure and scalable cloud API with native GraphQL

MinIO offers high-performance, S3 compatible object storage

Beam is designed to store large graphs that cannot fit on a single server. It's scalable in how much data it can store and the rate of queries it can execute

OPEN-SOURCE GRAPH INSPIRED BY THE GRAPH DATABASE BEHIND FREEBASE AND GOOGLE'S KNOWLEDGE GRAPH.

a system for incrementally processing updates to a large data set

Elliptics network is a fault tolerant distributed key/value storage. With default key generation policy it implements hash table object storage

A Cassandra compatible NoSQL column store, at 1MM transactions/sec per server.

CockroachDB enables developers to build scalable applications that can survive datacenter-scale outages without breaking a sweat. With strong consistency and transactions, CockroachDB frees developers to focus on what matters, instead of engineering solutions to database shortcomings.

Sophia is a modern embeddable key-value database, fast and feature-rich.

more efficient use of I/O, multiple CPU cores and large memory in a single server

Engineered to meet the elastic scalability, consistent high performance, always-on availability, and data mobility requirements of mission critical applications.

EJDB is the C library based on modified version of Tokyo Cabinet. JSON representation of queries and data implemented with API based on C BSON

Crate Data is an open source massively scalable data store.

A consistent distributed data store.

LMDB is an ultra-fast, ultra-compact key-value data store developed by Symas for the OpenLDAP Project.

The Open-Source Database for Ad hoc Analytics