DuckDB is an analytical in-process SQL database management system

Simple and fast JSON database

libSQL is a fork of SQLite that is both Open Source, and Open Contributions.

A transactional, relational-graph-vector database that uses Datalog for query. The hippocampus for AI!

chDB is an in-process OLAP SQL Engine 🚀 powered by ClickHouse

An educational OLAP database system.

Modern embedded SQL database

A cloud native embedded storage engine built on object storage.

Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.

A simple, fast and versatile Datalog database

Limbo is a work-in-progress, in-process OLTP database management system, compatible with SQLite.

PoloDB is an embedded document database.

NoSQL embedded document store for Java

Lightning Memory Database (LMDB) for Java: a low latency, transactional, sorted, embedded, key-value store

A portable embedded database using Arrow.

A lightweight document-oriented NoSQL database written in pure Golang.

🗻 LSM-based embeddable key-value storage engine written in safe Rust

A fast, log structured key-value store.

Drop-in embedded database in Rust

A library for creating isolated embedded databases for Spring-powered integration tests.