Simple to use local JSON database. Use native JavaScript API to query. Written in TypeScript. (supports Node, Electron and the browser)

A fast, offline-first, reactive Database for JavaScript Applications https://rxdb.info/

DuckDB is an in-process SQL OLAP Database Management System

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!

An OLAP database system for educational purpose

Document-oriented, embedded SQL database

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

A simple, fast and versatile Datalog database

Java embedded nosql document store

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

PoloDB is an embedded document database.

An in-process property graph database management system built for query speed and scalability.

A fast, log structured key-value store.

chDB is an embedded OLAP SQL Engine powered by ClickHouse

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

Python bindings for the UnQLite embedded NoSQL database

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

Authenticated multi-version database: sparse binary merkle tree with compact partial-tree proofs

Multiplatform NoSQL database