DuckDB is an analytical in-process SQL database management system

A SQL database in Rust: SQLite-compatible, now also speaking Postgres (experimental). The LLVM of databases.

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!

A cloud native embedded storage engine built on object storage.

The AI-Native Search Database. Best for agent storage, it unifies vector, text, structured, and semi-structured data into a single engine. This all-in-one database makes agents smarter, easier to run, and more stable.

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

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

An educational OLAP database system.

Modern embedded SQL database

Tonbo is an embedded database for serverless and edge runtimes.

A simple, fast and versatile Datalog database

Fastfull embedded transactional key-value storage engine ★ Surpasses the legendary LMDB in reliability, capabilities and performance ★ Used in hundreds of open source projects, including Ethereum.

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

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 lightweight document-oriented NoSQL database written in pure Golang.

Drop-in embedded database in Rust