cockroachdb/cockroach

YugabyteDB - the cloud native distributed SQL database for mission-critical applications.

TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.

The lightweight, fault-tolerant database built on SQLite. Designed to keep your data highly available with minimal effort.

OceanBase is the unified distributed database for the AI era — open-source, multi-model, one engine for your most demanding workloads.

Vitess is a database clustering system for horizontal scaling of MySQL.

Distributed transactional key-value database, originally created to complement TiDB

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

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

Distributed PostgreSQL as an extension