TiDB

TiDB, developed by PingCAP, is an open-source, MySQL‑compatible distributed SQL database designed for scalable, strongly consistent OLTP and HTAP workloads. It offers horizontal scaling, ACID transactions, high availability, and online scaling through a cloud‑native architecture that unifies transactional and analytical queries under a single SQL interface. TiDB is used by companies like LinkedIn, Pinterest, and Square, and is available for on‑premises deployment or as managed services with commercial support from PingCAP.