TiDB

How to Decide

TiDB is a cloud‑native, MySQL‑compatible distributed SQL database that developers and DevOps teams use for massive scalability. The alternatives split into a few clear camps: MySQL is chosen for its ubiquitous hosting support and mature ecosystem; SurrealDB leans into NoSQL flexibility with a unified document‑graph‑key‑value model and built‑in real‑time WebSocket subscriptions; Loki focuses on low‑cost log storage by indexing only labels and integrating tightly with Grafana and Prometheus; PostgreSQL is favored for its advanced SQL features, extensibility via extensions, and strong JSONB support.

When comparing these options, the key factors that actually differentiate them are: 1) Data model and query language compatibility – TiDB and PostgreSQL offer full relational SQL, MySQL is classic relational, while SurrealDB provides a hybrid NoSQL‑SQL approach and Loki is a log‑oriented store; 2) Scaling architecture – TiDB and SurrealDB provide automatic horizontal sharding, Loki scales via label‑based indexing, and MySQL/PostgreSQL rely on traditional replication or external sharding solutions; 3) Ecosystem and tooling – MySQL and PostgreSQL have the broadest tooling and GUI ecosystems, TiDB adds Prometheus metrics and Kubernetes operator, SurrealDB offers language‑specific SDKs and real‑time subscriptions, and Loki is tightly coupled with Grafana for visualization; 4) Operational complexity and deployment model – TiDB and SurrealDB require careful cluster configuration for distributed workloads, Loki’s label design adds a learning curve, whereas MySQL and PostgreSQL are simpler to self‑host but may need extra tooling for large‑scale sharding.