PostgreSQL
PostgreSQL is a powerful open-source relational database.
MySQL
MySQL is a widely used open-source relational database.
SQLite
SQLite is a small relational database stored in a single file.
MongoDB
MongoDB is a document database that stores data as flexible JSON-like documents.
Redis
Redis is an in-memory data store commonly used for caching, queues, sessions, rate limits, and fast counters.
Vector Databases
Vector databases store embeddings so applications can search by semantic similarity.