Timescale (now Tiger Data)

PostgreSQL-native database platform optimized for time-series, vector, and event data at petabyte scale, available as cloud-managed service or self-managed enterprise deployment.

Supabase

Supabase offers a managed PostgreSQL backend platform with built-in authentication, file storage, real-time synchronization, serverless functions, and vector database capabilities.

Milvus

Milvus is an open-source vector database for searching and retrieving similar items across billions of vectors, used to power semantic search, recommendation systems, retrieval-augmented generation, and image/video similarity matching.

MariaDB

Open-source relational database management system with commercial support, cloud services, and AI-ready analytics capabilities.

Weaviate

Weaviate provides an open-source vector database and AI platform that enables developers to build applications with semantic search, RAG, and persistent memory for AI agents.

InfluxDB

InfluxDB is an open-source and commercial time series database designed to ingest, store, and analyze high-velocity operational and sensor data in real time.

TiKV

TiKV is an open-source, distributed key-value database that provides ACID transactions, horizontal scalability, and strong consistency for cloud-native applications.

SurrealDB

SurrealDB sells a multi-model database that combines documents, graphs, vectors, time-series, and search in a single engine, and has recently added a dedicated agent memory product called Spectron.

SpiceDB

SpiceDB is an open-source database that stores and evaluates relationships (like ‘user X is an editor of document Y’) to answer authorization questions in real time, enabling fine-grained access control for applications.

Riak

Riak is a distributed NoSQL database designed for high availability and fault tolerance, offering key-value and time-series data models.