SurrealDB

SurrealDB is a Rust-based multi-model database that brings several data models into one engine: key-value, document, graph, relational, time-series and geospatial data. Search and retrieval options include full-text, vector and hybrid, and it adds real-time and event-driven capabilities, queried through its SQL-like language, SurrealQL.

Because it supports end-user authentication, SurrealDB can also act as a backend-as-a-service, reducing the amount of server-side code an app needs. It ships as a single Rust binary that can run embedded inside an application, in the browser via WebAssembly, at the edge, as a self-hosted single node, or as a distributed cluster in the cloud. Typical workloads include data-intensive systems that need several data types, storage for AI agents, knowledge graphs, live applications such as recommenders and fraud detection, and embedded or edge deployments.

The repository license is listed as 'Other' on GitHub, so confirm the terms before commercial use. SurrealDB also offers cloud-hosted database service, and topics tag it as a serverless, realtime database for the web.