MindsDB Query Engine sits between agents/SQL clients and 200+ live sources. It pushes source-specific work down, supports cross-source queries and views, and presents one SQL-compatible surface over databases, warehouses, SaaS applications, files and vector stores.
Knowledge Bases combine embeddings, optional reranking, vector/BM25 hybrid retrieval and metadata filters; jobs/triggers keep indexes and derived data current. The engine runs through Docker or PyPI and exposes HTTP editor plus MySQL/PostgreSQL wire protocols.
Query Engine remains a standalone, maintained product at mindsdb/engine; MindsHub is a separate hosted agent workspace. Core code is source-available under ELv2 while some integration directories carry MIT terms, so the catalog must not label the whole product OSI-open-source or attach MindsHub cloud pricing to it.
