Vanna

Vanna is a framework for letting people query a database in ordinary language: it generates the SQL, runs it, and returns an answer, and the current site presents version 2.0 as an SQL agent that is open source, works across several databases, holds a conversation over several turns and enforces access control. Providers offered for the language model include Anthropic, OpenAI, Gemini and a local option, and the database list covers the common relational engines as well as analytics warehouses; installing it is a single package command. The vendor separately sells a hosted tier and an enterprise tier, and describes optional hosted features such as access control, observability, agent memory, secure file storage, audit logs and data retention.

There is a discrepancy worth knowing before you choose it. The project's original repository carries the highest profile in this category — the vendor's own documentation still cites more than twenty thousand stars — and that repository is archived, with its last push in February 2026. A separate migration guide for moving off the older version is published alongside the new one, and the vendor's own explanation of the rewrite says the original was built for a single user and one model generation, and that multi-user isolation and production plumbing had to be built from scratch by every customer. So version 2.0 suits a team that needs a query agent with user identity and permissions designed in from the start. It suits less well anyone who wants a small library that bolts onto an existing analytics stack, and it suits less well anyone reading a tutorial written against the archived version.

Not verified: no database was connected and no query was generated, so the accuracy of the SQL and the permission behaviour were not tested. The star count, the vendor's account of what enterprise customers asked for, and the feature lists above come from the vendor's own site and documentation; the pricing page read on 2026-10-12 lists Explorer at $50 a month and Team at $500 a month, with Enterprise priced custom, so those tiers are known; the linked enterprise page returns a 404 rather than a readable page. The archived repository was read only through the hosting service's interface, which reported the MIT licence and about 23,821 stars; the newer repository the site points to returned nothing when queried, so where version 2.0's source lives was not established.