Metabase is a BI tool focused on querying, reporting, and visualization, but it’s read-only. Mathesar is closer to Airtable, you get a spreadsheet-like UI, you can view and query data like Metabase, but you can also add and edit data or even modify the data model (if the permissions allow it). Unlike Metabase, Mathesar also lets you create a database from scratch rather than just connecting to an existing one.

Metabase adds an abstraction layer with concepts like questions, segments, and metrics, while Mathesar works directly with Postgres tables, schemas, and permissions. Mathesar is deeply integrated with Postgres, so it supports Postgres-native features like role and privilege based access control, which aren’t possible in products designed for multiple database backends.

I hope that helps!