undb

undb is an open source no-code database that doubles as a Backend as a Service (BaaS). Built on SQLite, it ships a UI for table management and follows a private, local-first approach for managing your own data.

A built-in playground mode lets you try it without any setup. Formula fields work like Excel and Airtable, and an OpenAPI RESTful API exposes the data for type-safe integrations. undb packages into a single binary with Bun or runs as a Docker service.

Deployment scales progressively, from a single local file to full cloud stacks, with a one-click Render deploy and a hosted option at app.undb.io. As an Airtable alternative, it keeps data on infrastructure you control.