Cube
Semantic layer and headless BI for building data apps on any database
Overview
Cube (formerly Cube.js) is an open-source semantic layer that sits between your database and any frontend BI or data app. It provides a schema-driven data model, automatic caching with pre-aggregations, multi-tenant access control, and REST/GraphQL/SQL APIs. Deployed as a Node.js service via Docker, it connects to Postgres, BigQuery, Snowflake, DuckDB, and dozens more.
Where it falls short of Retool
- Not an end-user spreadsheet; requires developer effort to define data models in YAML or JavaScript
- No built-in visual grid editor; intended to power custom-built frontends, not replace Airtable directly
- Pre-aggregation setup for large datasets requires careful tuning and database-specific knowledge
We list the gaps honestly so you can decide if the trade-off is worth owning your data.
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