How to self-host your Airtable alternative
None of the catalog's 3 Airtable alternatives is 100% FOSS (all 3 are Open-Core), so self-hosted is the only intent with its own page for Airtable — there's no separate "open-source" version to show.
Tools that meet this intent
Alternative to Airtable
Smart spreadsheet on top of SQL, an alternative to Airtable.
Alternative to Airtable
No-code database, a direct alternative to Airtable.
Alternative to Retool, Airtable
Low-code builder for internal apps, an alternative to Retool.
Real server requirements
Between 256MB and 1GB of RAM depending on the tool — never a single number.
Range from 256MB (Budibase) to 1GB (NocoDB) of RAM; Baserow and Budibase are the easiest to install (beginner tier). NocoDB is currently the only one of the 3 with a "Verified" state in our Docker deployment audit — see the exact detail on its page.
What you gain and lose versus the SaaS
The Open-Core model means the core (tables, views, basic automations) is free and self-hostable, but advanced features (SSO, certain granular permissions) may still be paid depending on the project — check each one's license on its page before assuming everything is free.