Wix's business backend behind any frontend you build
Wix Headless lets developers use Wix's business infrastructure (CMS, ecommerce, bookings, members, and payments) through APIs and SDKs while building the frontend in any framework they like. It is a fit for teams who want full control over the front end without building and maintaining their own backend for content, checkout, and user accounts.

Supabase
Open-source Firebase alternative with Postgres, auth, and storage included

Coda
All-in-one doc, database, and app workspace for collaborative teams

Stackby
Spreadsheet-database hybrid with built-in automations and API integrations
Baserow
Open-source no-code database with app builder and workflow automation