Alternative to Supabase
Zipper is a Supabase alternative.
Zipper The Cellar is a Supabase-shaped data plane: sealed SQL, row policies, and branches — plus Crown, Keep, and Site Hosting already in the palace.
- 1. Seals instead of a database URL. No long-lived postgres:// string in Vercel env. A seal binds role, tables, ops, and expiry. Revoke instantly.
- 2. Default-deny engine RLS. Authenticated seals only see rows their predicate allows. Service seals bypass. Tenant SQL never hits the host parser.
- 3. The rest of the backend is named. Auth is The Throne Room. Files are The Archives. Functions are Edge Functions. You do not rebuild the palace around one database product.