Supabase is a very good backend: real Postgres, an auth system, storage, realtime, edge functions, and an API generated from your schema. It hands you power and expects you to know what to do with it — the schema, the row level security policies, and the entire frontend are yours to write. 54 goes the other way: you describe what the site does, and the data behind it appears already wired.
| Supabase | 54 | |
|---|---|---|
| What it gives you | Postgres, Auth, Storage, Realtime, Edge Functions and a generated API | A published site with its data, its form, its admin and its logins already connected |
| The frontend | Yours to build and host somewhere else | Built and hosted here, from the same description |
| Schema and permissions | You design tables and write Row Level Security policies | Collections are created from the prompt; the owner sees the admin, the public sees the form |
| SQL | Full Postgres — a real advantage if you want it | You never write it. That is the trade: less raw power, no learning curve |
| Logins | Complete: email, password, OAuth providers, magic links | Email code login for the people who use your site |
| Hosting and domain | Not included — that is another provider | Included, with SSL and your own domain |
| Who it is for | Developers who want a real database and full control | People who want the thing working, and developers building something small fast |
Written from each product's public documentation. Products change: check theirs before you decide. No prices here for the same reason.
For "my site needs to save data and have logins", yes. For "I need Postgres, migrations and row level security under my control", Supabase is the right answer and it is a better one.
No. You describe what the site should store and the collections are created for you, along with the form that writes to them and the screen where you read them.
Yes. It is visible in the admin and downloadable. Data you cannot get out is not really yours.
Everything that comes from having real Postgres: complex queries, joins, indexes, migrations, triggers, realtime subscriptions, and fine-grained row level security. 54 deliberately does not expose that surface.
It builds and hosts the actual site, publishes it on your domain, and does SEO and growth work on it afterwards. Supabase is the backend; the rest is on you.
People who use your site get a code by email and are in. No password to forget and nothing to store for you.
Yes. Every site has its own collections and only its owner reaches the admin.
You can call any HTTP API from your site, including Supabase's. Public config goes in site variables — never put a service key in a page, on any platform.
Postgres under your control scales further and in more directions. If you are already thinking about read replicas and connection pooling, that question has answered itself.
Yes. Download your files and your data and rebuild the backend when the project genuinely needs it. Most projects find out they never do.