Marked as helpful by the asker
Rough rule of thumb for a normal CRUD app:
| Users/day | Supabase | Vercel | Total |
|---|---|---|---|
| 50 | free | free | €0 |
| 500 | Pro €25 | Hobby is fine unless commercial → Pro €20 | ~€45 |
| 5,000 | Pro €25 + maybe compute add-on | Pro €20 | €50–100 |
The things that actually cause surprise bills: images served through your own app instead of a CDN, and a cron job that runs every minute. Set a spend cap in Supabase and a usage alert in Vercel today, both take two minutes.