Railway is the cheapest verified alternative to Supabase: Railway Hobby costs $60 a year against the $300 Supabase Pro costs, so $240 stays in your account. 5 options below, ranked by yearly cost, each with its own verified cancellation guide.
Supabase Supabase Pro Ranked by yearly cost, cheapest first. Each one links to our own verified guide, so you can see how hard it is to leave later.
Railway Railway Hobby plan $5 / month Why this one - Run Postgres alongside your apps
Render Render Hobby plan $25 / month Why this one - Managed Postgres from $6
Appwrite Cloud Appwrite Cloud Pro plan $25 / month 
Convex Convex Professional plan $25 / developer / month 
Neon Neon Launch plan Usage-based Why this one - Usage-based Postgres
No one pays for a spot here - the cheapest option simply goes first, the Switch button goes straight to the provider, and every card links to our own verified guide.
Every price and cancellation route on this page is checked against the provider's own pricing page, terms and support documentation - then dated, so you can see how fresh it is.