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Supabase vs Firebase (Spark plan): which free plan?
Firebase (Spark plan) has fewer strings attached on its free plan (score 100 vs 87). Supabase can still be the better choice for the cases below.
Both checked against their official pricing pages on 1 Nov 2026.
| Type | Postgres BaaS | BaaS + hosting |
|---|---|---|
| Free-tier score | 87 / 100 | 100 / 100 |
| Card to sign up | Not required | Not required |
| Free plan ends | Never | Never |
| Sleeps when idle | Paused after 1 week of inactivity | No |
| Commercial use | Allowed | Allowed |
| Own domain on free | No | Yes |
| Free subdomain | *.supabase.co (API URL) | *.web.app and *.firebaseapp.com |
| Free limits |
|
|
| The catch | Free projects pause after a week without activity. | Cloud Functions, App Hosting and (for new projects) Cloud Storage need the pay-as-you-go Blaze plan. |
| Paid from | $25/mo (Pro) | Usage-based |
| Source | Official pricing for Supabase (opens in a new tab) | Official pricing for Firebase (Spark plan) (opens in a new tab) |
Which one should you pick?
Pick Supabase if…
- your project is: full-stack apps on Postgres
Pick Firebase (Spark plan) if…
- your app must not sleep when idle
- you need your own domain on the free plan
- your project is: apps needing auth and a realtime database
Questions
Which is better for free, Supabase or Firebase (Spark plan)?
Firebase (Spark plan) has fewer strings attached on its free plan (score 100 vs 87). Supabase can still be the better choice for the cases below.
Does Supabase or Firebase (Spark plan) need a credit card?
Supabase: no. Firebase (Spark plan): no.
What is the catch with Supabase and Firebase (Spark plan)?
Supabase: Free projects pause after a week without activity. Firebase (Spark plan): Cloud Functions, App Hosting and (for new projects) Cloud Storage need the pay-as-you-go Blaze plan.