Supabase vs Firebase

Supabase vs Firebase

Neither is better for everyone. Supabase suits teams that want a Postgres database queried directly from client code and are willing to write and review RLS policies. Firebase suits teams already building on Google Cloud who accept usage-based billing.

Supabase vs Firebase at a glance

This page compares Supabase and Firebase using only what the sources below say about each. Where one is the better pick for a situation, we say which and why.

We read each source on 2026-11-05. Prices and limits change often, so confirm on the vendor's own page before you buy. A figure marked "one source only" was not matched by a second publisher.

When to pick each one

Pick Supabase if it matches your situation

Choose Supabase over Firebase for teams that want a Postgres database queried directly from client code and are willing to write and review RLS policies.

What the sources say about Supabase:

• The fix given for that lint is to run 'alter table ... enable row level security' and then add policies defining who may access rows.^[4]
• Once RLS is enabled with no policies, no data is accessible through the API to the anon role until policies are added.^[5]
• Supabase sends daily emails about exposed tables that lack RLS and provides a Security Advisor in the dashboard.^[6]
• The hardening guide suggests an event trigger that enables RLS automatically on new tables, and describes options such as disabling the Data API or exposing a custom schema instead of public.^[6]

Pick Firebase if it matches your situation

Choose Firebase over Supabase for teams already building on Google Cloud who accept usage-based billing.

What the sources say about Firebase:

• Firebase offers two pricing plans: the no-cost Spark plan and the pay-as-you-go Blaze plan.^[2]

Limits and things to check

Supabase

• The database linter rule 0013 (RLS disabled in public) is rated ERROR and states that without RLS on a public table, anyone with the project URL can create, read, update and delete rows in it.^[4] One source only.
• Any table created in the public schema is accessible through the Supabase Data API, and the Securing your API guide recommends enabling RLS on tables, views and functions there.^[1]
• Tables created in the dashboard Table Editor have RLS enabled by default; tables created through raw SQL or the SQL Editor need RLS enabled manually.^[5]
• The service_role key has the BYPASSRLS attribute, so RLS policies never apply to it.^[7]
• A Free-plan Supabase project is paused after one week of inactivity, per third-party summaries.^[8]

Firebase

• Paid Google Cloud products such as Pub/Sub, Cloud Run, or BigQuery streaming for Analytics are not available to projects on the Spark plan.^[2]
• Firestore free quota listed by one third-party guide: 50,000 reads, 20,000 writes and 20,000 deletes per day, and 1 GiB stored data.^[9] One source only.
• The same guide lists overage at $0.03 per 100,000 reads and $0.09 per 100,000 writes and notes rates vary by region.^[9] One source only.

Pricing as reported

Supabase

Pricing as reported for Supabase:

• Free: $0 ^[8] One source only, so confirm it on the vendor page.
• Pro: $25 per month ^[3]

Plan limits are longer than fit here and some sources disagree on them, so read the limits on the vendor pricing page.

Firebase

Pricing as reported for Firebase:

• Spark: $0 (No payment method required for most features; a product that exceeds its quota is cut off rather than billed, per third-party summary) ^[2]
• Blaze: Pay as you go (Keeps the same free quotas and bills for usage above them; unlocks paid Google Cloud products) ^[2]

Where Continuum fits

We make Continuum Supabase Security Review. Weigh what we say here with that in mind. The tools above are the better choice when you want software you run yourself; ours is the better choice when you want a person to do or read the work.

Continuum Supabase Security Review (ours)

A human review of a Supabase app covering row level security policies, key exposure, storage rules, auth config and service-role usage.^[10]

What our own page says:

• It returns ranked findings with corrected SQL and a proof for each, in 48 hours.^[10]

Limits and things to check:

• It is a manual review of one app, not a continuous monitor.^[10]

Pricing as reported for Continuum Supabase Security Review:

• Supabase Security Review: Quoted on the page (48 hour turnaround) ^[10]

Suits a team running on Supabase that wants a person to read its policies and keys before launch.

Details on Continuum Supabase Security Review.

Running on Supabase?

Straight answers