Which is cheaper, Firebase or Supabase?

Both offer free tiers. Firebase provides "Spark" and Supabase offers "Free". Compare the specific limits above to determine which fits your usage.

Is Firebase or Supabase more stable?

Firebase has 2 recorded changes and is rated stable. Supabase has 0 recorded changes and is rated stable.

Can I use Firebase and Supabase together?

While both are in the Databases category, some teams use both for different workloads. Check each vendor's free tier limits to see if they complement your stack.

Compare Firebase and Supabase free tiers side by side. Pricing, limits, change history, and risk assessment for developers.

Firebase vs Supabase

Side-by-side free tier comparison. Catalogue dates here run to 2026-10-03.

43 other databases options →

Verdict

Both Firebase and Supabase offer free tiers. Firebase provides "Spark" while Supabase offers "Free".

A verdict here is not a fixed property of the vendor. A one-off pricing event demotes a vendor while its recorded date falls in the last 180 days and then lapses on its own, with nothing about the vendor having changed; a standing condition — a free tier withdrawn and not restored, a product retired — does not lapse with time. A badge carrying a date states the record it rests on; a badge with no date rests on no record in force.

Firebase profile → Supabase profile →

Firebase

Riskstable

CategoryDatabases

TierSpark

Verified2026-10-03

Last read2026-10-03

Changes2 recorded

Spark plan, no payment method needed: Auth (50K MAU), Firestore (1 GiB stored, 50K reads/day, 20K writes/day, 20K deletes/day), Hosting (10 GB storage, 360 MB/day transfer), and no-cost Analytics, Crashlytics and Cloud Messaging. Cloud Functions and Cloud Storage need the Blaze plan.

If a Spark project exceeds a no-cost quota, that product is shut off for the project (all its apps) for the rest of the calendar month, unless you upgrade to Blaze. (From firebase.google.com/docs/projects/billing/firebase-pricing-plans, read 2026-10-05.)
A Spark account can create a small number of projects, usually about 5-10. (From firebase.google.com/support/faq, read 2026-10-05.)
Linking a Cloud Billing account to a Spark project, including one with $300 Google Cloud free trial credits, automatically upgrades it to the pay-as-you-go Blaze plan. (From firebase.google.com/docs/projects/billing/firebase-pricing-plans, read 2026-10-05.)
On Spark, email-link sign-in is limited to 5 emails a day; sending more needs a billing account (Blaze). (From firebase.google.com/docs/auth/limits, read 2026-10-07.)

Supabase

Riskstable

CategoryDatabases

TierFree

Verified2026-08-17

Last read2026-10-04

Changes0 recorded

Postgres development platform: database, Auth, Storage, Realtime and Edge Functions. The Free plan is $0: unlimited API requests, 50,000 monthly active users, a 500 MB database on a shared CPU with 500 MB RAM, 5 GB egress plus 5 GB cached egress, 1 GB file storage, 500,000 Edge Function invocations, and Realtime with 200 concurrent connections and 2 million messages a month. Free projects are paused after 1 week of inactivity, with a limit of 2 active projects. Pro starts at $25 a month for the first project and includes $10 a month of compute credits, enough for one Micro instance.

Supabase makes daily backups only for Pro, Team and Enterprise projects, so a free project has none, and Supabase recommends exporting it yourself with the CLI's db dump command. (From supabase.com/docs/guides/platform/backups, read 2026-10-05.)
A paused project can be restored from the dashboard for 1 year. After that, only its backup file and Storage objects can be downloaded. (From supabase.com/docs/guides/platform/upgrading, read 2026-10-05.)
Supabase notifies you when you exceed the Free Plan quota. Continued overuse brings restrictions that can include a read-only database, 402 responses to every API request, or paused projects. They lift when the quota refills next billing cycle or on upgrade to Pro. (From supabase.com/docs/guides/platform/billing-faq, read 2026-10-05.)

Pricing Change History

Firebase

deprecated effective 2026-03-19 medium impact

Google announced the sunset of Firebase Studio (formerly Project IDX) on 2026-03-19. New workspaces and signups stopped on 2026-06-22, and Firebase Studio shuts down on 2027-03-22, when remaining data is deleted. Other Firebase products are not affected. Source ↗

reduced effective 2026-02-03 high impact

Cloud Storage for Firebase now requires the pay-as-you-go Blaze plan, in effect from February 3, 2026. Projects on the no-cost Spark plan lose access to all Cloud Storage buckets, including default buckets; console access redirects to an upgrade page and API calls return 402 or 403. Provisioning a new default bucket also requires Blaze. Source ↗

Supabase

No recorded pricing changes for Supabase.

Watch Both Vendors for Pricing Changes

We do not push notifications. Every change we record is readable the moment it lands, and the JSON answer carries an ETag — send it back as If-None-Match and an unchanged answer costs one 304.

curl https://agentdeals.dev/api/changes?vendor=Firebase
curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Firebase
curl https://agentdeals.dev/api/changes?vendor=Supabase
curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Supabase

API docs →

Firebase vs Supabase

Verdict

Firebase

Supabase

Pricing Change History

Firebase

Supabase

Watch Both Vendors for Pricing Changes

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