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

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Firebase vs Supabase

Side-by-side free tier comparison. Catalogue dates here run to 2026-08-25.

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180 days and then lapses on its own, with nothing about the vendor having changed; a standing condition — a free tier withdrawn, a product retired — does not lapse with time.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
Verified2026-08-25
Last read2026-09-22
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.

Supabase

Riskstable
CategoryDatabases
TierFree
Verified2026-08-17
Last read2026-09-19
Changes1 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.

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

reduced effective 2026-02-01 medium impact
Project pause policy tightened — inactive projects now pause after 1 week Source ↗

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

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