StackSays
Menu
Decision toolsCompareCategoriesPricing dataMethodologyBuild my stack

Authentication · decision tool

What Firebase Auth really costs at your usage

Firebase Auth priced at YOUR usage from verified pricing pages — 50,000 MAU at no charge. See the free-tier ceiling, the per-unit overage, and exactly when it starts costing real money.

Prices verified 2026-07-15 against official pricing pages · fit weights are our estimates (see methodology) · share the URL to share your configuration

Your situation

The verdict updates as you move these.

Nothing qualifies under these constraints — every option failed a hard requirement. Relax one toggle.
Firebase Authruled out: Your usage exceeds every published plan — enterprise/contact-sales territory

Comparing 1 tools head-to-head. Open the full field (7 options) →

The decision, in plain words

Nothing qualifies under these constraints — every option failed a hard requirement (see the ruled-out reasons above). Relax the least important toggle and the field reopens.

Generated from the calculation above — every number traces to the sourced data; nothing here is written by an AI making things up.

At a glance

ToolFree tierPaid entryVerified
Firebase Auth50,000 MAU at no charge—2026-07-15
Where did you land?anonymous, one click

Data sources

ToolSourceVerified
Firebase AuthFirebase pricing page2026-07-15

A monitor re-checks these pages for changes; when a vendor moves a price, the date updates and every verdict recomputes.

Keep deciding

Compare head-to-head

Clerk vs Better Auth — pay for polish or own your users? →Clerk vs Auth0 — startup DX or enterprise checklist? →Clerk vs Supabase Auth — polish vs the cheapest managed seat →Supabase Auth vs Better Auth — for your app, not in general →Kinde vs Auth0 — for your app, not in general →Clerk vs WorkOS — consumer auth or enterprise SSO? →

Alternatives

Auth0 alternatives — ranked for your stack →Clerk alternatives — ranked for your stack →WorkOS alternatives — ranked for your stack →Supabase Auth alternatives — ranked for your stack →Better Auth alternatives — ranked for your stack →Firebase Auth alternatives — ranked for your stack →

Migration paths

Migrate from Auth0 to Better Auth — worth it, in months →Migrate off Auth0 — worth it, in months →Migrate off Clerk — worth it, in months →Migrate off Better Auth — worth it, in months →Migrate off Supabase Auth — worth it, in months →Migrate off Firebase Auth — worth it, in months →

Related decisions

What Clerk really costs at your usage →What Better Auth really costs at your usage →What Auth0 really costs at your usage →What Supabase Auth really costs at your usage →What auth really costs at your scale →What Kinde really costs at your usage →
← All Which auth provider should I use?Authentication & Security channel →