Firebase

firebase.google.com

KEEP IT

The value is the network, the data or the infrastructure. Keep paying.

A backend platform with a realtime document database, authentication, functions, hosting and analytics, aimed at getting a mobile application working quickly.

Promptfree, for everyone, and the only version there is

Move to something you can run, and plan the offline story.

STACK
- PocketBase or Supabase, plus a deliberate offline layer in the client

THE ACTUAL DIFFICULTY
- Not the database. The offline cache and conflict resolution the Firebase SDK gives you for free
- Decide your conflict rule explicitly: last write wins, or per-field merge, or reject and ask
- Whatever you choose, the user must be told when their change was overwritten

THE CLIENT
- A local store, a write queue replayed in order on reconnect, and a visible pending state
- Idempotency keys on every queued write, so a replay cannot duplicate

REALTIME
- Both alternatives offer subscriptions; use them for notification, not as the source of truth

COSTS
- Firebase bills per read. A poorly indexed list view is what makes bills explode; check yours before blaming the platform

Include the write queue, the conflict rule and the migration order.

What you lose

Offline persistence with automatic conflict resolution on mobile, which is genuinely hard and is why people stay
Realtime listeners that scale without you operating anything
Crash reporting and analytics wired into the same SDK

If you would rather not build

Appwrite, closest in shape

The escape hatch

open source · no votes, no paid placement

Supabase

Postgres with auth, storage and realtime, self-hostable.

supabase/supabasefree · open source

PocketBase

One binary covering the same job at a much smaller scale.

pocketbase/pocketbasefree · open source

Why this verdict

our own opinion · changed only by a person

30/100

Verdict no at 30. The database is replaceable; the offline SDK is the part that quietly does the most work and takes the longest to rebuild.

History

tracked since 10 Aug 2026 · nothing is ever overwritten

Interest · last 30 days

Nothing recorded yet. This chart fills in once the page has visitors, votes or prompt copies — it will not draw a flat line to look busy.

Questions about Firebase

answered from the record above

Is Firebase free?

No — the plan we track is $25 a month. Pay as you go with a free allowance; a small application typically lands around $25/month, rising with reads and writes.

Can you replace Firebase by building your own?

KEEP IT. The value is the network, the data or the infrastructure. Keep paying. Replacement score 30 out of 100, build time longer than it saves. Read what you lose before you decide.

How much does Firebase cost?

$25 a month on Blaze — $300 a year. Recorded 10 Aug 2026.

What do you lose by replacing Firebase?

Offline persistence with automatic conflict resolution on mobile, which is genuinely hard and is why people stay; Realtime listeners that scale without you operating anything; Crash reporting and analytics wired into the same SDK. If any of those carry weight for you, keep paying.

Is there an open-source alternative to Firebase?

Yes: Supabase, PocketBase. The prompt on this page is for when you want it your way instead.

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