Softwr

Mobile Development · head to head

Expo vs Firebase

Expo logo

Expo

Mobile Development

React Native framework and cloud platform for building and shipping apps

From
Free
Rated
-
Full reviewWebsite
Firebase logo

Firebase

Mobile Development

Google's platform for building web and mobile applications with cloud backend

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Expo free tier build counts and MAU support are low, pushing active projects to paid plans quickly.; Firebase spark plan limited to 1 GiB storage, 50,000 daily reads, 20,000 daily writes
  • They diverge on capability: Expo covers Expo SDK, Firebase covers Real-time Database.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Expo and Firebase actually diverge.

Attributes where Expo and Firebase differ
AttributeExpoFirebase
Platformsweb, ios, android, apiiOS, Android, Web, Flutter, C++, Unity
FoundedUnknown1998

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), user rating (Not yet rated), category (Mobile Development).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Expo

  • Expo SDK
  • EAS Build
  • EAS Submit
  • EAS Update
  • Expo Router
  • EAS Hosting
  • EAS Insights

Only in Firebase

  • Real-time Database
  • REST API
  • Authentication
  • Google Cloud
  • Cloud functions
  • Cloud Storage
  • Web support
  • Mobile support

What people use each for

The jobs each tool is most often brought in to do.

Expo

  • Building cross-platform apps with React Native without native toolingnot Firebase
  • Running cloud builds and store submissions via EASnot Firebase
  • Shipping over-the-air updates to bypass app store reviewnot Firebase
  • Adding file-based navigation with Expo Routernot Firebase
  • Hosting companion web apps and APIsnot Firebase

Firebase

  • Mobile app backend developmentnot Expo
  • Real-time data synchronisationnot Expo
  • Web application backendnot Expo
  • Cross-platform app developmentnot Expo

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Expo

  • Free tier build counts and MAU support are low, pushing active projects to paid plans quickly.
  • Usage-based overage charges for builds, CI/CD minutes, and MAUs can make costs less predictable.
  • Concurrent build limits on lower tiers slow down teams with frequent releases.
  • Some native functionality still requires ejecting to bare workflow or writing custom native modules.

Firebase

  • Spark plan limited to 1 GiB storage, 50,000 daily reads, 20,000 daily writes
  • Spark plan restricts to 100 concurrent database connections
  • Spark plan limits Firebase Studio to 3 workspaces maximum
  • Document size capped at 1 MiB per document
  • Transaction time limited to 270 seconds with 60-second idle expiration
  • Maximum 100 databases per project (increase requires support request)

Pricing, plan by plan

Expo

Free
  • FreeFree
    • 15 Android and 15 iOS builds
    • Low-priority build queue
    • 60 minutes of CI/CD workflows
  • Starter$19/month
    • $45 build credit included
    • High-priority queue and large workers
    • 3,000 MAUs for updates
  • Production$199/month
    • $225 build credit included
    • 2 concurrent builds
    • 50,000 MAU support
  • Enterprise$undefined/month
    • $1,000 build credit included
    • 5 concurrent builds
    • 1M+ MAU support

Firebase

Free
  • SparkFree
    • No-cost usage with daily-refreshing quotas
    • Cloud Firestore: up to 1 GB storage, 20K writes/day, 50K reads/day
    • Cloud Functions: up to 2M invocations/month, 400K GB-seconds/month
  • Blaze$null/variable
    • Pay-as-you-go usage beyond free tier
    • Cloud Firestore: $5/GB after 1 GB, writes beyond 20K/day at overage rates
    • Cloud Functions: $0.40 per million invocations beyond 2M/month, $0.12/GB for outbound networking beyond 5 GB/month

Which should you pick?

Choose Expo if

  • You need expo sdk.
  • You want to start without paying.
  • You work on web, ios, android, api.
  • You also want eas build.
Expo review

Choose Firebase if

  • You need real-time database.
  • You want to start without paying.
  • You work on iOS, Android, Web, Flutter, C++, Unity.
  • You also want rest api.
Firebase review

Questions people ask

Is Expo or Firebase better?
Neither clearly leads. Expo starts at Free and Firebase at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Expo or Firebase?
Expo starts at Free and Firebase at Free.
Does Expo or Firebase run on more platforms?
Expo runs on web, ios, android, api. Firebase runs on iOS, Android, Web, Flutter, C++, Unity.
Can I use Expo for free?
Both have a free tier, so you can try either at no cost before committing.
What is Expo best used for?
Expo is most often used for building cross-platform apps with react native without native tooling, running cloud builds and store submissions via eas, shipping over-the-air updates to bypass app store review, adding file-based navigation with expo router. Of those, building cross-platform apps with react native without native tooling and running cloud builds and store submissions via eas are not what Firebase is typically brought in for.
What can Expo do that Firebase cannot?
Expo covers Expo SDK, EAS Build, EAS Submit, EAS Update. Firebase covers Real-time Database, REST API, Authentication, Google Cloud.

Answered from the vendors’ own pages

Expo: What does Expo cost?

Expo offers a free plan, a Starter plan at $19/month with $45 build credit, a Production plan at $199/month with $225 build credit, and custom Enterprise pricing.

Source
Firebase: What are Firebase's free tier limits?

Firebase Spark plan includes no-cost daily-refreshing quotas: Cloud Firestore up to 1 GB storage with 20K writes and 50K reads per day; Cloud Functions up to 2M invocations monthly; Cloud Storage 5 GB-months with 100 GB downloads monthly; Hosting 10 GB storage and 360 MB daily data transfer; Realtime Database up to 1 GB storage. No payment method required.

Source
Expo: Is there a free plan, and what are its limits?

The Free plan includes 15 Android and 15 iOS builds, low-priority build queue access, 60 minutes of CI/CD workflows, and support for 1,000 monthly active users on updates.

Source
Firebase: How much does Firebase Blaze plan cost?

Firebase Blaze is pay-as-you-go beyond free tier limits. Pricing includes Cloud Firestore storage at $5/GB after 1 GB; Cloud Functions $0.40 per million invocations beyond 2M monthly; Cloud Storage $0.026/GB beyond 5 GB; Hosting $0.15/GB beyond 360 MB daily. New eligible customers receive $300 free credit.

Source
Expo: How is usage metered on paid plans?

Beyond included build credit, Expo charges per build by platform and worker size, per CI/CD workflow minute, per million Observe events, and graduated per-MAU overage rates for updates.

Source
Firebase: Which Firebase services are always free regardless of tier?

A/B Testing, Analytics, App Check, Cloud Messaging, and Crashlytics are offered at no cost on both Spark and Blaze plans, with no usage limits stated.

Source
Share

Related pages

More on Expo

More on Firebase

Keep looking

Other head to heads