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Mobile Development · head to head

EAS Build vs Firebase

EAS Build logo

EAS Build

Mobile Development

Hosted iOS and Android build service for React Native, with signing credentials managed for you

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: EAS Build iOS builds run on macOS workers charged at a much higher rate than Linux, so the invoice is dominated by the platform you have least ability to move off.; Firebase spark plan limited to 1 GiB storage, 50,000 daily reads, 20,000 daily writes
  • They diverge on capability: EAS Build covers Hosted macOS and Linux workers, Firebase covers Real-time Database.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which EAS Build and Firebase actually diverge.

Attributes where EAS Build and Firebase differ
AttributeEAS BuildFirebase
Pricing modelPer month plus build usagefreemium
PlatformsiOS, AndroidiOS, Android, Web, Flutter, C++, Unity
FoundedUnknown1998

Identical on both: starting price (Free), 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 EAS Build

  • Hosted macOS and Linux workers
  • Managed signing credentials
  • Bare React Native support
  • EAS Submit
  • Internal distribution
  • Build profiles

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.

EAS Build

  • A React Native team with no macOS build machine that needs signed iOS buildsnot Firebase
  • Removing signing credentials from individual laptops and putting them under an auditable servicenot Firebase
  • Shipping JavaScript only fixes through EAS Update without waiting on store reviewnot Firebase
  • Distributing internal test builds by link to non technical reviewersnot Firebase

Firebase

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

Where each one falls short

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

EAS Build

  • iOS builds run on macOS workers charged at a much higher rate than Linux, so the invoice is dominated by the platform you have least ability to move off.
  • Lower tiers queue behind higher paying customers, which is invisible until a hotfix build waits in a queue while an incident is running.
  • It is specific to React Native and Expo, so a company with a native Swift or Kotlin codebase alongside gets no benefit and needs a second build system anyway.
  • Deep use of managed credentials and over the air updates makes leaving harder than swapping a continuous integration provider, because the release process itself has been built around the service.
  • Build failures happen on infrastructure you cannot inspect, and reproducing an environment specific failure locally is harder than with a self hosted runner you can log into.

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

EAS Build

Free
  • Free$undefined/month
    • Limited monthly builds that queue behind paying customers
    • Sufficient for evaluation and hobby projects, not for a release cadence
  • Paid tiers$undefined/month
    • Monthly subscription buying build concurrency and included minutes, with overage per minute above them
    • macOS minutes cost several times Linux minutes, so iOS pipelines dominate the bill

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 EAS Build if

  • You need hosted macos and linux workers.
  • You want to start without paying.
  • You work on iOS, Android.
  • You also want managed signing credentials.
EAS Build 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 EAS Build or Firebase better?
Neither clearly leads. EAS Build 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, EAS Build or Firebase?
EAS Build starts at Free and Firebase at Free.
Does EAS Build or Firebase run on more platforms?
EAS Build runs on iOS, Android. Firebase runs on iOS, Android, Web, Flutter, C++, Unity.
Can I use EAS Build for free?
Both have a free tier, so you can try either at no cost before committing.
What is EAS Build best used for?
EAS Build is most often used for a react native team with no macos build machine that needs signed ios builds, removing signing credentials from individual laptops and putting them under an auditable service, shipping javascript only fixes through eas update without waiting on store review, distributing internal test builds by link to non technical reviewers. Of those, a react native team with no macos build machine that needs signed ios builds and removing signing credentials from individual laptops and putting them under an auditable service are not what Firebase is typically brought in for.
What can EAS Build do that Firebase cannot?
EAS Build covers Hosted macOS and Linux workers, Managed signing credentials, Bare React Native support, EAS Submit. Firebase covers Real-time Database, REST API, Authentication, Google Cloud.

Answered from the vendors’ own pages

EAS Build: Does it work without the Expo managed workflow?

Yes. Bare React Native projects build fine, which is a common misconception that costs teams an unnecessary evaluation.

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
EAS Build: Why not just use GitHub Actions macOS runners?

You can, and it is often cheaper. You then own credential management and the Xcode version treadmill, which is the work EAS is actually selling.

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
EAS Build: Can JavaScript updates skip App Store review?

Yes through EAS Update, within Apple's rules about not changing the app's purpose. Native changes still require a store submission.

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
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