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Detox vs Firebase Test Lab

Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.

DetoxMobile Testing
Firebase Test LabMobile Testing

Entry price

Free and open source

Open source

From $1 per virtual device hour (physical devices are $5/hour)

Free tier

What drives the bill

The metric that actually scales your invoice.

Free and open source. You pay in engineering time and CI minutes.

Pay-as-you-go on the Blaze plan, billed to the nearest minute. Physical devices cost five times virtual ones, which is the number that actually shapes a bill. Android Device Streaming is separate: 30 free minutes per project per month, then $0.15 a minute.

Free tier

Everything, self-hosted

Spark plan: 10 virtual-device tests a day (up to 60 free minutes) and 5 physical-device tests a day (up to 30 free minutes).

Open source

MIT

Self-hostable

No-code authoring

Languages

JavaScriptTypeScript
KotlinJavaSwiftJavaScript

Platforms

iOSAndroid
AndroidiOS

Fits teams

StartupScale-up / mid-marketEnterprise
Solo / side projectStartupScale-up / mid-marketEnterprise

Adoption

Widely used

Wix · since 2017

Widely used

Google · since 2016

Strengths

  • Automatic synchronisation with the RN bridge eliminates most timing flake.
  • Same JavaScript and Jest tooling the app team already uses.
  • Fast execution because there is no external driver round trip.
  • Very cheap per device hour compared with commercial device clouds.
  • Robo Test finds crashes with zero test-writing effort.
  • Tight integration with Android tooling and Firebase Crashlytics.

Limitations

  • React Native only — useless for native or Flutter apps.
  • Requires building a special test binary, which complicates the pipeline.
  • Grey-box coupling means an RN upgrade can break your test setup.
  • Device selection is far narrower than a dedicated device cloud.
  • iOS support is meaningfully thinner than Android.
  • No interactive manual testing session.

Best for

React Native teams that want low-flake E2E tests in their existing toolchain.

Android-first teams that want real-device coverage at the lowest cost.

Full review
Full review

All of these integrate with: GitHub Actions.

Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.