Firebase Test Lab vs Detox

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

Free and open source

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

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).

Everything, self-hosted

Widely used

Google · since 2016

Widely used

Wix · since 2017

• 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.

• 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.

• Device selection is far narrower than a dedicated device cloud.
• iOS support is meaningfully thinner than Android.
• No interactive manual testing session.

• 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.

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

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