Marathon

Judgement

What it is

Developer tool

What it does

Runs Android and iOS UI tests across pools of devices with sharding, batching, sorting by expected duration and automatic retries for flaky tests.

Adopt it when

Your mobile UI test suite is slow or flaky across many devices and you want to control the trade-off between speed, stability and cost.

Watch out

It is GPL-2.0 and the company behind it sells a hosted cloud version, so the open-source tool may trail it.

Ready for

Usable

Runs as

Command line

Built with

Kotlin

How established

Established: started 8 years ago, latest release 0.10.5.

What the license allows

Use inside your business is unrestricted, but anything you distribute that includes it must be released under the same license.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Marathon → Kotlin → JDK → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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