Flake

6.6easy start · #24 of 30
in Test Flakiness Management Software

Free to practise onnot on record
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, self-hosted, Windows.

Flake is ranked #24 of 30 in test flakiness management software on The Geeks Club. It runs on Linux, macOS, Self-hosted, Windows.

Compared on test flakiness management software

Free plan: Yes
Flake detection: Yes
Quarantine workflow: No
Failure clustering: Yes
Rerun policies: Yes
Supported frameworks: pytest, Jest, Vitest

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The record

Purpose: Flake detects, diagnoses, and replays flaky tests by repeatedly running test suites under controlled variations.
Supported test runners: Flake supports pytest, Jest, and Vitest.
Detection: It computes failure rates and normalizes output into stable signatures to group failures into incidents.
Diagnosis: For ordering failures, Flake uses delta debugging to reduce the preceding test sequence and verify a minimized reproduction.
Replay: Each incident stores a run specification, and `flake replay <id>` rebuilds the recorded invocation.
Integrations: Flake is available as a GitHub Action that can write a Markdown job summary, annotate flaky test files, and upload JSON, Markdown, or SARIF reports as an artifact.
Privacy: The README says Flake does not upload source or test output, and stores its state in a local SQLite database in the OS application-data directory.
Secret handling: Flake redacts likely-secret values before storing them and rejects secret-looking variable names in the environment allowlist.
Limitations: With Jest, Flake cannot force an exact cross-file test order because Jest's own sequencer chooses it.
Dependencies: Flake uses test runners and plugins already installed in the project and does not install dependencies or plugins.
Availability: The README describes Flake as a cross-platform Go CLI and provides a `go install` command and released binaries for OS and architecture combinations.
License: The repository lists the MIT license.
Supported runners: It supports pytest, Jest, and Vitest test suites.
Detection and replay: Flake computes failure rates, minimizes reproduction conditions, reports suspected causes from observed evidence, and saves replay commands.

Where it ranks on The Geeks Club

Best Test Flakiness Management Software in 2026#24 of 30

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Sources

github.com/kingsleychenlab/Flake· checked 30 Sept 2026