No. 16 of 29 ·Test Flakiness Management Software

Flake

Windows · Mac · Linux · Self-hosted

Freedom report

Two barsScore 5.6

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Flake is ranked #16 of 29 in test flakiness management software on Freedom251. 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 Freedom251

Best Test Flakiness Management Software in 2026#16 of 29

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Sources

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