Captain

Overview

Captain is an open-source CLI for engineering teams that want to manage flaky tests and distribute test files across parallel CI jobs. It is a strong fit when the team’s framework supports the workflows it needs; the main caveat is that those capabilities vary by integration.

Key features

Reliability and flaky-test workflows

Captain measures test reliability and detects flaky tests automatically. It can retry failures and quarantine flaky tests to unblock builds, while a web interface supports reviewing results and managing retries and quarantines. This gives teams a focused way to contain intermittent failures, though quarantining tests means they no longer follow the ordinary build path and should remain visible to the team.

Parallel test execution

Captain tracks test runtimes and balances test files across parallel jobs, helping teams distribute suite work by observed duration rather than splitting files blindly. Pro adds automatically rebalanced partitions. That capability is not universal: the documented xUnit integration does not include partitioning, so framework-specific coverage matters before relying on it.

Framework and CI integrations

Documented framework integrations include xUnit, ExUnit, Ginkgo, go test, Bun, Cucumber, Cypress, Jest, Karma, Mocha, Playwright, TestCafe, Vitest, PHPUnit, pytest, unittest, Ruby Cucumber, minitest, and RSpec. The documentation also names RWX, GitHub Actions, CircleCI, Buildkite, and GitLab as CI integrations. Coverage differs by framework; for example, Karma does not list retries or partitioning. Teams should confirm that their required operations are supported in their particular integration.

Analytics and security

Captain Pro provides analytics on problematic flaky tests and test-performance trends with 90 day retention. RWX says it is SOC 2 Type 2 compliant and that Drata tests its security and IT infrastructure daily. Support includes documentation, GitHub issues for open-source tools, Discord access to RWX’s engineering team, and shared Slack channels for existing customers.

Pricing

Captain uses a freemium model, with a free OSS plan and paid plans from $10.

OSS covers the core workflows without a stated usage charge, making it the natural starting point for teams that do not need Pro analytics or automatic partition rebalancing. Pro’s price is tied to each million test results uploaded, so teams should weigh that usage basis against the added analytics and UI workflow. Enterprise suits organizations that need custom commercial terms and scale; it does not have a published fixed price.

Platforms

Captain supports API, Linux, macOS, web, and Windows. Its CLI is paired with a web interface for analyzing results and managing flaky tests, quarantine, retries, and suite partitioning.

Who it's for

Captain is best suited to software teams whose framework integration supports the reliability and partitioning features they intend to use, particularly teams working to keep flaky tests from blocking CI builds. It is a less convincing choice when a required workflow is absent from the team’s integration or when the team needs consistent feature coverage across frameworks.

Pros and cons

• Pros: The free OSS plan combines flaky-test tracking, quarantine, retries, and partitioning, giving teams a broad starting set of test-management workflows.
• Pros: Runtime-aware balancing and Pro’s automatic rebalancing target parallel-job distribution as test durations change.
• Pros: The framework and CI integration lists cover a range of commonly used test frameworks and CI platforms.
• Cons: Framework integrations do not share uniform capabilities; some omit partitioning, retries, or both.
• Cons: Pro pricing is based on test results uploaded, so the cost depends on usage rather than a single flat monthly amount.

Alternatives

For a broader comparison of tools focused on flaky tests, see Test Flakiness Management Software.

• HyperExecute is worth considering if its free plan’s 300 testing minutes and two concurrent sessions on Windows or Linux VMs suit the workload.
• Bitbucket Pipelines may fit teams prioritizing its free tier’s allowance for up to five users and unlimited public and private repositories.
• Buildkite is an option for teams whose needs align with its free plan’s allowance for up to five users and ten concurrent jobs.
• CircleCI offers a Performance plan starting at $15 a month, with 30,000 credits and five active users included free.
• Cypress may suit teams looking for a free starter plan with 10 users and 500 test results per month.
• Qualflare is an alternative with a free Starter plan for one project and one active user.
• TeamCity offers a free on-premises Professional plan with unlimited users and three build agents.
• Testery is another option, with a Growth plan that includes 10 test execution hours and 10 parallel test runners before hourly charges apply.

Verdict

Choose Captain if your team wants an open-source starting point for flaky-test detection, retries, quarantine, and parallel suite management, and its framework integration covers the workflows you need. Look elsewhere if you require feature parity across integrations or if Captain’s usage-based Pro pricing does not suit your testing volume.