Captain

Overview

Captain is an open-source command-line tool for teams that need to manage flaky tests and divide test suites across parallel jobs. It is best suited to engineering teams whose framework integration supports the workflows they need. Its focused feature set is useful, but capabilities vary by framework.

Key features

Reliability, retries, and quarantine

Captain measures test reliability and detects flaky tests, then lets teams retry failures or quarantine flaky tests to keep them from blocking builds. The web interface provides a place to review results and manage these workflows. This is a practical fit when intermittent failures disrupt CI, though quarantining requires teams to keep track of tests removed from the normal build path.

Suite partitioning

Captain tracks test runtimes and balances files across parallel jobs; Pro adds automatically rebalanced partitions. That can help teams distribute work as runtimes shift. Support is integration-dependent: the xUnit integration does not include partitioning, so teams should confirm their framework's capabilities before relying on it.

Frameworks and CI platforms

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 is broad, but it does not mean every workflow is supported in every framework: Karma, for example, does not list retries or partitioning.

Analytics and security

Pro adds 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 the engineering team, and shared Slack channels for existing customers.

Pricing

Captain uses a freemium model. OSS costs nothing, billed Free, and includes file-based configuration, parallel test suite partitioning, flaky-test tracking and quarantine, and retries for failed tests. It is the natural starting point for teams that can work within file-based configuration and do not need Pro analytics.

Pro costs from $10 (priced on request), billed per million test results uploaded. It adds automatically rebalanced partitions, UI quarantine, flaky-test analytics, and 90-day performance-trend retention. The uploaded-results billing basis matters for teams estimating spend; Pro's price is tied to result volume rather than a flat monthly amount.

Enterprise has custom pricing and includes custom contracts, custom invoicing, and unlimited scale. It suits organizations that need those terms or scale provisions; the OSS and Pro plans do not include them.

Platforms

Captain is listed for API, Linux, macOS, web, and Windows. Its CLI and web interface serve distinct parts of the workflow: command-line test management and browser-based result review.

Who it's for

Captain makes the most sense for teams with flaky-test disruption, a supported framework, and a reason to retry, quarantine, or partition tests without adopting a broader CI product. Teams that need consistent capabilities across frameworks should check integration-specific limits first. Its open-source OSS plan also gives teams a way to begin without a paid plan.

Pros and cons

• Pros: OSS includes retries, quarantine, flaky-test tracking, and suite partitioning at no charge.
• Pros: The documented integrations cover a wide range of testing frameworks and several CI platforms.
• Pros: Pro combines UI quarantine with flaky-test analytics and 90-day performance trends.
• Cons: Framework support is uneven; xUnit lacks partitioning, while Karma does not list retries or partitioning.
• Cons: Pro is priced per million uploaded test results, so cost depends on usage.

Alternatives

Test Flakiness Management Software is a category guide for comparing tools in this area. Choose Bitbucket Pipelines instead if a free CI option with up to five users, unlimited public and private repositories, 1 GB of LFS storage, and 50 build minutes per month better fits your needs. Cypress is another freemium option, with a Starter plan that includes 10 users, 500 test results per month, 100 prompt executions per month, and 30-day access to paid features.

HyperExecute offers a free plan with 300 testing minutes, up to two concurrent sessions, and Windows or Linux VMs. Qualflare has a free Starter plan with one project, one active user, 200 test cases, and 100 test reports. TeamCity offers a free on-premises Professional plan with unlimited users, three build agents, and 100 build configurations.

Testery is an alternative with a Growth plan that provides 10 test execution hours and 10 parallel test runners for $0 per month, then $1.20 per hour. Buildkite has a free plan with up to five users, 10 concurrent jobs, and 2,000 Linux vCPU minutes per month. CircleCI offers a Performance plan starting at $15 /month, with 30,000 credits and five active users included free.

Verdict

Choose Captain if flaky tests are obstructing CI and your framework supports the retries, quarantine, or partitioning workflows you need. Its free OSS plan makes those core tools accessible, while Pro adds richer analysis and automatically rebalanced partitions. Look elsewhere if your framework lacks a required capability or if per-million-result pricing does not suit your usage.