Alternatives to Buildkite

High-performance build system for JavaScript and TypeScript monorepos

Programmable CI/CD pipelines as code in Go, Python, TypeScript, or Java. Runs locally and on any CI provider.

Microsofts open-source end-to-end browser testing framework for Chromium, Firefox, and WebKit with one API.

Git-friendly, fully offline API client that stores collections as plain text files in your repository.

Open-source workshop for building UI components in isolation. Preview, document, and test them outside the app.

API client and collaboration platform that started as a Chrome extension and now covers design, testing, and mocking.

Hosted continuous integration that runs your test suite in parallel containers across Linux, macOS, Windows, and ARM.

Open-source API client for REST, GraphQL, gRPC, and WebSockets. Postmans more polished, less corporate cousin.

Java testing framework that brings Spring Boot conventions and Playwright APIs to Selenium

Automatically investigate failing Playwright tests and open pull requests with fixes

WebSocket testing tools, protocol guides, and a Chrome extension for developers

Trace, grade and share proof that your AI agent actually works

Test and monitor conversational and data agents with adversarial scenarios and scored results

Build evals and custom benchmarks for real-world agent tasks

Independently test agent-written code and find failures before a pull request ships

Turn an API specification into runnable duplicate-action replay tests

Build reusable multi-step API tests without writing glue code

Free accessibility scanner that turns axe-core results into a plain-English fix list

Test, debug, and evaluate MCP servers across major AI clients

GPU health testing and validation platform for AI infrastructure running NVIDIA or AMD systems