Keploy

Overview

Keploy is an open-source testing platform that automatically converts real user traffic into executable test cases and data stubs. Instead of manually writing complex integration tests or maintaining fragile mocks, engineers can simply run their application once under real conditions and let Keploy capture deterministic test suites from the live calls. These tests can then be replayed directly in your CI/CD pipeline to validate changes, prevent regressions, and keep services stable as they evolve. Keploy sits alongside your application stack, recording network interactions, requests, responses, and dependencies, and turning them into language-agnostic tests without impacting business logic. This makes it especially powerful for microservices, APIs, and backend systems where integration coverage is critical but costly to maintain by hand. With traffic-based testing, teams can quickly bootstrap coverage on existing services, onboard new developers faster, and verify refactors with high confidence. Designed for modern development workflows, Keploy integrates with popular tools and frameworks, supports stubbing external services, and helps ensure reproducible environments across dev, staging, and production. Whether you are building new cloud-native services or trying to improve test reliability in a legacy system, Keploy provides a pragmatic path to robust, realistic testing driven by real user behavior.