Keploy is a developer-centric testing platform that takes a fundamentally different approach to test generation. Instead of requiring developers to manually write test cases, Keploy uses eBPF to intercept real API traffic at the network layer, automatically converting those interactions into reproducible test suites with corresponding mocks and stubs. The platform supports recording of databases like PostgreSQL, MySQL, and MongoDB, message queues such as Kafka and RabbitMQ, and external API calls — all without requiring any SDK integration or code modifications.
The platform's replay engine creates isolated production sandboxes where captured traffic is deterministically replayed, enabling offline testing without external dependencies. Keploy automatically detects and removes duplicate tests that don't contribute to coverage, which is particularly valuable for large teams crowd-sourcing tests. It calculates both statement and branch coverage for developers, plus API schema and business use-case coverage for QA teams, making coverage metrics objective rather than subjective.
Keploy integrates natively with popular testing frameworks including JUnit, PyTest, Jest, and Go-Test, allowing teams to merge AI-generated coverage with existing unit tests for comprehensive coverage gating in CI/CD pipelines. The tool also offers a VS Code extension for in-editor testing workflows. With 16,700+ GitHub stars and adoption by teams at companies like Shopify, Keploy has established itself as a leading open-source alternative for backend testing automation.
