Keploy

Keploy is an innovative, AI-powered testing platform designed to solve one of the most persistent challenges in modern software development: achieving comprehensive test coverage without the immense manual effort and time investment. It is built for developers and engineering teams who are tired of the traditional, slow, and brittle process of writing and maintaining unit, integration, and API tests. Keploy's core value proposition is its ability to automatically generate stable, high-coverage test cases and mocks by simply recording real user traffic and API calls from your running application. This means developers can shift from manually authoring tests to automatically capturing them from actual behavior, achieving up to 90% coverage in minutes, not weeks. By supporting popular languages like Go, Java, Node.js, and Python, Keploy integrates seamlessly into diverse tech stacks, allowing teams to focus on building features and improving code quality rather than getting bogged down in testing logistics. It transforms testing from a bottleneck into a seamless, automated part of the development lifecycle.

AI-Powered Test & Mock Generation

Keploy's AI engine intelligently records all API calls, database queries, and external dependencies during application runtime. It then automatically transforms this traffic into executable test cases and corresponding mocks or stubs. This eliminates the need for developers to manually write complex test logic or mock definitions, ensuring tests are based on real-world usage patterns and are inherently stable and deterministic.

Record and Replay in Isolated Sandbox

The platform allows you to record API traffic directly from your live application or local environment. These recorded sessions can then be replayed in a completely isolated sandbox within your CI/CD pipeline. This isolation ensures tests are consistent, fast, and free from flakiness caused by external dependencies or shared state, providing reliable results every time the pipeline runs.

Comprehensive Coverage Reporting

Keploy provides detailed, actionable insights into your test coverage. It goes beyond simple line coverage to show which APIs, code paths, and integrations are tested. This visibility helps teams identify critical gaps in their test suites, prioritize testing efforts, and confidently measure progress toward quality goals, ensuring no regression slips through.

Performance Testing Integration

Beyond functional correctness, Keploy can leverage the recorded traffic patterns to generate performance and load tests. By simulating real-user behavior at scale, teams can identify performance bottlenecks, latency issues, and system limits early in the development cycle, enabling proactive optimization of application performance and reliability.

Accelerating Legacy Code Testing

For teams maintaining large, untested legacy codebases, writing a comprehensive test suite from scratch is daunting. Keploy can be attached to the running application to automatically generate a foundational test suite from real traffic, dramatically reducing the initial effort and risk associated with modernizing and refactoring legacy systems.

Ensuring Reliability in Microservices

In a microservices architecture, testing service integrations is complex and time-consuming. Keploy excels at recording inter-service communications and generating integration tests with accurate mocks for each dependency. This ensures that each service can be tested in isolation while faithfully simulating its interactions with others.

Streamlining CI/CD Pipeline Testing

Development teams can integrate Keploy into their CI/CD pipelines to automatically generate and run tests with every build. This creates a fast, automated feedback loop where any regression introduced by new code is caught immediately, significantly improving deployment confidence and speeding up release cycles.

Enhancing Developer Productivity

Developers can use Keploy during feature development to automatically create tests for new APIs as they are being built and tested manually. This shifts testing left seamlessly, embedding quality assurance into the development workflow itself and freeing developers from the tedious task of manual test creation.

How does Keploy generate tests without writing code?

Keploy works by recording the network interactions (HTTP API calls, database queries, etc.) of your running application. Its AI engine analyzes this traffic to understand the application's behavior, request/response structures, and dependencies. It then automatically synthesizes this data into executable test cases and creates intelligent mocks for external services, all without requiring manual test script writing.

What programming languages does Keploy support?

Keploy offers broad language support to fit into diverse development environments. It currently provides dedicated support for Go, Java, Node.js (JavaScript/TypeScript), and Python. This allows development teams across different tech stacks to leverage its automated testing capabilities.

Is Keploy an open-source tool?

Yes, Keploy has a strong open-source foundation. The core Keploy engine is available as open-source software, which has garnered significant community adoption with over 15.6k stars on GitHub. The company also offers commercial cloud and enterprise solutions with additional features, support, and scalability for teams.

Can Keploy tests replace all my manually written tests?

Keploy is designed to automate the creation of the majority of your integration and API test suites, potentially covering up to 90% of your testing needs. It excels at generating tests for existing behavior and new features as you build them. However, unit tests for complex business logic or very specific edge cases might still benefit from manual authoring. Keploy aims to handle the bulk, freeing you to focus on the most critical and complex testing scenarios.