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Jest vs Keploy
Short answer: Pick Jest if you want zero-config JavaScript testing; pick Keploy if you want traffic-driven test generation and sandboxed replay. Jest is free and open source; Keploy has a free plan, paid from $19/month per user.
JestJavaScript testing frameworkWhich to pick
Pick Jest if you want…
- Zero-config JavaScript testing
- Browser end-to-end testing
- A free, open-source tool
- Integrations with Babel, TypeScript or React (on Jest's list, not Keploy's)
Pick Keploy if you want…
- Traffic-driven test generation and sandboxed replay
- Integrations with Go, Java or Python (on Keploy's list, not Jest's)
Side by side
- What it is
- Jest:Jest is a JavaScript testing framework that provides zero-config unit, snapshot, and coverage testing.
- Keploy:Keploy captures real traffic with eBPF to auto-generate API tests, mocks and regression suites.
- Best for
- Jest:Zero-config JavaScript testing
- Keploy:Traffic-driven test generation and sandboxed replay
- Who it’s for
- Jest:JavaScript developers needing fast, reliable tests.
- Keploy:Developers and engineering teams needing automated integration and API testing.
- Pricing
- Jest:Open source
- Keploy:Freemium
- Starting price
- Jest:Free
- Keploy:$19/month per user (Pro)
- Free plan or trial
- Jest:Free to use
- Keploy:Free trial
- Plans
- Jest:—
- Keploy:Pro $19/user/mo per month
- Open source
- Jest:Yes, 45,459 GitHub stars
- Keploy:Yes, 18,697 GitHub stars
- Works with
- Jest:Babel, TypeScript, Node, React, Angular, Vue
- Keploy:Node, Go, Java, Python, GitHub, GitLab, Jenkins, Argo
Jest features
- Zero config. Works out of the box on most JavaScript projects without needing configuration.
- Snapshot testing. Creates and compares snapshots of large objects inline or alongside tests.
- Parallel isolation. Runs tests in separate processes for maximum performance and reliable global state.
- Built-in code coverage. Generates coverage reports with the --coverage flag, no extra setup required.
- Easy mocking. Custom resolver and Mock Functions API let you mock imports and spy on calls easily.
- Rich assertions. Provides a comprehensive expect API with detailed failure messages.
Keploy features
- Live traffic capture. Records HTTP, gRPC, GraphQL, Kafka and database calls via eBPF without code changes.
- Auto test generation. Creates realistic API tests and edge-case scenarios from captured traffic and OpenAPI specs.
- Dependency mocking. Generates smart mocks for databases, queues, caches and third-party APIs.
- CI/CD replay. Runs captured traffic as regression tests in CI pipelines with isolation.
- AI-enhanced testing. Uses OpenAI/Gemini to expand edge cases, self-heal tests and detect bugs.
- Kubernetes support. Records traffic from Kubernetes clusters and provides production-grade dashboards.
- Team collaboration. Provides shared mock registry, viewer seats and role-based access controls.
- Open-source core. Core platform is Apache-2.0 licensed; enterprise adds advanced features.
Jest vs Keploy FAQ
What is the difference between Jest and Keploy?+
Cypress focuses on browser UI testing; Keploy targets API/traffic-driven integration testing.
Should I use Jest or Keploy?+
Pick Jest if you want zero-config JavaScript testing, browser end-to-end testing or a free, open-source tool. Pick Keploy if you want traffic-driven test generation and sandboxed replay or integrations with Go, Java or Python (on Keploy's list, not Jest's).
Is Jest or Keploy free?+
Jest is free and open source. Keploy has a free plan; paid plans start at $19/month per user (Pro).
Which is cheaper, Jest or Keploy?+
Jest is free, so it costs less. Keploy starts at $19/month per user (Pro).
Is Jest or Keploy open source?+
Yes, both are open source: Jest (jestjs/jest on GitHub, MIT license) and Keploy (keploy/keploy on GitHub, Apache-2.0 license).
Do Jest and Keploy integrate with the same tools?+
Partly. Both list Node. Jest also lists Babel, TypeScript, React, Angular and 1 more; Keploy also lists Go, Java, Python, GitHub and 9 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.