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Karate Labs

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(6)4.4/5

Karate is the open-source framework that unified API, UI, and performance testing. Used by 700+ companies including 76 of the Fortune 500, Karate now governs AI-built software: coverage you can prove, traceability to requirements, and a release verdict that never leaves your infrastructure. The open-source engine (MIT licensed, 8.9k+ GitHub stars, 2M+ monthly downloads) covers API testing for REST, GraphQL, and SOAP, browser and desktop UI automation, stateful service mocks, and performance testing via Gatling, all in one plain, readable syntax that anyone on the team can understand. Teams write about 60% less test code and re-use API tests as load tests. Karate Enterprise adds the governance layer for teams shipping AI-written code: • Karate Agent, the AI-native test runtime: authors tests in plain English, drives the browser, and recovers when UIs drift so tests survive refactors. Bring your own LLM (Claude, GPT, Gemini, Llama, Ollama), MCP-native for Claude Code and VS Code Copilot. • API Coverage: requirement-to-test traceability measured against the contract, with coverage graded exercised vs. claimed. A requirement that looks tested but never actually ran is surfaced, not hidden. • API Governance: deterministic OpenAPI linting scored into a ship verdict (READY / CONDITIONAL / NOT-READY). No model in the path: the AI explains, it never decides. • Async Protocol Pack: Kafka, gRPC, and WebSocket testing in the same syntax. • 100% self-hosted and air-gap ready. No telemetry, no outbound calls; your data never leaves your network. Featured in the Gartner® Market Guide for API & MCP Testing Tools (March 2026). Start free at https://karatelabs.io or https://github.com/karatelabs/karate

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