Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux




Mock Server is described as 'Instantly create HTTP mock API endpoints with custom responses, dynamic path params, custom headers, configurable delays, and real-time traffic logs' and is an app in the development category. There are five alternatives to Mock Server for Mac, Windows, Linux, Web-based and SaaS. The best Mock Server alternative is Mockoon, which is both free and Open Source. Other great apps like Mock Server are mockd, Beeceptor, WireMock and Mockable.
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.




Multi-protocol mock server for HTTP, gRPC, GraphQL, WebSocket, MQTT, SSE, and SOAP. One Go binary, zero dependencies. Supports stateful CRUD, digital twins (passes real SDK tests), chaos engineering, OpenAPI/Postman/HAR/cURL import, and a built-in MCP server for AI agents.


Build a mock Rest API endpoint in seconds. Helps you in UI development, Webhooks, simulating delays, simulating exceptions and server errors, performance test, etc.



WireMock is a simulator for HTTP-based APIs. Some might consider it a service virtualization tool or a mock server.



