WireMock Alternatives (January 2026)

WireMock - flexible, open source API mocking | WireMock

WireMock is a tool for building mock APIs. API mocking enables you build stable, predictable development environments when the APIs you depend on are unreliable or don’t exist.

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Create mock APIs in seconds with Mockoon

https://mockoo

.com/

Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

Mocky: The world's easiest & fastest tool to mock your APIs

https://designer.mock

.io/

Don't wait for the backend to be ready, generate custom API responses with Mocky and start working on your application straightaway

REST API Documentation Tool | Swagger UI

https://swagge

.io/tools/swagger-ui/

Swagger UI allows development team to visualize and interact with the API’s resources without having any of the implementation logic in place. Learn more.

The World's Most Popular API Testing Tool | SoapUI

https://www.soapu

.org/

SoapUI is the world's most widely-used automated testing tool for SOAP and REST APIs. Write, run, integrate, and automate advanced API Tests with ease. See why millions of users trust SoapUI for testing their APIs today!

The All-In-One Automated API Testing Platform | ReadyAPI

https://smartbea

.com/product/ready-api/

The number one platform for Agile and DevOps teams, ReadyAPI powers functional, security, performance, and virtualization of SOAP & REST APIs.

OpenAPI Design & Documentation Management Tool | Stoplight

https://stopligh

.io/

With Stoplight, you can create OpenAPI descriptions, documentation, and mock servers much faster than other API tools — with no specialized knowledge required — all in one centralized platform.

Platform for API Design, Development & Documentation | Apiary

https://apiar

.io/

Apiary provides the leading API-First platform designed specifically to help companies accelerate and control the design, development, and documentation of APIs.

High-performance Open Source API Gateway | KrakenD

https://www.kraken

.io/

KrakenD is a high-performance Open Source API Gateway that enables you to build scalable and resilient microservices architectures.

Parasoft Virtualize: Service Virtualization Tool & Solution - Parasoft

https://www.parasof

.com/products/parasoft-virtualize/

Elevate testing efficiency with Parasoft Virtualize. Advanced service virtualization tools for robust simulation and seamless integration.