WireMock Alternatives (September 2025)

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.

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

Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets

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.

Simplify API development for users, teams, and enterprises with our open source and professional toolset. Find out how Swagger can help you and get started today.

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

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.

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

Zuplo is the API management platform for developers. Build, deploy, and scale APIs faster with Zuplo.

k6 is an open-source tool and cloud service that makes load testing easy for developers and QA engineers.

API design tool from XapiHub, learn more on how you can streamline the api design process with a suite of tools today!

Publish always up-to-date API references, communicate changes to your users, improve discoverability and developer experience. Works with Swagger, OpenAPI, and AsyncAPI.

NinjaMock online wireframe and mockup tool. Create wireframes and mockups in minutes.

Eliminate the need for back-end development, instantly generate RESTful APIs with PrestoAPI.

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

Our API Management platform is fast, scalable, modern. Including an open source API Gateway, Analytics, Dev Portal and Dashboard.

Easily unify the management, security, and governance of both synchronous and asynchronous ecosystems with the leading open source API Management platform.

Gatling is a load testing tool for web applications designed for DevOps and Continuous Integration. Try Gatling now!

Empower your UI/UX design team with top prototyping solutions. Create interactive web or app wireframes and prototypes without any coding skills.

Kong is the most widely adopted API gateway and service mesh, powering the world’s APIs for modern architectures. Accelerate development and productivity today!

Nevatech Sentinet offers a flexible, lightweight and scalable API Management platform to help businesses maximize the value of their data. Try Nevatech Now!

Kong Gateway is the industry’s most trusted open source API gateway. Accelerate development and delivery of APIs and microservices with Kong Gateway today!

Moqups is a streamlined and intuitive web app that helps you create and collaborate on wireframes, mockups, diagrams and prototypes — for any type of project.

Create a REST API from any database. Hook up any SQL or NoSQL database and the CData API Server instantly generates flexible, comprehensive, & fully documented APIs.

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

Wireframe.cc is an innovative low-fidelity wireframing tool. Designers create and share better wireframes with a set of powerful, intuitive tools.

Enable the fast and secure delivery of PSD2-compliant APIs with Apigee open banking APIx.

Share code, track work, and ship software using integrated developer tools, hosted on-premises with Azure DevOps Server

MockFlow is an intuitive web app to simplify your product design process. A quick way to create and collaborate on wireframes for web, mobile, and desktop apps.

Real browser-based load testing for websites, web apps, and APIs. Generate user traffic from around the world to gain insight into system performance.

LoadForge is the ultimate web and API load testing and stress testing platform for modern DevOps.

Automate your GUI tests with QF-Test, the professional testing tool! Easy to use ✓ Cross-platform on Windows, Linux, macOS ✓ Cross-browser ✓

Mokkup.ai is a free dashboard wireframing tool. Build stunning dashboards with a wide range of templates across industry-wide categories.

NeoLoad simplifies and scales performance load testing for everything, from APIs and microservices, to end-to-end application testing.

Simplify API onboarding and consumption with an API Portal that’s purpose-built for API teams to create, secure, market, and monetize API products.

Discover Rapid's API Marketplace for easy API monetization and better API management. Learn about API testing tools and monetize your APIs effortlessly.

Flagsmith makes it easy to create and manage features flags. Use our hosted API, deploy to your own private cloud, or run on-premises.

SashiDo.io is a serverless API development platform with scalable json rest and graphql apis, headless cms, built with nodejs, mongodb, parse server, kubernetes and docker.

Novu empowers developers and product teams to collaborate seamlessly on notification management. Its unified platform provides centralized content, type-safe schemas, and reusable components, facilitating efficient workflows. With code-first and no-code tools, teams can easily customize and deploy notifications across multiple channels like email, SMS, push, chat, and in-app. Novu enhances communication, reduces friction, and ensures reliable, scalable, and personalized user experiences while maintaining full visibility and control over notifications.

Katalon is the all-in-one test automation platform for easy web, mobile, API, and desktop app testing. Create tests faster and enhance software quality today.

Balsamiq is the go-to low-fidelity wireframing tool for product managers, founders, devs, & UX teams worldwide. It's the fast, focused way to design, communicate, and share your ideas.

An open-source Backend-as-a-Service stack for web & mobile applications, based on RESTful APIs.

Explore the Fiddler family of web debugging proxy tools and troubleshooting solutions. Easily debug, mock, capture, and modify web and network traffic.

Create powerful beautiful documentation, hassle-free. DeveloperHub is hosted documentation portals service for Product and API Docs. Write your user guides, knowledge base, API and product documentation. Supports Swagger specification, search, collaboration, markdown, mobile devices and SEO. API Documentation as a service.

AI test automation platform supporting the development of high-speed, high-quality software. MagicPod is a test automation cloud service in the era of AI capable for both mobile app testing and browser (web app) testing. It supports the acceleration of release cycle with its wide variety of functions and high maintenance.

The Trusted Developer Experience platform for APIs. Achieve faster API onboarding via automatic SDKs, docs, code samples, and guided walkthroughs.

Simplify front-end testing with Cypress' open-source app. Explore our versatile testing frameworks for browser-based applications and components.

Try TeamCity - the powerful Continuous Integration and Deployment tool for Developers and DevOps Engineers.

The only load testing tool to record, replay, and test in real browsers at scale. Performance testing doesn't have to be the bottleneck. Cut your load testing time in half by running website performance tests in real browsers at scale. LoadNinja is the only load testing tool to record and replay scripts in minutes, leverage real browsers, and deliver actionable website performance data straight from the browser’s DOM.

Make your APIs easy to use and your developers successful.

Endtest is a low code test automation platform providing a complete solution to enable organizations to efficiently build automated end-to-end tests for web and mobile applications.

An easy-to-use test management tool to manage all your manual and automated test cases and runs in a single place.

The easiest way to add authentication and user management to your application. API-first & purpose-built for developers. Get started for free.

DevOps serverless application tools to run background tasks with Docker containers and manage messaging queues with cloud elasticity and no vendor lock-in

Tricentis qTest delivers the innovative testing tools agile teams need to create better software.

Simplify your automated testing for Salesforce with Provar's powerful automation solution. Ensure quality with a tool trusted by top companies.

Easily integrate electronic signatures into your apps and workflows with our secure, simple, and fast eSignature REST API. Create a free sandbox today.

Build document manipulation applications using High Code or Low Code APIs, or simply use cross-platform apps to view, compare, inspect or convert 100+ file formats. Explore Aspose, the leading provider of document processing APIs and software solutions.

Keygen is a powerful software licensing API for desktop apps, on-premise software and other software products written in C++, C#, Swift, Java, Kotlin, Node and more.

Confidently deliver the highest quality digital experiences at scale with mabl, the unified test automation platform for web, mobile, and APIs

Qodex.ai is an AI-powered QA automation tool for building, using, and testing web apps, mobile apps, and API testing.

Apache CloudStack is an opensource infrastructure-as-a-service cloud computing platform that is easy to use, turnkey, highly available and highly scalable.

Wireframe Tool, MockFrame by 500apps helps create interactive wireframes, mockups, prototypes, and more. Get access to 50 apps for $14.99 per user.

End-to-end Test Management tool for test case management. PractiTest provides full visibility, clear results, flexibility and integrations with many tools

BlazeMeter is your complete continuous testing platform. Get your apps ready for any device & any situation, all in one place with the premier load testing

Automated AI-powered tools to generate Code & Api documentation from your source code files.

TestRail is a test management platform that helps you streamline your software testing processes, get visibility into QA, and release high-quality software.

A flexible messaging platform that enables real-time integration and connects the Internet of Things (IoT).

Automatically generate high-quality PDF documents from reusable Word templates and JSON or Excel data with DocuGenerate’s API and web app · Start Generating for Free

Connected systems make you faster, more efficient, and highly competitive. In today’s world of fast moving business, connectivity is power.

Quickly see all of your endpoints, your slow endpoints, and your endpoints with errors.

Azure API Apps give you the tools to develop, host, secure, and share REST APIs in your organization or with the world.

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable. - Netflix/Hystrix

Easily execute distributed performance testing at scale with our robust enterprise software testing toolkit offering centralized asset sharing and execution.

Wondershare Mockitt offers rapid design and prototyping with intuitive features, allowing designers to collaborate effectively and do what they do best. New features are released with Mockitt AI, including AI prototype, AI flowchart, AI mind map, AI chart, AI tables, and magic fill.

Hookdeck is an Event Gateway. A platform giving engineering teams infrastructure and developer tooling to build, deploy, operate, and monitor event-driven applications.

ACCELQ is the most powerful software testing tool to achieve Codeless test automation and accelerate continuous testing

Time Machine® provides software virtual clocks that enable you to time travel your applications into the future or the past, facilitating time shift testing on your date and time sensitive application logic. Use for back date testing, forward date testing, regression testing, SAP, Agile/DevOps, and test automation

Open source record and playback test automation for the web

Free open source enterprise distributed VPN server. Virtualize your private networks across datacenters and provide simple remote access in minutes.

GoCD is an open source build and release tool from Thoughtworks. GoCD supports modern infrastructure and helps enterprise businesses get software delivered faster, safer, and more reliably.

WSO2 Micro Integrator is a robust and lightweight integration solution that simplifies digital transformation by offering seamless connectivity, flexible deployment options, API / event-driven integrations, and powerful data transformation capabilities with debugging and testing support.

ScraperAPI handles proxy rotation, browsers, and CAPTCHAs so developers can scrape any page with a single API call. Web scraping with 5,000 free API calls!

Meet Anypoint Platform, the only complete hybrid enterprise integration platform for SOA, SaaS and APIs. Anypoint Platform gives you the freedom to integrate what you want, when you want, whether its on-premises or in the cloud.

ConfigCat is a feature flag service with unlimited team size, awesome support, and a reasonable price tag that takes 10 mins to learn.

OpenStack is an open source cloud computing infrastructure software project and is one of the three most active open source projects in the world.

Open-Source, Full-Stack Microservice Solution.With out of the box, high performance, compatible with popular ecology, multi-language support Get started

IBM API Connect is software to rapidly create, secure and manage APIs. IBM API Connect can be deployed in any Red Hat OpenShift environment. It’s also available as SaaS in a shared or dedicated instance, and as part of IBM Cloud Pak for Integration.

JSCAPE MFT Server is a flexible, scalable managed file transfer solution that supports every protocol so you can unify and secure transfers. Learn more.

A curated framework of Open Source Platform components to accelerate the development of Smart Solutions.

Bunnyshell is an Environment as a Service platform that enables developers to instantly spin up dev environments for any task on Kubernetes and develop remotely.

Build better AI and API products with a powerful observability and monetization platform

DHTMLX UI libraries are pure JavaScript/HTML5 client-side widgets for high-speed web and mobile development. They are easily customizable and configurable via API.

A high performance, open source universal RPC …

ApexCharts is a a free and open-source modern charting library that helps developers to create beautiful and interactive visualizations for web pages.

Validate application performance without deployment headaches - our cloud load testing platform provides on-demand, fully managed stress and load testing.

Toggly makes it easier for software developers to build better software faster by making it easy to test, release, and measure features without the risk of downtime or other production impacts.

An open source Java EE 8-compliant application server that lets you build Java applications once and deploy them everywhere.