Mockoon Alternatives (September 2025)

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.

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

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.

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.

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

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

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.

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

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

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.

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.

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!

A powerful CMS, BaaS, and more. Power any project with Directus – a composable data platform to easily create and deploy data-rich apps.

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

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.

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

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

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

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

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

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

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

Snipe-IT is a free, open source IT asset management system written in PHP

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

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.

Appwrite is an open-source platform for building applications at any scale, using your preferred programming languages and tools.

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

WeWeb is an no-code front-end builder that you can use to build on-top of any back-end. Try it out for free, and start building your web app today!

Instantly generate APIs from any database with built-in enterprise security controls that operates on-premises, air-gapped, or in the cloud.

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

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.

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.

Create interactive, realistic prototypes that work like the actual digital product. Ideal for designers prototyping for mobile, desktop, web, or IoT. Try for free.

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

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.

Instant Web API will create your code in minutes. No coding required. Just run Instant Web API and let it do the work for you. Web API code generating software for MSSQL and PosgreSQL.

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

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

Free lifetime account. Simple to learn, quick to master. Design interactive prototypes for Android, iOS, web and desktop in minutes.

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

We provide simple and affordable open source data tools and utilities for small businesses. AppGini: Nocode collaborative applications in minutes. AppGini plugins to add powerful reports, advanced search, batch actions, and more.

GDevelop is a free, fast, easy, open-source game engine. Learn 2D and 3D game development with our tutorials. Publish everywhere: iOS, Android, Steam...

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

HTML to PDF API : Generate beautiful PDF documents or PNG screenshots with an API and store them directly in your own S3 bucket without compromising privacy with a managed Puppeteer

Svix is the enterprise ready webhook service. Build a state of the art webhook platform in minutes with our hosted webhook SaaS or our open source project. Don't reinvent the wheel, use webhooks as a service.

Maqetta - Visual authoring of HTML5 user interfaces - in the browser

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

Xojo is a cross-platform development tool and object-oriented programming language for creating powerful, native applications for macOS, Windows, Linux, the web, iOS, Android and Raspberry Pi.

Build apps at lightning speed with a visual low-code app builder featuring UI, Codeless logic, real-time database, messaging, and more.

Data science and machine learning in the cloud in seconds—Use R and Python with GPUs, Dask clusters, and more

Baserow allows you to create databases and applications without code. Streamline your data management, collaborate in real-time, and scale with maximum flexibility. Self-host for unlimited rows and storage. Try for free today!

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.

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.

PHP cloud server control panel that support Digital Ocean, Linode, AWS, Vultr, Azure and other custom VPS. Git deployment webhook and easiest control panel to manage Laravel, Cake, Symphony or WordPress.

Secure your private business network with a self-hosted VPN, Access Server, ideal for cloud or on-premise setups. Free with 2 simultaneous VPN connections.

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

Easily create web and mobile app prototypes and wireframes with Justinmind UI prototyping tool. It's FREE. Start prototyping now!

Get the most powerful and easy-to-configure continuous integration and delivery platform.

The easiest way to get access to current or historical news content from over 150,000 global news sources. Articles with all collected meta-data and extensive information extracted by AI can be retrieved in a JSON format.

Free IP Geolocation API, the most accurate data, use our API to quickly and easily integrate the location of visitors into your script or website.

AppMaster is a No-Code platform designed to help businesses create production-level applications with source code generation: backend, web, and native mobile apps.

Budibase is an open source low-code platform and the easiest way to build, automate, and ship internal tools. Check it out.

Create custom QR Codes with Logo, Color and Design for free. This QR Code Maker offers free vector formats for best print quality.'

Get secure & easy remote access to desktops with Zoho Assist, the best remote support software trusted by global brands. Try our remote management software for free!

Retool is the fastest way to build internal software. Use Retool's building blocks to build apps and workflow automations that connect to your databases and APIs, instantly.

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.

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

SimpleMDM is the premiere Apple MDM solution for your business that's easy to use and includes advanced functionality previously reserved for enterprise suites.

DesignEvo's free logo maker helps you create custom logos in minutes, no design experience needed. Try with millions of icons and 100+ fonts immediately!

Free IP Geolocation API and Accurate IP Database provides country, city, zip code, ISP data in REST JSON and XML format from any IPv4 and IPv6 Address.

Platform teams need control. Dev teams need autonomy. Uffizzi provides a multi-tenant, Kubernetes-native foundation that accomplishes both.

Cuckoo Sandbox is the leading open source automated malware analysis system.

Our powerful, no-code platform designed for big data analysis, enabling anyone to effortlessly explore and analyze vast datasets via a user-friendly, spreadsheet-like interface. Gigasheet supports a wide variety of data sources from CSV, XLSX, and JSON to popular CRMs, data warehouses, and cloud data stores.

The top-rated FTP Server solution for fast, reliable, secure enterprise file transfer via FTPS, SFTP, HTTPS, and MFT solutions.

Create and share professional product catalogs. Customize templates for your products with images, attributes and tiered pricing. Sign up to design your catalog!

Access current and historical foreign exchange rates with Fixer API. Get free, lightweight currency conversion for your applications. Click now.

H5P empowers everyone to create, share and reuse interactive content - all you need is a web browser and a web site that supports H5P.

Render is a unified cloud to build and run all your apps and websites with free TLS certificates, global CDN, private networks and auto deploys from Git.

Greenshot allows you to make and to edit screenshots simply. The application allows to ‘capture’ window, a portion of the screen or the entire screen.

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.

Legalesign is a powerful eSignature API for developers. Fast, Easy & Scalable API solution for online document signing. Secure & Easy to integrate REST API.

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

Zulip is an organized team chat app, designed for efficient communication.

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

Simple translation editor for gettext, XLIFF and JSON

The only free, fully open source and self-hosted WordPress plugin for maintaining multiple sites from one location.

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

An easy, intuitive tool to make 2D hand-drawn animations.

Deliver the search results you want with Bing's Custom Search API. This easy-to-use and ad-free customized search tool gives you powerful ranking and more.

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

TinyMCE is the most advanced WYSIWYG HTML editor designed to simplify website content creation. The rich text editing platform that helped launched Atlassian, Medium, Evernote and more.

Try our free logo maker. Trusted by 30M+ businesses, our online logo generator makes it easy to find the best logo for your business. Make your logo now!

MuukTest: AI-driven test automation services for rapid, hassle-free QA, boosting test coverage to 95% in 3 months.

EDI software tools to translate, generate, validate and acknowledge X12, HIPAA, EDIFACT, EANCOM, VDA, PNRGOV, HL7, NCPDP, IAIABC, EDIGAS

A stand-alone browser and devtool that helps you build better sites in less time. All the tools you need in one app.

Private cloud A/B testing tool that offers collaboration features and a group sequential testing engine that speeds up experiments by 20%-80%.