Kong Insomnia Alternatives (September 2025)

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

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

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.

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.

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.

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.

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.

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

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.

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

Kong Mesh is an enterprise-ready service mesh that provides security, reliability and observability for Kubernetes environments. Accelerate deployments today!

An open source Kubernetes Platform to manage enterprise-grade Kubernetes across hybrid cloud, multi-cloud and edge. Get started for free!

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

Make your APIs easy to use and your developers successful.

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

CodeSandbox is a cloud development platform that empowers developers to code, collaborate and ship projects of any size from any device in record time.

Address all the needs of API providers with the ‘Management Portal’ and API users with the ‘Developer Portal’. Start opening your APIs to finance ecosystem in seconds and easily implement your API Business Model.

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

Kubernetes message broker and message queue platform. An open-source project providing the most efficient way to connect microservices.

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.

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

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

Conektto is the best API design platform online for building great APIs. We understand what it takes to create an awesome API that leverages modern technology

Reimagine your application connectivity and API management with Traefik's unmatched approach to cloud native.

Alloy is an embedded integrations platform used by engineering and product teams to simplify & accelerate all aspects of integration development - from user-customizability to polling infrastructure.

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

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

Ambassador Labs - We build best-in-class Kubernetes-native productivity tools to safely design, develop, test, deploy, & monitor apps with speed & efficiency

Implement unified Kubernetes-native API gateways, load balancers, and ingress controllers across hybrid and multi-cloud Kubernetes environments.

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

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

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.

Peregrine Connect is an industry leading API, Application, and Workflow integration platform. Increase operational efficiency and reduce costs. Get a free 30 day trial. Learn more.

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.

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.

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

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.

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.

A collaborative Kubernetes-native development solution that delivers OpenShift workspaces and in-browser IDE for rapid cloud application development.

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

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.

Hygraph is the next generation GraphQL-Native Headless CMS powering mission-critical applications. Streamline content workflows, iterate faster and deliver to any destination of choice using our content APIs.

Unified APIs to build SaaS integrations. Launch the integrations your customers need in record time.

A high performance, open source universal RPC …

Dramatically simplify API integrations with Tray connectors, the Connector Builder, and our Authentication and Projects features. Visit Tray.io to learn more.

Red Hat Runtimes includes a collection of cloud-native runtimes for developing Java or JavaScript applications on OpenShift.

https://www.eclipse.org/che/

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.

Pliant’s API-driven orchestration platform automates, integrates, and connects the digital enterprise. With our low-code approach that transforms API code into deployment-ready action blocks, Pliant facilitates, integrates, and secures communication up and down the technology stack between platforms, services, and applications. Pliant accelerates traditionally manual tasks, eliminates silos, and reduces tool sprawl while accelerating innovation, productivity, and agility.

Production-Grade Container Orchestration

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.

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

Redpanda is a powerful, simple, and cost-efficient streaming data platform that is compatible with Kafka® APIs while eliminating Kafka complexity.

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

Traefik Mesh is an open source service mesh, easy to configure that allows visibility and management of the traffic flows inside any Kubernetes cluster.

Open-source self-hosted alternative to Vercel, Netlify, Raiway.app, Render or Heroku running on Kubernetes clusters.

Code faster with Komodo IDE from ActiveState. Best multi-language IDE for today's web languages - Python, PHP, Perl, Golang, Ruby and more.

A service mesh for observability, security in depth, and management that speeds deployment cycles.

Millions of devs and teams choose GitKraken Desktop to make Git more visual, accessible and collaborative. Download to use for free and to start a team trial.

API-First, multi-channel CMS, build multi-device presentation layers with your preferred frameworks and languages.

Devtron enables swift app containerization, seamless Kubernetes deployment, and peak performance optimization – simplify your app management today!

Deploy secure applications with StackHawk. Find and fix application security bugs in the build pipeline. Built for developers to own their AppSec

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!

Build native integrations fast with Truto. Integration is a solved problem. Why have your best engineers work on integrations when they can focus on architecture, design, and product?

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

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

Consul is a multi-cloud service networking platform to connect and secure services across any runtime platform and public or private cloud.

Gitea - Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD

API integration Platform-as-a-Service (iPaaS) provides capabilities offered by ESBs, data integration systems, API management tools and B2B gateways.

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

VMware Tanzu is a cloud native application platform that enables vital DevSecOps outcomes in a multi-cloud world.

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

The Eclipse Foundation provides our global community of individuals and organisations with a mature, scalable, and business-friendly environment for open source …

Cloud platform for web scraping, browser automation, and data for AI. Use 1,600+ ready-made tools, code templates, or order a custom solution.

The Eclipse Foundation provides our global community of individuals and organisations with a mature, scalable, and business-friendly environment for open source …

Cloud platform for web scraping, browser automation, and data for AI. Use 1,600+ ready-made tools, code templates, or order a custom solution.

Argonaut automates deployments of infrastructure and applications to your cloud account. Autogenerate and collaborate with your team on Terraform, CI/CD and App Deployment Configs in an instant.

Where the Cloudify documentation LIVES!

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

Instantly create, share, scale, and manage development environments.

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

Unlock the true potential of embedded software development with PlatformIO's collaborative ecosystem, embracing declarative principles, test-driven methodologies, and modern toolchains for unrivaled success.

Browse our developer-first, open source application delivery & hosting platform. Discover unmatched flexibility, up to 99.99% uptime, & exceptional support

Strapi is the next-gen headless CMS, open-source, javascript, enabling content-rich experiences to be created, managed and exposed to any digital device.

Kiali Project site

Accelerate your full-stack web and mobile app development with AWS Amplify. Easy to start, easy to scale. No cloud expertise needed.

CloudDefense.AI is an industry-leading multi-layered Cloud Native Application and Protection Platform (CNAPP) that safeguards your cloud infrastructure and cloud-native apps with unrivaled expertise, precision, and confidence.

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

Reliably lighten the Kubernetes Troubleshooting and Monitoring Workload for your DevOps and Developers.

The Appium automation project documentation

Amazon API Gateway helps you build HTTP, REST, and WebSocket APIs with a fully managed service that makes it easy to create, publish, maintain, manage, monitor, and secure APIs.

The most popular open source content collaboration platform for tens of millions of users at thousands of organizations across the globe

Oracle WebLogic Server is a unified, extensible platform for developing and deploying enterprise Java applications, on-premises or in the cloud.

CodeLobster - Free portable cross-platform PHP IDE with support Drupal, Smarty, Twig, WordPress, Joomla, JQuery, CodeIgniter, HTML, CSS, JavaScript, TypeScript, AngularJS, CakePHP, Python, Laravel, Phalcon, Symfony, Yii

A secure cloud management platform for automation, orchestration, cost and usage monitoring of public and private clouds, hypervisors and container hosts. Provides multi-cloud RBAC. Enables self service provisioning. Cost analytics and cloud spending optimization

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

Get out-of-the-box full stack monitoring and observability, expert guidance and actionable insights in a single intuitive interface with StackState.

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