Best On-Premises API Design Software of 2025

Engineered for peak performance and efficient resource use, KrakenD can manage a staggering 70k requests per second on just one instance. Its stateless build ensures hassle-free scalability, sidelining complications like database upkeep or node synchronization. In terms of features, KrakenD is a jack-of-all-trades. It accommodates multiple protocols and API standards, offering granular access control, data shaping, and caching capabilities. A standout feature is its Backend For Frontend pattern, which consolidates various API calls into a single response, simplifying client interactions. On the security front, KrakenD is OWASP-compliant and data-agnostic, streamlining regulatory adherence. Operational ease comes via its declarative setup and robust third-party tool integration. With its open-source community edition and transparent pricing model, KrakenD is the go-to API Gateway for organizations that refuse to compromise on performance or scalability.

Manage APIs seamlessly across both cloud environments and on-premises systems: Alongside Azure, implement API gateways in conjunction with APIs hosted in various cloud platforms and local servers to enhance the flow of API traffic. Ensure that you meet security and compliance standards while benefiting from a cohesive management experience and comprehensive visibility over all internal and external APIs. Accelerate your operations with integrated API management: Modern enterprises are increasingly leveraging API architectures to foster growth. Simplify your processes within hybrid and multi-cloud settings by utilizing a centralized platform for overseeing all your APIs. Safeguard your resources effectively: Choose to selectively share data and services with employees, partners, and clients by enforcing authentication, authorization, and usage restrictions to maintain control over access. By doing so, you can ensure that your systems remain secure while still allowing for collaboration and efficient interaction.

Directus is an Open Data Platform that allows you to manage any SQL database's content. It offers a powerful API layer to developers and an intuitive app for non-technical users. Directus is written entirely in JavaScript (primarily Node.js or Vue.js), and it is modular and extensible. This allows it to be tailored to your specific project needs. Our platform can be used to manage digital experiences as a headless CMS, a database client for democratizing information, or as a standalone web app for back-office CRM, inventory, business intelligence and project management.

DreamFactory is a REST API Management Platform. Auto Generate REST APIs. A cloud-based or on-premise API generation platform that is enterprise-grade. Instantly generate database APIs to build faster applications. The biggest bottleneck in modern IT is eliminated. Your project can be launched in weeks instead of months. DreamFactory creates a secure, standardized and reusable, fully documented, live REST API. DreamFactory can integrate any SQL or NoSQL file storage system or SOAP service. It instantly creates a RESTAPI with Swagger documentation, user role, and more. Every API endpoint is secured with User Management, Role Based Access Controls, SSO Authentication and Swagger documentation. Rapidly create mobile, web and IoT apps using REST-based APIs. DreamFactory offers example apps for iOS, Android and Titanium.

Experience stunning API documentation that is cherished by both teams and users alike. Finally, you can create API documentation that your entire team can take pride in. In mere seconds, you can publish visually appealing API reference documents and customize them in just a few minutes. Instantly satisfy developers with essential features such as three-panel layouts, an interactive try-it console, automatically generated code snippets, SEO optimization, and an intuitive search function. Everyone knows that outdated documentation and scope creep can lead to frustration. Keep your API documentation up-to-date by integrating your preferred source control with our cloud-based workflows. Our platform is compatible with a wide range of options, including on-premise solutions and various API management systems. Set up a comprehensive developer portal within minutes by leveraging your API definitions as valuable assets. Enhance the experience with tutorials, quick-start guides, and developer tools, all while enjoying extensive customization options. Ensure your API definitions are validated, linted, and bundled seamlessly, allowing for the creation of consistently on-spec OpenAPI documents. Connect your API reference and tailor every detail to impress your API consumers, ultimately fostering a more engaging and productive environment for developers. With these capabilities, your documentation will not only serve its purpose but also become a pivotal resource for ongoing collaboration.

Harness the advantages of contract-driven development to accelerate the creation and deployment of your microservices and micro frontends with confidence. By shifting left and eliminating the need for traditional integration tests, you can utilize API specifications as executable contracts to catch compatibility issues among your microservices early in the development process. This approach allows for parallel development, significantly reducing cycle times and enabling you to bring products to market at unprecedented speeds. As your project undergoes integration testing, potential integration problems are greatly reduced, leading to a more seamless, robust, and efficient workflow. Foster collaboration between your frontend and backend teams by easily aligning on API designs and specifications. Quickly transform your API specifications into tests at no cost and without writing code, running them against your services to catch integration issues proactively. Additionally, our innovative “no code” method allows you to detect backward incompatible changes simply by comparing two API specification versions, streamlining your development efforts even further. Ultimately, this approach not only enhances team collaboration but also contributes to a more agile and responsive development environment.

Mockoon provides a wide array of features that simplify the process of API mocking significantly. By downloading the latest version of Mockoon, you can begin crafting mock APIs immediately! You have the flexibility to create an unlimited number of mock APIs, each with countless routes, and can run them simultaneously. Additionally, the command-line interface (CLI) enables you to execute your mock APIs in various automated environments, such as servers, CI/CD pipelines, and GitHub Actions. The tool supports importing and exporting mock APIs in the Swagger/OpenAPI format, streamlining integration with other platforms. You can configure your mock APIs to deliver multiple responses based on specific rules or randomly, complete with any headers, body content, or HTTP status codes you choose. Furthermore, Mockoon allows you to serve your mock API over a secure TLS connection using a self-signed certificate. You can customize your routes by adding specific response headers and enjoy features like auto-completion for ease of use. The application also lets you introduce latency at both the environment and route levels, or even combine both settings for more nuanced testing. To assist with troubleshooting, all incoming requests and outgoing responses are meticulously logged, making debugging much simpler. In addition, Mockoon's proxy mode can redirect any undefined routes to a designated host, ensuring that your mock environment remains functional. Finally, it also includes file serving capabilities, complete with automatic MIME type detection and support for templating, enhancing the versatility of your mock API setup.

A Comprehensive Solution for Developing, Testing, and Securing APIs. Revolutionize the way you create, evaluate, and oversee your APIs. Work collaboratively, execute tests locally, and safeguard sensitive information throughout the entire process. Instant Access, No Signup Required Begin using our platform immediately—eliminate the hassle of cumbersome registration or sign-in procedures. Integrations with VS Code & Desktop Applications Utilize our VS Code extension and desktop applications to ensure a smooth integration with your preferred working environment. Secure Local Storage & Execution Maintain the safety of your data through local storage and execution, which guarantees that confidential information remains on your device. Unlimited Collection Testing Effortlessly test and manage an infinite number of API collections, allowing for seamless scalability across all your initiatives. Create Mock Servers Enhance your development process by setting up mock servers that facilitate rapid testing and simulation of API responses. User-Friendly Testing & Playground Make testing easier with our intuitive interface—explore APIs without the need for any coding. Our advanced enterprise capabilities elevate your API management experience. Reach out to us for more information and to see how we can assist you further!

In order to transform into enablers rather than obstacles, numerous IT departments are turning to integration platforms that empower users to independently manage their projects without depending on IT professionals. With challenges like budget cuts, a difficult journey to the cloud, and an ever-growing backlog of projects, IT faces unprecedented pressures. To shift from being seen as a barrier to a vital asset, many IT organizations are adopting solutions that allow for user-driven project completion instead of relying on IT specialists. The Axway Amplify Platform serves as a comprehensive enterprise integration solution designed to simplify integration complexities, uphold IT policies, and scale operations effectively. This platform allows teams to eliminate redundant, one-time integrations and instead concentrate on creating reusable integrations that can be utilized by a broader range of internal and external stakeholders. Additionally, by transitioning on-premises integration systems to the cloud or enhancing them with hybrid deployments, organizations can achieve significant cost efficiencies and enhanced scalability, offering even more advantages for modern business needs.

All API platforms can manage the API lifecycle, enable digital transformation, and ensure compliance. As businesses seek to connect with their customers and partners, API management is becoming an increasingly important part of digital transformation. Akana is an API management tool that can be used to manage APIs throughout their entire lifecycle. It allows you to design, implement, secure, manage, monitor, and publish APIs. Akana is well-suited for large, diverse enterprises and federated API partner networks. It can be deployed natively on-premises or across clouds, and allows customers to securely deploy via an integrated no code portal. Configurable analytic reports allow you to extract deep business insights from API traffic. Use targeted developer portals to socialize and manage your communities.