Best Free API Gateways 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.

Tyk is an Open Source API Gateway and Management Platform that is leading in Open Source API Gateways and Management. It features an API gateway, analytics portal, dashboard, and a developer portal. Supporting REST, GraphQL, TCP and gRPC protocols We facilitate billions of transactions for thousands of innovative organisations. Tyk can be installed on-premises (Self-managed), Hybrid or fully SaaS.

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.

Ambassador Edge Stack, a Kubernetes-native API Gateway, provides simplicity, security, and scalability for some of the largest Kubernetes infrastructures in the world. Ambassador Edge Stack makes it easy to secure microservices with a complete set of security functionality including automatic TLS, authentication and rate limiting. WAF integration is also available. Fine-grained access control is also possible. The API Gateway is a Kubernetes-based ingress controller that supports a wide range of protocols, including gRPC, gRPC Web, TLS termination, and traffic management controls to ensure resource availability.

MuleSoft's Anypoint Platform serves as a comprehensive hybrid integration solution tailored for service-oriented architecture (SOA), software as a service (SaaS), and application programming interfaces (APIs). This platform provides developers with an extensive suite of tools that facilitate the design, construction, and management of the full lifecycle of APIs, applications, and products. At its foundation, Anypoint Platform utilizes open technologies, with Mule functioning as its primary runtime engine, ensuring flexibility and scalability for integration needs. Furthermore, the platform fosters collaboration among teams, allowing for more efficient development processes.

One platform to build, integrate, and expose your digital services as managed APIs in cloud, on-premises and hybrid architectures to support your digital transformation strategy. Integrate with your existing identity access and key management tools to implement industry-standard authorization flows, such as OAuth Connect, OpenID Connect, or JWTs. You can create APIs using existing services, manage APIs both from third-party providers and internally built applications, and monitor their usage, performance, and retirement. To optimize your developer support, improve your services and drive adoption, you can provide real-time access API usage and performance statistics for decision-makers.

GraphQL APIs can be used to combine multiple data sources. Features: Code-first GraphQL: Save time by coding efficiently using our code-first approach. Built for Node.js in Typescript: Combine the power of Typescript with the flexibility of Node.js. Connect to Multiple Datasources : Seamlessly connect Postgres, MySql and other data sources. Instant GraphQL: Get your API running quickly with automatic queries, mutations and mutations. One Command Import: Import an existing database using a simple command line tool.

SlashDB creates a REST API from relational databases, enabling users to read and write data in user-friendly formats such as XML, JSON, and CSV. Furthermore, it allows users to easily navigate through data using HTML, helping them to explore the available databases, tables, queries, and API endpoints. With the capability to serve as a central access point for multiple databases, SlashDB effectively establishes a comprehensive resource-oriented architecture (ROA) that functions as an API gateway for users seeking data access. Each database is provided with a web service shell that translates its relational structures into a coherent library of uniform resource locators (URLs). Adhering to REST principles, each data element is assigned a unique identifying URL, whether it consists of a simple scalar value or a complex nested structure of interrelated records. This functionality enhances data accessibility and organization, making it easier for developers to integrate and utilize varied data sources.

Amazon API Gateway is an entirely managed service designed to simplify the process for developers to create, publish, maintain, monitor, and secure APIs, regardless of scale. Serving as the "entrance" for applications, APIs facilitate access to data, business logic, or services from the backend. Through API Gateway, developers can build both RESTful and WebSocket APIs, which are essential for enabling real-time two-way communication in applications. This service supports both containerized and serverless environments as well as web applications. It efficiently manages the complexities of processing hundreds of thousands of simultaneous API requests, handling traffic management, CORS, authorization and access control, throttling, monitoring, and versioning. Moreover, there are no upfront fees or minimum charges associated with API Gateway; instead, you only pay for the API calls and data transfer you utilize. With a tiered pricing structure, as your API usage grows, you can benefit from reduced costs, making it a cost-effective solution for businesses of all sizes. Additionally, the simplicity and scalability of API Gateway allow developers to focus more on building features rather than managing infrastructure.

Ngrok serves as a versatile network edge solution that enhances your applications by integrating connectivity, security, and monitoring without requiring any modifications to your code. With ngrok, you can effortlessly add layers of security, scalability, and visibility to your applications, enabling you to securely expose your localhost to the internet. It facilitates the introspection and replay of requests, creating an efficient feedback loop. Additionally, ngrok allows seamless connections into customer networks, eliminating the need for cumbersome firewall configurations, VPN setups, or change requests. This makes ngrok the quickest method to launch your application online. Operating a globally distributed reverse proxy, it effectively manages your web services regardless of whether they are hosted in the cloud or secured behind firewalls. Furthermore, ngrok provides an intuitive interface that simplifies the entire process, making it accessible even for those with limited technical expertise.

Experience the leading API gateway in the world, designed specifically for hybrid and multi-cloud environments and optimized for microservices as well as distributed systems. Take the first step today by downloading Kong Gateway at no cost. This powerful tool not only supports hybrid and multi-cloud infrastructures but also features a Kubernetes-native ingress solution along with support for declarative configuration management. As part of the Konnect managed connectivity platform, Kong Gateway provides essential connectivity capabilities such as API Portals and AI-driven anomaly detection, all while allowing for high-performance connectivity runtimes. Enhance your setup with a variety of plugins created by Kong and the community, or develop your own using our comprehensive and user-friendly plugin development kit. You can configure the Gateway seamlessly through an API, a web-based interface, or with declarative configuration to facilitate updates within your CI/CD pipelines. With its robust features, Kong Gateway empowers users to create efficient and scalable API management solutions.

Mindware serves as an API gateway designed to link AI agents to the internet seamlessly. It eliminates the complexities of coding and configuring connections to various API services, thereby improving functionality, facilitating real-time data access, and streamlining workflows through the use of a single API key. Whether you're a hobbyist developer or deploying high-quality consumer AI agents, Mindware empowers you to engage with external APIs or execute specialized tasks that extend beyond mere text generation capabilities. This tool is ideal for anyone looking to enhance their AI solutions by integrating diverse services effortlessly.

APIPark serves as a comprehensive, open-source AI gateway and API developer portal designed to streamline the management, integration, and deployment of AI services for developers and businesses alike. Regardless of the AI model being utilized, APIPark offers a seamless integration experience. It consolidates all authentication management and monitors API call expenditures, ensuring a standardized data request format across various AI models. When changing AI models or tweaking prompts, your application or microservices remain unaffected, which enhances the overall ease of AI utilization while minimizing maintenance expenses. Developers can swiftly integrate different AI models and prompts into new APIs, enabling the creation of specialized services like sentiment analysis, translation, or data analytics by leveraging OpenAI GPT-4 and customized prompts. Furthermore, the platform’s API lifecycle management feature standardizes the handling of APIs, encompassing aspects such as traffic routing, load balancing, and version control for publicly available APIs, ultimately boosting the quality and maintainability of these APIs. This innovative approach not only facilitates a more efficient workflow but also empowers developers to innovate more rapidly in the AI space.

Free engineering teams from the burden of overseeing notification infrastructure while enabling product teams to take charge of notification workflows. Centralize the management of templates across all channels via a unified interface. Gain AI-driven insights into omni-channel messaging that can significantly enhance engagement. Oversee workflows and service providers without needing to modify the code. Dispatch high-volume notifications seamlessly without encountering scaling challenges. Collaborate effectively by managing channel-specific templates for every communication in a single location. Achieve full deliverability with intelligent routing mechanisms and failover protocols. Streamline the management of your integrations, templates, routes, and workflows in one central hub. Access real-time analytics, comprehensive reports, and actionable insights right out of the box. Fyno offers substantial value throughout your organization while consolidating logs from all communication channels and service providers. This eliminates the need to log into various platforms for information. With Fyno's in-app SDK, deploy a customizable notification center within your applications, tailored to align with your app's design. This powerful tool not only enhances communication but also fosters a more cohesive workflow across teams.

S4E:Shelter intuitively detects the technology you employ, streamlining security evaluations tailored to your application without requiring any technical know-how. This automated security assessment tool leverages machine learning to identify the tech stack of your assets along with their vulnerabilities, providing you with actionable recommendations for improvement. With S4E:Shelter, your security is consistently kept current. Meanwhile, S4E:Solidarity serves as an API gateway designed to simplify the cybersecurity integration process for applications, enabling developers to incorporate security measures seamlessly into their development workflows. In addition, S4E:Equality boasts a collection of over 500 complimentary cybersecurity assessment tools accessible to anyone seeking to identify security weaknesses according to their unique requirements. Lastly, S4E:Education offers a comprehensive security awareness training platform that utilizes quizzes and social engineering scenarios to enhance your understanding of essential cybersecurity principles. By utilizing these resources, individuals and organizations can significantly bolster their cybersecurity posture.

An all-encompassing API Lifecycle Management solution enables agile API development while facilitating easy monitoring of key performance indicators. It allows for true hybrid API development, whether in the cloud or on-premises, showcasing a modern and flexible design that incorporates the latest security measures. Rapid innovation can significantly enhance operational efficiency, ultimately boosting profitability. It is crucial to maintain the most current security policies to safeguard your data. By utilizing a unified integration tool, you can achieve seamless portability between cloud and on-premises deployments. Additionally, manage your cloud services effectively with specialized cloud tools that simplify administrative tasks such as backup, restoration, scaling up or down, and more. Full administrative control of the SOA server is accessible via a web-based console, while SSH access to virtual machines ensures secure and efficient management. This comprehensive approach to API management not only optimizes performance but also enhances the overall user experience.

Kusk serves as an Open Source API Gateway, enabling rapid development, monitoring, and deployment of APIs within minutes. It enhances your API processes by providing pre-configured mocked responses and validated requests, while also seamlessly integrating with your preferred GitOps workflows to automate API Gateway deployment. By adhering to the OpenAPI Standard, Kusk ensures a single source of truth for your API, eliminating the need for extra configuration files and simplifying the management process. This streamlined approach not only saves time but also enhances consistency and reliability across your API ecosystem.

Fusio is an open-source platform designed for API management, enabling users to create and oversee REST APIs effectively. With Fusio, you can swiftly develop a cutting-edge API, establish a dedicated developer portal, and explore monetization options for your API. The platform features an intuitive backend that facilitates comprehensive control and management of the entire API lifecycle. Additionally, Fusio includes a developer portal application that streamlines the setup of your API program, serving as a hub for developers to register and access your API. Out of the box, Fusio offers a variety of pre-built actions for a range of tasks, such as proxying HTTP requests to an internal API or generating an API from a database table. This functionality enables you to create APIs in a Low-Code manner, minimizing the need for complex coding. Furthermore, Fusio's Worker-System supports the development of actions in multiple programming languages, currently including Java, Javascript, PHP, and Python, allowing for versatility in API development. By leveraging these features, developers can efficiently bring their API ideas to life while maintaining flexibility in their coding preferences.