List of the Top 11 API Testing Tools for Postman in 2025

Designed for optimal performance and effective resource management, KrakenD is capable of handling an impressive 70,000 requests per second with just a single instance. Its stateless architecture promotes effortless scalability, eliminating the challenges associated with database maintenance or node synchronization. When it comes to features, KrakenD excels as a versatile solution. It supports a variety of protocols and API specifications, providing detailed access control, data transformation, and caching options. An exceptional aspect of its functionality is the Backend For Frontend pattern, which harmonizes multiple API requests into a unified response, thereby enhancing the client experience. On the security side, KrakenD adheres to OWASP standards and is agnostic to data types, facilitating compliance with various regulations. Its user-friendly nature is bolstered by a declarative configuration and seamless integration with third-party tools. Furthermore, with its community-driven open-source edition and clear pricing structure, KrakenD stands out as the preferred API Gateway for enterprises that prioritize both performance and scalability without compromise, making it a vital asset in today's digital landscape.

Parasoft aims to deliver automated testing tools and knowledge that enable companies to accelerate the launch of secure and dependable software. Parasoft C/C++test serves as a comprehensive test automation platform for C and C++, offering capabilities for static analysis, unit testing, and structural code coverage, thereby assisting organizations in meeting stringent industry standards for functional safety and security in embedded software applications. This robust solution not only enhances code quality but also streamlines the development process, ensuring that software is both effective and compliant with necessary regulations.

It's clear that enhancing your testing efforts could help identify bugs sooner, yet effective QA testing often demands significant time, effort, and resources. With MuukTest, engineering teams can achieve up to 95% coverage of end-to-end tests in a mere three months. Our team of QA specialists is dedicated to creating, overseeing, maintaining, and updating E2E tests on the MuukTest Platform for your web, API, and mobile applications with unparalleled speed. After reaching 100% regression coverage within just eight weeks, we initiate exploratory and negative testing to discover bugs and further elevate your testing coverage. By managing your testing frameworks, scripts, libraries, and maintenance, we significantly reduce the time you spend on development. Additionally, we take a proactive approach to identify flaky tests and false results, ensuring that your testing process remains accurate. Consistently conducting early and frequent tests enables you to catch errors during the initial phases of the development lifecycle, thus minimizing the burden of technical debt in the future. By streamlining your testing processes, you can improve overall product quality and enhance team productivity.

Experience a cohesive testing journey that encompasses diverse test categories. With our platform, you can apply the same testing scripts whether you're evaluating a web application across a variety of browsers, operating systems, and devices, verifying your APIs' functionality, or performing comprehensive load testing. Our enterprise-ready SaaS solution, provided by Testable and hosted in the cloud, allows you to run tests either in the cloud environment or on-premises using your favorite open-source tools, all while we take care of the test execution, offer real-time reporting, conduct in-depth analysis, and ensure secure cloud storage. Moreover, you can opt to deploy our testing platform on your own infrastructure, safely shielded behind your firewall. With advanced, scalable, and adaptable packaging options—including a user-friendly one-click Kubernetes Helm package—you can conduct functional tests across multiple browsers, operating systems, and devices simultaneously. In addition, you will receive a real-time report featuring live interactive sessions, videos for every virtual user, screenshots, assertions, performance metrics, trend analysis, and a plethora of other insights aimed at refining your testing approach. This all-encompassing strategy guarantees that you possess all the essential tools to elevate your testing initiatives efficiently, ultimately leading to improved software quality.

Akto is a rapid, open-source API security platform that enables users to set up in just one minute. Security teams utilize Akto to keep an ongoing inventory of APIs, assess them for vulnerabilities, and identify issues during runtime. The platform includes tests for all categories from the OWASP Top 10 and HackerOne Top 10, such as Broken Object Level Authorization (BOLA), authentication flaws, Server-Side Request Forgery (SSRF), Cross-Site Scripting (XSS), and various security configurations. With its robust testing engine, Akto conducts a range of business logic tests by analyzing traffic data to discern API usage patterns, effectively minimizing false positives. Additionally, Akto supports integration with a variety of traffic sources, including Burpsuite, AWS, Postman, GCP, and various gateways, enhancing its usability across different environments. This adaptability makes Akto a valuable tool for ensuring the security of APIs in diverse operational settings.

Testfully provides a wide range of features, including a powerful API client and advanced testing and monitoring tools. Users benefit from flexible storage options, both in the cloud and offline, which facilitate smooth collaboration among teams and enable easy migration, all through a single, comprehensive multi-platform solution. The platform enhances the process of moving data from Postman or Insomnia for effortless integration into Testfully. With an emphasis on adaptability and security, it allows users to define global, environment, and folder variables that can be customized for specific workspaces or individual accounts. Furthermore, users have the ability to tailor authentication methods, parameters, headers, and body content easily, making it simple to craft any HTTP request. Team collaboration is seamless as members can be invited, assigned distinct roles, and folder permissions can be effectively managed. Testfully accommodates major authorization protocols like OAuth2, providing secure access management capabilities. This makes it suitable for users tackling both simple tasks and complex scenarios, as the tool simplifies the testing process without necessitating any programming knowledge, making sophisticated API testing more accessible and user-friendly. Users also have the option to execute requests in a folder simultaneously, sequentially, or in random order with just one click, which significantly boosts efficiency. In addition, it supports response validation and contract testing using a declarative format, further reducing the need for coding and enhancing the overall testing experience. Ultimately, Testfully is crafted to serve both beginners and seasoned professionals, ensuring that all users can effectively harness its powerful features. Moreover, its intuitive interface allows for a quick learning curve, making it easier for newcomers to get started.

To ensure that your applications run efficiently and maintain superior quality, it's crucial to replicate real-world traffic scenarios during testing. By closely monitoring code performance, you can swiftly pinpoint problems and assure that your application functions optimally before it goes live. Crafting realistic testing environments, performing load tests, and designing intricate simulations of both external and internal backend systems will significantly improve your readiness for production. This approach eliminates the need to create costly new environments for every test, and the integrated autoscaling feature further minimizes cloud costs. You can avoid the hassle of cumbersome, custom frameworks and labor-intensive manual testing scripts, allowing you to release more code in a shorter timeframe. Rest assured that your updates can handle heavy traffic without issues, thus preventing major outages, meeting service level agreements, and ensuring user satisfaction. By effectively mimicking both external systems and internal infrastructures, you achieve testing that is both reliable and economical. There's no longer a requirement to invest in expensive, all-encompassing environments that demand extensive setup times. Transitioning away from outdated systems becomes effortless, guaranteeing a smooth experience for your customers. With these innovative strategies, your application can improve its resilience and performance under a variety of conditions, ultimately leading to a superior product. Additionally, this streamlining of processes allows for a more agile development cycle, empowering teams to innovate and adapt rapidly to changing market demands.

Pynt is a cutting-edge API Security Testing Platform that unveils authenticated API vulnerabilities through simulated attacks. We assist numerous organizations, such as Telefonica, Sage, and Halodoc, in consistently monitoring, classifying, and preemptively addressing inadequately secured APIs before malicious hackers can exploit them. Leveraging a distinctive hacking methodology and an integrated shift-left approach, Pynt employs proprietary attack scenarios to identify genuine threats. In addition, it facilitates the discovery of APIs and provides recommendations for rectifying confirmed vulnerabilities. With the trust of thousands of businesses, Pynt plays a crucial role in safeguarding their applications. Many companies incorporate Pynt into their application security strategies to ensure robust protection against potential threats. This reliance on Pynt underscores its importance in the ever-evolving landscape of API security.

Hoppscotch streamlines the creation and testing of APIs, allowing for faster product launches and enhanced efficiency. You can build APIs rapidly, perform instant tests, and automatically document and share your projects with ease. Whether you're working on initial prototypes or preparing for final production, everything you need for smooth API development is conveniently provided by Hoppscotch, eliminating the need to switch between multiple tabs. The platform allows for the establishment of dedicated workspaces tailored for your teams, offering customizable access controls as necessary. Real-time collaboration with colleagues is facilitated, leading to improved teamwork and productivity. Additionally, you have the option to deploy Hoppscotch on your own servers, providing you with greater flexibility and control. Organizing requests into collections or folders makes it easy to share with team members, while managing environment variables ensures consistency throughout your projects. You can also maintain a comprehensive record of your request history for quick reference. With the ability to modify headers, authenticate requests, generate random data, and explore an array of other features, thorough API testing is easily achievable, including writing assertions to verify responses. Hoppscotch accommodates over 30 languages, making it accessible in your preferred language. You can monitor all activities within your workspace, noting who performed actions and when, enhancing accountability. The integration of your existing SSO provider simplifies login processes, allowing for efficient user, workspace, and resource management. Moreover, the platform’s user-friendly interface ensures that both beginners and seasoned developers can navigate it without difficulty, making API development a more enjoyable experience overall. This comprehensive suite of features, combined with its adaptability, truly makes Hoppscotch a valuable tool for any development team.

Transform your Postman collection into detailed test suites that integrate effortlessly with your CI/CD pipeline. By simply sharing a link to your Postman collection, you can efficiently create comprehensive test suites. You can also interact with Kusho AI by providing essential API information for manual prompts. This tool is designed to fit seamlessly into your development workflow and automatically refreshes as necessary. In the current landscape where software teams operate at a rapid pace, multitasking has become vital, yet crafting test cases can take up valuable time that developers could allocate to other important activities. At KushoAI, we are developing a pioneering AI agent aimed at easing the API testing workload for developers, allowing them to focus on their primary skills and leading to more streamlined product launches than ever before. You can generate extensive test suites for every API, which ultimately conserves precious hours of manual labor. The system is customizable to meet your organization’s unique requirements; simply provide additional prompts in everyday language to receive test code in seconds. KushoAI skillfully understands your natural language requests and produces test case code without delay. Moreover, KushoAI can automatically run relevant test suites at any stage of your CI/CD pipeline, guaranteeing that your testing process remains both efficient and effective. Embrace a future where developers enhance their productivity with the support of intelligent tools like KushoAI, ensuring thorough and prompt testing. This innovative approach not only streamlines the testing process but also empowers teams to deliver high-quality software at an unprecedented pace.

Enhance your testing processes with Stellar’s innovative low-code automation platform. Increase efficiency, minimize errors, and achieve smarter software testing with integrated solutions for UI, API, mobile, performance, and accessibility evaluations. Empower your team to perform additional tests with reduced pressure, all due to seamless integration and advanced analytical tools. By utilizing Stellar, you can revolutionize your testing strategy and discover unprecedented levels of productivity, leading to a more streamlined development cycle. Embrace this opportunity to elevate your software quality and team performance simultaneously.