Best On-Premises API Testing Tools 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.

It works: Codeless testing Give your entire team the ability to create and maintain automated tests. Not just developers. Meet your testing demands fast. You can get full coverage of your tests in days and not months. Our natural-language tests are very resistant to code changes. Our AI will quickly repair any test failures. Continuous Testing is a key component of Agile/DevOps. Push features to production in the same day. Boozang supports the following test approaches: - Codeless Record/Replay interface - BDD / Cucumber - API testing - Model-based testing - HTML Canvas testing The following features makes your testing a breeze - In-browser console debugging - Screenshots to show where test fails - Integrate to any CI server - Test with unlimited parallel workers to speed up tests - Root-cause analysis reports - Trend reports to track failures and performance over time - Test management integration (Xray / Jira)

Parasoft's mission is to provide automated testing solutions and expertise that empower organizations to expedite delivery of safe and reliable software. A powerful unified C and C++ test automation solution for static analysis, unit testing and structural code coverage, Parasoft C/C++test helps satisfy compliance with industry functional safety and security requirements for embedded software systems.

Testsigma is a low-code end-to-end test automation platform for Agile teams. It lets SDETs, manual testers, SMEs, and QAs collaboratively plan, develop, execute, analyze, debug, and report on their automated testing for websites, native Android and iOS apps, and APIs. It is available as a fully managed, cloud-based solution as well as a self-hosted instance that is open source (Testsigma Community Edition). The platform is built with Java, but the automated tests are code-agnostic. Through built-in NLP Grammar, teams can automate user actions in simple English, or generate airtight test scripts with the Test Recorder. With features like built-in visual testing, parametrized or data-driven testing, 2FA testing, and an AI that automatically fixes unstable elements and test steps, identifies and isolates regression-affected scripts, and provides suggestions to help you find and fix test failures, Testsigma can replace tens of different tools in the QA toolchain to enable teams to test easily, continuously, and collaboratively.

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.

You can use your favorite debugging software to locally troubleshoot your Kubernetes services. Telepresence, an open-source tool, allows you to run one service locally and connect it to a remote Kubernetes cluster. Telepresence was initially developed by Ambassador Labs, which creates open-source development tools for Kubernetes such as Ambassador and Forge. We welcome all contributions from the community. You can help us by submitting an issue, pull request or reporting a bug. Join our active Slack group to ask questions or inquire about paid support plans. Telepresence is currently under active development. Register to receive updates and announcements. You can quickly debug locally without waiting for a container to be built/push/deployed. Ability to use their favorite local tools such as debugger, IDE, etc. Ability to run large-scale programs that aren't possible locally.

ACCELQ is an AI-powered, no-code test automation and management on a cloud-native platform. It offers a unified solution for web, mobile, API, database, and packaged apps. With automation-first, codeless capabilities, testing teams can easily use it without technical or programming expertise. ACCELQ enables businesses to achieve 3x productivity and over 70% cost savings through its pioneering autonomics-based automation platform. Recognized as a leader in The Forrester Wave™: Continuous Automation Testing Platforms, Q4 2022, ACCELQ stands out in the industry.

Akto is an open source, instant API security platform that takes only 60 secs to get started. Akto is used by security teams to maintain a continuous inventory of APIs, test APIs for vulnerabilities and find runtime issues. Akto offers tests for all OWASP top 10 and HackerOne Top 10 categories including BOLA, authentication, SSRF, XSS, security configurations, etc. Akto's powerful testing engine runs variety of business logic tests by reading traffic data to understand API traffic pattern leading to reduced false positives. Akto can integrate with multiple traffic sources - Burpsuite, AWS, postman, GCP, gateways, etc.

Pynt, an innovative API Security Testing Platform, exposes verified API threats by simulating attacks. We help hundreds companies, including Telefonica, Sage and Halodoc to continuously monitor, categorize and attack poorly secured APIs before hackers do. Pynt’s uses a unique hacking technology and an integrated shift-left strategy, using home-grown attack scenario, to detect real threats. It also helps to discover APIs and suggest fixes for verified vulnerabilities. Pynt is trusted by thousands of companies to protect the No. As part of their AppSec strategies, a number of companies rely on Pynt to secure the no.

Appvance IQ (AIQ), delivers transformative productivity gains and lower costs for both test creation and execution. It offers both AI-driven (fully automated tests) and 3rd-generation codeless scripting for test creation. These scripts are then executed using data-driven functional and performance, app-pen, and API testing -- both for web and mobile apps. AIQ's self healing technology allows you to cover all code with only 10% of the effort required by traditional testing systems. AIQ detects important bugs automatically and with minimal effort. No programming, scripting, logs, or recording are required. AIQ can be easily integrated with your existing DevOps tools, processes, and tools.

TestEngine serves as a highly efficient platform designed for the automated execution of SoapUI and ReadyAPI tests on a large scale. It offers versatile deployment options, enabling installation across various environments, including cloud solutions or on-premises setups, utilizing Docker, virtual machines, or operating systems like Mac, Linux, and Windows, thus accommodating both centralized and distributed execution models. By leveraging TestEngine, teams can significantly speed up their delivery pipelines through concurrent test execution. This tool is capable of running extensive test suites in conjunction with shorter, spontaneous test cases, all while requiring minimal infrastructure upkeep. TestEngine effectively manages the queuing of test requests as they come in, even during peak submission times. As demand varies, it returns results to users on distributed clients and retains data for future access. The importance of robust testing cannot be overstated, as it is crucial for delivering and maintaining high-quality applications and services. With TestEngine, teams can enhance their testing processes and streamline execution without the challenges typically associated with complex environments, leading to increased productivity and efficiency in software development.

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!

AutoStub® serves as a vital resource for accelerating the API development process. By enabling rapid design, prototyping, documentation, and testing of APIs, it can greatly minimize build times. This tool generates a working mock that empowers developers to engage with APIs even before their complete implementation. It is offered as a SaaS solution, available for onsite installations, and can also be utilized in a hybrid configuration. Notable Features - Ability to simulate both ReST and SOAP services - Accepts Swagger files for ReST and WSDL files for SOAP services as input formats - Supports various methods such as GET, POST, PUT, and DELETE for ReST APIs - Facilitates the creation of mock services based on WSDL/Swagger 2.0, along with generating placeholder data for API testing - Provides an endpoint URL compatible with third-party SOAP client tools - Enhances quality assurance by allowing for comprehensive functional testing - Capable of managing multiple test scenarios simultaneously, ensuring a more streamlined development experience.

Continuous API testing and monitoring can be improved to unify functional, integration, load, and performance testing across internal, partner and third-party APIs. Test REST, SOAP and GraphQL. Web Services, Microservices, and Microservices. Automate tests as part a CI pipeline. Continuously monitor internal APIs. Available via Hosted Cloud, Self–Hosted Cloud, and Hybrid. Continuous API quality is more than just a competitive advantage for many innovative companies. It's the new norm. API Fortress helps any company simplify continuous API quality. It allows developers and testers to significantly accelerate time to market without increasing risk. Create your first test in seconds using a payload, specification file or recorded API traffic. Edit your tests in your IDE, the downloadable IDE Forge or the easy drag-and-drop GUI. All tests can be edited in your existing workflow without any difficulty.