Compare the Top API Testing Tools as of April 2025

What are API Testing Tools?

API testing software is used to test and validate the functionality, performance, security, and reliability of Application Programming Interfaces (APIs). These tools help ensure that APIs perform as expected under various conditions and meet the required business and technical requirements. Features typically include automated testing, request/response validation, load testing, security testing (e.g., for vulnerabilities and authentication), and performance testing. API testing software often supports integration with continuous integration/continuous deployment (CI/CD) pipelines to facilitate automated testing as part of the software development lifecycle. Compare and read user reviews of the best API Testing tools currently available using the table below. This list is updated regularly.

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    Global App Testing

    Global App Testing

    Global App Testing

    Global App Testing (GAT) enables tech teams to conduct testing across 189+ countries with a network of over 60,000 professional testers, using real devices and environments. By leveraging the GAT platform, you can streamline your testing process, boost release quality, and accelerate time-to-market while optimizing budget efficiency. The platform is fully integrated to seamlessly work with your existing DevOps or CI/CD tools. Whether you need ongoing QA support or additional resources to manage peak release cycles, GAT’s integration-driven approach allows you to manage your entire testing workflow—from test initiation to results analysis—without leaving your familiar tools like GitHub, Jira, and TestRail. With our integrated platform, both unscripted exploratory testing and scripted functional test execution can be embedded into your CI/CD and SDLC processes, ensuring perfect alignment with your automation testing tools.
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  • 2
    Leapwork

    Leapwork

    Leapwork

    Leapwork has created the world’s most accessible automation platform. Through a visual, no-code approach, Leapwork makes it easy for business and IT users to automate repetitive processes, so enterprises can adopt and scale automation faster. Leapwork is used by more than 400 global enterprises across all industries, from banks and insurance companies to life science, government and aerospace. Clients include NASA, PayPal, BNP Paribas and Daimler. The company is headquartered in Copenhagen, Denmark, and has local offices across Europe, US and Asia.
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