Thunder Client
Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.
Similar Tools
ReadyAPI is a low-code API testing platform for development teams that care about creating test automation across any workflow.
Selenium automates browsers. That's it! What you do with that power is entirely up to you.
Real API Design-first Development Platform Design. Debug. Test. Document. Mock. Build APIs Faster & Together.
Jest is a delightful JavaScript Testing Framework with a focus on simplicity.
Browser and Mobile Automation Test Framework for Node.js
Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.
Create, run, and maintain web and mobile tests with no-code, AI-driven automation in the cloud
Complete the Sembi Quality Ops Survey for a chance to win $100—and have your voice heard in our upcoming industry report
Create E2E tests visually. Get clear, readable YAML you can actually maintain.
Kick off 2026 with an honest look at where AI really helps software testing teams.