Thunder Client
Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.
Similar Tools
Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.
Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration so you can create better APIs—faster.
Streamline your API testing, integration testing and test data management.
Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).
ReadyAPI is a low-code API testing platform for development teams that care about creating test automation across any workflow.
Real API Design-first Development Platform Design. Debug. Test. Document. Mock. Build APIs Faster & Together.
How are teams like yours balancing speed, quality, security, and AI in 2026? Download your copy and get real insights.
Join Testkube live. Real AI-driven testing. Real Kubernetes environments, real answers. May 21, 1pm ET.
Manage your entire QA lifecycle in one place. Sync Jira, automate scripts, and use AI to accelerate your testing.
With servers in >250 cities around the world, check your site for localization problems, broken GDPR banners, etc.