Both deal with API requests, both sit somewhere in the development flow, and both are useful. But putting them in the same box is a bit like comparing a screwdriver with a crash test. Yes, both are involved in building things. No, they are not doing the same job.

Thunder Client lives exactly where developers spend most of their time — inside the editor. You write some code, tweak an endpoint, open Thunder Client, send a request, get a response, fix something, repeat. It is fast, lightweight, and does not force you to jump between tools like a caffeinated squirrel. For day-to-day development, that convenience matters more than people like to admit.

But here is the part everyone quietly skips. You send a request, it returns 200, JSON looks fine, and someone inevitably says “works.” Which is technically correct, in the same way that starting a car proves it can move forward.…