K6 allows users to load test the performance of their applications. This can be just an API or something larger like a javascript file. Their tools and integration partners allow for tests to be run nearly anywhere with a big emphasis on running javascript tests.
On top of being the tool that can automate the tests that K6 sets up, Testkube also gives the added benefit of giving a web dashboard to view all the tests. Finally, a spot for both the developers and the testers to quickly see how their load testing is going. All from the convenience from a web dashboard!