In the past I’ve always used Postman when I wanted to test out a server API. I liked it but didn’t love it. However, the commercial client Insomnia REST Client is now open source and I recently downloaded it to check it out. I’m just beginning to scratch the surface so I’m not sure I can say that it’s better than Postman but it certainly has a really large number of features that I’d like to try out. There are still an array of things you might pay for but clearly there are some powerhouse tools looking to fight it out in this part of the developer tool space.