SoapUI Open Source

Good for simple requests, simple scripts, assertions, and small workflows. Also not bad with the Open Source version if savvy with code as you can do a lot with custom functionality.Free version has limited compatibility with scripts/projects created from the Pro version, but functionality-wise can probably be made up with coding. As such, the free version may not be too suitable for complex scripts or for those who are not familiar with coding as functionality/usability may be limited.

Even if there are 2 versions of SoapUI, the free version of SoapUI is very complete.

When you need to test a specific API (SOAP or REST), it is very useful and simple to use.
You can save several projects in SoapUI, so you can access multiple API directly from your SoapUI tool. For example, we are using it for our several environments : (stagging, quality, production, development). So with several projects, we can access several projects / API.

SoapUI, in the free version, does not provide any way to work as a team, you need to send manually the project if you want to share them.

I recommend it to those developers who have extensive experience in web services because at the beginning it is not usually easy to get up to speed due to the degree of difficulty of the interface and its functions. But in general, once you have mastered its basic functions, it is almost impossible not to stop using it.

It's best for API testing and functional testing of code. It also supports Swagger and I think ramp formats. UI improvement is needed. Some of my colleagues are also saying that UI should be nice or, if possible, should be browser bases.

Easy to install with a great interface. We just need to put the WSDL URL and it shows us all the methods present in the WSDL location. We only need to submit the variables and send them and it shows the output in split screen with success or error.