Excire shipped me something which allowed me to get an impression of how an integration could work. But this was only a quick shot, nothing I could really use for development.
Then there was a pause of several weeks, and yesterday evening they've sent me another thing to look at. But this version only works with Microsoft Visual Studio 2017. IMatch is created with Visual Studio 2015 (because I always wait for several months after a new version of VS comes out before I even install it). I will need to install Visual Studio 2017, rewrite my test suite and then test the Excire module again.
My initial results were promising for parts of my test suite. Not for all images, but Excire is enhanced all the time.
I'm also looking into the services provided by Microsoft and Google, which are both excellent and sometimes even astonishing.