This is pathetic and I could imagine how you would feel to see your efforts being copied by a bunch of idiots and trying to make a living by fooling clients. Do you think they’ll succeed? I doubt? They can copy your UI and UX but they can’t copy the passion you guys have in creating products. I myself experienced similar incidents in the past (not with software though) and I can’t even find those who were trying to copy my creations today. They have gone bust. Its going to be the same here as well and take my word for it.

Btw I think you should consider editing the below,

“Invoiceable was co-founded by Stu Green and Hamlesh Motah, both who claim to be serial entrepreneurs, and seemingly intelligent people. Invoicely, the new incarnation of Invoiceable, seems to be from Apilayer, an Austrian company with a good range of products.”

I don’t see any good in their other products either. For instance the Apilayer’s website reminds me of the previous website of Stripe payments if I remember correct. They have copied it from there right?