It definitely may be the same designer; who knows. It's just pretty strange that so many of the design elements of Stripe are 100% reflected on this companies page.
Stripe's design is beautiful and if be happy if more people imitated or copied them :)
I definitely agree that Stripe's design is beautiful, but this is just too close for me. I think it would be awesome if they built upon Stripes beautiful interface and built something nicely different!