The problem
Most businesses are reviewed in more than one place, and almost none of them show it. Google here, a marketplace there, Facebook where the regulars are — and a website that displays none of it, or displays one platform and ignores the rest.
Running two widgets from two vendors on the same page is the common workaround and it always looks like two products bolted together.
What actually works
One widget takes up to 100 sources from 71 platforms. Source tabs let a visitor filter if that is useful, and the overall rating reflects everything connected.
Sources can be mixed freely: several Google locations, a marketplace, a booking platform and a handful of testimonials you added by hand, all in one consistent block.