React native vs Xamarin help please :)

Hi everyone,

I am the owner of a startup company- we have an application with over 7 million downloads. We are looking to hire a development partner and have been told incredibly mixed information about React Native vs Xamarin. The app is currently in Xamarin. We've been pushed to move to REact because Xamarin is not as scaleable and more expensive to develop. Is this true? It's been really hard to get honest opinions as everyone is also selling their services (which of course, is fair enough) so any insight at all is appreciated. THANK YOU!!!