"Esta aplicación usa Plaid para conectar su banco"
This is missing a connector like:
"Esta aplicación usa Plaid para conectar a su banco"
Or change the whole sentence:
"Plaid se conecta a su banco con esta aplicación"
"Plaid se quiere a vincular a su banco" (if "Plaid" and "this application" are the same)
And of course, everything still sounds way too formal and old-school. Looking at the English site, it's clear it wants to transmit a young startup vibe. But the Spanish version sounds like an old boring bank app more than a young useful one. Either it's been translated by non-natives, or translated very individual sentences without context, or by someone in Latin-America (the Spanish over South America in general is a lot more formal sounding for Spaniards).