JSYK, Venmo and Paypal support a Visa+ Payname (configure it in each app). The Visa+ Payname thing is Visa's attempt to allow cross-app payments but AFAICT only Paypal and Venmo support it....

But if you ever need to send money to a Venmo account from Paypal, or receive money from a Venmo account in Paypal, you can do so with the Visa+ Payname.

I have some friends who are unbanked and banned from a lot of apps, this little work around has saved a few on occasion.