Only nitpick is when my co-founders linked their bank accounts to Mercury to transfer money, Mercury displayed their personal account balances (after unlinking their accounts, their personal balances no longer showed up). I had to wire transfer since Plaid didn't work for my bank.
Leaking information about a personal account when it has only been used authorized for the purposes of transfer seems to be a P0 bug to me, from a disinterested third-party point of view. If I authorize a transfer of $10k to my startup and for some reason my co-founder is able to see that my personal account balance at Bank of America is $400k, that sounds like...a massive leak of information that I didn't authorize.
Or do I have a mistaken view of what the problem is?
Most people transfer money from personal account via another means (checks, wire etc). Though agreed that it's bad when a personal account is used and the balance is leaked to cofounders.
We also experienced the personal balance privacy issue where we didn't expect to see each other's balances but was too late by then.