Also, Brex isn't a bank. They make this very clear: https://www.brex.com/support/is-brex-cash-a-bank-account
You should read carefully for anything where you put your hard-earned money.
"Brex Cash is not a bank account; it is a cash management account offered by Brex Treasury (a FINRA-registered broker-dealer) that functions very much like a business bank account.
You can use your Brex Cash account to securely deposit checks (including via mobile app); send and receive payments via ACH, check, and wire—even internationally; and manage spend for your company’s different users.
Brex Cash also allows you to choose how your money is stored. You can elect to keep your deposits at a Brex partner bank, and if you do, you’ll be eligible for FDIC insurance up to $2,250,000 in total. The other option is to invest your deposits into a government money market mutual fund. You can also use any combination of these two options.
No matter how you choose to store your funds, your Brex account gives you unlimited corporate credit cards for secure, convenient spending. The cards are automatically paid daily like a debit card—while giving you cash back on every purchase and building your business credit.
Note: Unlike debit cards, Brex cards cannot be used to make cash deposits or ATM withdrawals."
Your FDIC insurance and exposure is entirely up to you at Brex.
