Small savings accounts at your local post office used to be a thing in the US, back in the days when banks mostly catered to wealthy urban customers, and seems to have done elsewhere too:

<https://en.wikipedia.org/wiki/United_States_Postal_Savings_S...> <https://en.wikipedia.org/wiki/Postal_savings_system>

Seeing the high fees that some banks charge, I'd love to see USPS savings accounts come back as some low-fee competition.