Cogni - People-driven digital banking app designed w/ you in mind.
Hack Club Bank - Non-profit bank account for high school hackathons
Business Banking APIs by Decentro - Perform any banking functions on top of corporate accounts
Square Banking - Your payments, banking, and cash flow. Working as one.
bunq API - Public banking API
Plaid in the UK - The easiest way for users to connect their banks to an app