Stronghold is a San Francisco-based financial infrastructure company providing pay-by-bank payment services to businesses across the United States. It focuses on legally operating businesses that may face difficulties accessing traditional banking services, particularly in cash-intensive sectors.

These businesses often face barriers because banks must assess licences, identities, transactions and payment risks on an individual basis. When digital payment services are unavailable, merchants remain dependent on cash, while consumers, banks and public authorities have less visibility over transactions.

Stronghold addresses this challenge by managing the compliance and verification processes across its network of merchants, partner banks and payment platforms. It verifies business licences, monitors expiration dates and transactions, confirms consumer identities and shares evidence with partner banks. Its multi-bank model also reduces dependence on any single financial institution.

The company uses AI to assist with onboarding reviews, monitoring, audit preparation and bank inquiries, while people retain responsibility for decisions and approvals. Stronghold has completed two consecutive independent Nacha audits without findings and resolved most merchant support requests within one day. The case illustrates how transparent compliance systems, shared evidence and distributed banking relationships can support more resilient participation in digital payments.