Teller (Teller.io) Supported Banks: 3+ Institutions (2026)

Teller is a banking API aggregator: one integration model so apps can reach many institutions with user consent. We list about 3 institutions in this directory; your app’s real coverage can still differ by product and market. For a simple mental model, Teller is like a power strip for financial data: many banks share one interface, and your product plugs in once.

What is Teller?

Teller is an open banking API aggregator that provides connectivity to financial institutions. Through Teller's platform, developers can integrate with 3+ banks and financial institutions through a single API integration.

API aggregators like Teller simplify the process of connecting to banks by providing:

Standardized API interfaces across multiple banks
Pre-built authentication flows
Data normalization and enrichment
Regulatory compliance handling

Learn more about how open banking APIs work in our [Open Banking API guide](/open-banking-api), or browse the bank coverage below to see which financial institutions are supported by Teller.

#Teller Supported Banks (3)

Showing 3 of 3 banks tracked

Name	APIs	View
Ally	-	View
FIRST REPUBLIC BANK	-	View
Simple	-	View

Teller FAQ

What is Teller?

Teller is an open banking API aggregator headquartered in GB. It provides account information (AIS), payment initiation (PIS) through a single integration, so apps can reach many banks with the customer's consent instead of building one connection per bank.

How many banks does Teller support?

Open Banking Tracker lists 3 institutions reachable through Teller. Real coverage can differ by product, market, and individual bank, so use the supported-banks table on this page and confirm specific institutions in Teller's own documentation.