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Open Banking: Buzzword or Added Value?

Eraneos Group Blog Open Banking: Buzzword or Added Value?

The introduction of Open Banking gives clients of European banks unprecedented control over their own data and its use for economic purposes. Customers can determine with whom they want to share their financial data and thus also use it to their own advantage. But what is so revolutionary about providing personal bank data?

“Data is the new oil,” as the Economist aptly described it in 2017. That customer data does not belong to the banks, but to their customers, is a fundamental premise that now prevails and could uproot the finance landscape enormously.

What does Open Banking mean?

Current technologies enable collaboration between traditional banks and other providers, e.g., Fintechs, through the exchange of information and data via APIs (application programming interfaces). The term API has its origin in the software sector and refers to an interface that enables the transfer of data and communication between originally separate systems. In the financial industry, development in Europe was accelerated by the introduction of the Revised Payment Services Directive (PSD2) in 2016. The regulatory framework requires European banks to disclose APIs and make them accessible to other service providers. The aim of this requirementab is to strengthen competition and the user experience. In Switzerland, this goal is being driven forward by various interest groups, with the most prominent example being the central platform model, b.Link SIX. Here, third-party providers and banks are covered simultaneously with a single connection. The standardization of API specifications and contracts stands out as an advantage.

What added value does Open Banking generate for service providers?

Simplified access for third-party providers enables data-driven innovation. Companies in the real estate market serve as an example. By analyzing vast amounts of data, platforms can help customers find the perfect new home based on the user’s payment habits. Preferences, such as where a customer shops on a weekly basis, could help to find a suitable apartment, e.g., near that store. Data based on financial behavior allows providers to identify the lifestyle and expectation of customers and to monetize these insights. It is possible to derive a variety of assumptions from the correct categorization of a customer. Has the customer taken out a student loan? Is the customer repaying a mortgage? Answering such questions allows predictions that, e.g., the student will look for lower-cost solutions. Data extraction from Open Banking APIs allows marketers to approach their customers even more specifically and increase their conversion rate through more relevant advertisements. In this sense, we can safely regard the databases of financial service providers as oil fields, and tapping these fields can be economically enormously profitable.

Eraneos Group API
What hurdles are there to overcome?

Despite the promising prospects offered by Open Banking, it is not easy to establish. On the technical side, it must be guaranteed that the APIs will work properly. Since no uniform ecosystem has been created yet, the service quality of banks can vary. This risk means that companies constantly have a business default risk because of APIs that do not respond. In November 2020, for example, there were more than 5.7 million unsuccessful API calls in the United Kingdom (according to statistics from the Open Banking Implementation Entity). This unreliability must first be overcome before Open Banking can really take off.


From a regulatory point of view, ensuring data protection plays an overriding role. Adrian Anderegg illustrates what there is to consider in this regard and what risks and responsibilities exist in creating data value in a separate blog post by ”Data the new gold” on the basis of concrete use cases. Cybercrime is a threat to every bank these days, and no less to Open Banking. Regulators must therefore consider how laws are drafted and where the limits of liability should be drawn. This could be solved, among other things, through a rigorous approval process for third-party providers. Due to the rapidly developing technology, however, the legislation must be designed with the necessary leeway so that it does not have to be constantly revised. The current speed of technological development means that regulators often lag behind the innovation curve.

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Added value

Open Banking, therefore, has the potential to provide enormous added value for customers if the necessary foundations have been laid. As long as these have not yet solidified, it will probably be a while before a sharp increase in innovations in this area can be expected.


In a following post, we will describe APIs in more detail using a framework that illustrates the versatile aspects of Open Banking. The goal is to create a holistic and technical overview of API management.

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