Sector Spotlight: Core Banking Systems — First Generation
August 19, 2025
By: Paul Schaus And Kate Drew
This is the final installment in a four-part series that covers the four generations of core banking systems. For more information on how these generations are defined and their history, read our commentary here.
The first generation of core banking systems represent the first modern computerized core banking systems. The systems are built on legacy languages such as COBOL, RPG, or Progress OpenEdge but support modern integrations via application programming interfaces (APIs) (e.g., REST, SOAP, JSON/XML) and/or Service Oriented Architecture (SOA), allowing extensions in languages like Java, .NET, or JavaScript.
What’s going on in core banking systems — first generation
First generation core banking systems came to market beginning in the late 1960s. They’ve experienced many iterations in their long history, including updates to improve the frontend experience and streamlined integration through APIs. A defining feature of these systems is that they operate in batch-processing mode, not in real time, with few exceptions designed for savings institutions and credit unions. Today, first generation systems tend to be attractive to financial institutions that prioritize stability, reliability, and security.
First generation core banking systems vendor snapshot
The first generation core banking system space includes mostly established US vendors. A bank’s choice of system will depend on its business and functional requirements.
Here’s a snapshot of first generation core banking systems. The list is representative; today there are over 50 first generation cores supported in the US:
What to look for in first generation core banking systems
First generation core banking systems represent traditional, established approaches to core development. Capabilities are foundational and proven.
Each generation of core banking system offers its own unique strengths and tradeoffs, as does each system within each generation. As a bank contemplates its options, a clear understanding of its requirements and how those requirements align with its overall strategy are key to mapping the right attributes to the bank’s needs.
Note: Fiserv in the past year announced plans to consolidate legacy cores — Premier with others (e.g., Precision, Cleartouch) into next-generation platforms, driven by cloud and digital trends. CCG Catalyst will withhold further commentary on long-term implications until tangible results from these implementations are observed.
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