Citi first introduced Citi Developer Portal in November 2016. This launch marked a significant step in Citi's transition to an open banking architecture, aiming to foster collaboration with developers and fintech partners. However, over time, it was clear that integration with traditional banking systems was too complex, time consuming, and expensive. In response to client demands for simplification, Citi launched a new unified API and integration experience, Citi Developer Portal, delivering innovation across client experience, operational efficiency, and business impact, earning the bank the 2025 Celent Model Bank Award for Corporate Integration.

Citi’s Developer Portal initiative highlights the importance of adopting a client-first approach, designing solutions based on how clients experience Citi as a single entity, rather than developing within traditional product silos. It also demonstrates the bank’s commitment to delivering a world class developer experience while helping clients accelerate time-to-value with scalable, more secure, and user-friendly integration options. By combining self-service design, embedded certificate provisioning, pre-built integrations, and a solution-oriented marketplace, the portal sets a high standard for enterprise API platforms in the financial industry and demonstrates a clear understanding of client pain points.

A highlight reel of Citi's initiative, along with a one-page overview are available to everyone. A full-length case study report diving into this initiative is only available to Celent's subscribers. Please log in to access this report.