Salesforce has launched a 'headless product,' repackaging its APIs to cater to the emerging Agent era, where user interfaces (UIs) are becoming obsolete. This shift raises questions about the valuation of traditional SaaS companies, which have historically relied on UIs to maintain user engagement and data consistency. As agents bypass UIs to directly access data, the focus shifts to the data layer, compliance, and operational logic as new moats for these companies. In the AI-driven landscape, the defensibility of SaaS companies is evolving. While UIs once drove software stickiness, the emphasis is now on data models, permissions, and compliance. Agents require clear rules and process definitions, making operational logic more critical. The challenge for SaaS companies is to adapt to this new reality, where the value lies in the data and the ability to facilitate agent interactions, rather than in the traditional UI-driven model.