Bilt, a housing and neighborhood commerce network, faced challenges in choosing a CIAM (Customer Identity and Access Management) solution that met its requirements for scalability, security, and affordability. The company needed a solution that could serve millions of users, deploy to Google Cloud Engine (GCE), integrate with their CI/CD pipeline, and keep all data within the Google Cloud environment. After evaluating options, Bilt found that many pure multi-tenant SaaS CIAM solutions lacked robust features or met security posture requirements but were too rigid in deployment options. Cost predictability was another sticking point, as most solutions used billing models that became unpredictable with growth. Bilt ultimately chose FusionAuth for its flexibility, performance, and affordability, which allowed them to scale on-demand, maintain operational sovereignty, and integrate seamlessly into their CI/CD pipeline. With FusionAuth, Bilt has been able to handle millions of users without issues, while maintaining predictable costs and direct access to expert support.