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Case Study

SEIU Drives Massive Membership Growth and Significant Legislative Impact with Upland Mobile Commons

The Service Employees International Union needed a way to reach and activate members at scale without depending on email open rates or phone banking capacity. By building its mobile engagement program on Upland Mobile Commons, SEIU developed one of the largest and most effective union SMS programs in the country, using text-based communication to drive new member sign-ups, coordinate rapid-response advocacy campaigns, and connect members to legislative moments in real time. This case study details how SEIU built its subscriber base, what message strategies drove the highest action rates, and how the organization measured the direct relationship between its mobile engagement program and both membership growth and legislative outcomes.