Case Study: Rain achieves safer releases and legacy system migration with Flagsmith

Feature Flags to Meet Customer Needs and Migrate Users from Legacy Systems

Rain, a fintech platform providing early wage access to employees, faced the challenge of managing multiple daily releases to production while ensuring stability and responding quickly to customer needs across different geographic markets. They needed a robust solution to control feature rollouts and migrate users from legacy systems without disruption. This led them to adopt feature flags using Flagsmith.

Flagsmith provided the feature management platform that enabled Rain to wrap new features in flags, allowing for controlled, phased rollouts to specific employers and regions. This was critically used to migrate all users from their legacy loan management system to a new platform within six months. The solution ensured 100% uptime during the migration, supported the simultaneous operation of both old and new systems, and allowed Rain to monitor business metrics effectively. Flagsmith's reliability and low latency were essential for Rain's transaction-heavy, revenue-critical environment.

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Rain