Not hard, because DonorDock's team migrates your data for you, typically in under a week. You work with a real person to map your file, and contacts, gifts, activities, and pledges come over with their history. Subscriptions already in Stripe can be switched over without donors signing up again. Gifts on another processor can move through Stripe's own migration service if that processor releases the data. If not, donors restart on a DonorDock Giving Page.
The Help Center has step-by-step export guides for DonorPerfect, Bloomerang, Raiser's Edge, Neon, Little Green Light, and more. CancerGRACE, a cancer education nonprofit, reported saving over $3,500 a year after switching from DonorPerfect.