Lumin Digital raised $70M entirely from its own customers.

Finextra reports the cloud-native core banking platform closed over $70 million sourced from existing client institutions rather than VCs. Customer-funded rounds in infrastructure are rare and signal deep switching-cost lock-in: the banks are buying an ownership stake in a vendor they can't leave. Structurally more interesting than the headline number. If your customers want equity, you've either built something essential or something they're scared will disappear.