This seems to be the US equivalent to Solarisbank, which operates only in some EU countries. I don't know any specifics, but I have encountered Solaris a few times. For example they are used by TradeRepublic, basically the German Robinhood equivalent, and a handful of Neobank providers. Those Neobanks usually focus onto a specific niche and build their product based on the services offered by Solaris.

I would imagine that Column could provide similar their services to similar companies and make the development of financial products significantly faster.