Align Commerce Corp.’s use of bitcoin is invisible and almost irrelevant to its business customers. And that’s how the startup wants to keep it.

The San Francisco company, which is announcing today that it has raised a $12.5 million Series A round led by Kleiner Perkins Caufield & Byers, is one of an emerging class of bitcoin-based companies that rely on the digital currency behind the scenes. It’s being used as a tool to provide an improved financial service--in Align’s case that’s cross-border payments for small businesses.

...