Firms looking to bring stablecoins and other cryptocurrencies into the payments mainstream are working a variety of angles, as illustrated by news on multiple fronts that emerged early Tuesday.

Convera USA LLC, a business-to-business payments platform and provider of foreign-exchange services, announced it will work with Ripple Labs Inc. to develop and offer payment and treasury technologies for businesses. Seattle-based Convera says it is hearing clients express interest in digital currencies but felt a need to seek out a partner. “Ripple is a natural fit for Convera,” Patrick Gautheir, the company’s chief executive, said in a statement.

Ripple, known for its blockchain technology developed to support…