Payment processing

Visa, which was criticized for its vague explanation of a June 1 outage in Europe, was in the process of installing better technology, but the project was not complete at the time of the incident and won't be finished until the end of this year.

Payment processors have increasingly become full-service providers from equipment to security measures and, most recently, some mobile and omnichannel options.

London-based TransferWise's business model has been to undercut traditional banks’ foreign transfer fees, and the company's marketing has long emphasized its role as a plucky rival to banks — going so far as to invoke a comparison to Robin Hood. But the company's offering can also benefit the banks that see value in making peace with an upstart.

Western companies desperately want a chunk of China's vast domestic consumer payments market, though they may find themselves feeling lucky to be left out.

Longtime Starbucks boss Howard Schultz was so invested in the company's mobile payments strategy that he once stepped down from his day-to-day duties to focus his full attention on the tech initiative. Without his involvement, will Starbucks lose its edge in fintech?