You know a platform or tech is successful when it becomes a verb. A payments app owned by PayPal joined the ranks of Google and FedEx(at least in verbal usage) a few years ago when millennials began "Venmo-ing" each other to settle bar tabs.
Mobile peer-to-peer payments now include Square, Apple Pay Cash and Google Pay, among others. Less than a year ago, Zelle entered the space and quickly became a huge player.
One reason for its success: Zelle is not a standalone app, like Venmo. Instead, it integrates with a user’s existing banking app.