[masraum]

I have used Zelle a bunch of times. A "con" of Zelle is that you've got to setup a transfer to a person either using a mobile number or email address that I believe they have to setup and register. It doesn't seem like a great option for an established business like yours. And once you've sent the money, it's gone. So don't have a typo that goes to some random real person or you've just gifted them some money.

I've heard about Venmo, but I don't know anything about it and haven't used it.
I think there's something similar to Zelle at Chase.

I would be avoiding paypal as well.

Have you asked your bank, "Is there a way through you to send/receive money electronically that doesn't have an additional cost associated with it?"

That's probably your best first step.