Neither Whistle nor PaySimple offers a free trial.
Whistle is designed for Large Enterprises, Medium Business and Small Business.
PaySimple is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of PaySimple begins at $59.95/Month, while pricing details for Whistle are unavailable.
Some top alternatives to Whistle includes WePay, MagicPay, TransNational Payments, PaySimple, SuperPay, Better Payment, SwipeSimple, Paytiko, PayApp and Payment Record Online.
Some top alternatives to PaySimple includes Stripe Payments, WePay, Square Payments, SuperPay, Paystand, Better Payment, SwipeSimple, PayNet and PayApp.