Payment.Ninja offers Free Trial, but PaySimple does not.
PaySimple is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Payment.Ninja is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for PaySimple Starts at $59.95/Month whereas for Payment.Ninja Starts at $29/Month.
Some top alternatives to PaySimple includes Stripe Payments, WePay, Square Payments, SuperPay, Paystand, Better Payment, SwipeSimple, PayNet and PayApp.
Some top alternatives to Payment.Ninja includes PayPal Here, Braintree Direct, MagicPay, PayAnywhere, Invoice Ninja, Paymill, Cardknox, SwipeSimple and ScanPay.