ChargeKeep offers Free Trial, but Authorize.Net does not.
ChargeKeep is designed for and undefined.
Authorize.Net is designed for Large Enterprises, Medium Business and Small Business.
Pricing for ChargeKeep Starts at $16/Month when Billed Yearly whereas for Authorize.Net Starts at $25/Month.
Some top alternatives to ChargeKeep includes GoCardless, PayPal, Authorize.Net, UniPay Gateway, SuperPay, NETELLER, Convenient Payments, SwipeSimple and PayHere.
Some top alternatives to Authorize.Net includes Stripe Payments, QuickBooks Payments, PayorCRM, UniPay Gateway, NETELLER, NextPay Payment Gateway, Airpay, Better Payment, aPay Payment Gateway Systems and PayNet.