Yes, both ChargeKeep and Payvoice offer a Free Trial.
ChargeKeep is designed for and undefined.
Payvoice is designed for Medium Business and Small Business.
Pricing for ChargeKeep Starts at $16/Month when Billed Yearly whereas for Payvoice Starts at $49/Month.
Some top alternatives to ChargeKeep includes GoCardless, PayPal, Authorize.Net, UniPay Gateway, SuperPay, NETELLER, Convenient Payments, SwipeSimple and PayHere.
Some top alternatives to Payvoice includes Confluence, Chargebee, PayWhirl, Stripe Billing, Servicebot, Subill, Billsby, MightyDash, Pricewell and Subscribie.