Knowify offers Free Trial, but PaySimple does not.
PaySimple is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Knowify is designed for Large Enterprises, Medium Business and Small Business.
Pricing for PaySimple Starts at $59.95/Month whereas for Knowify Starts at $149/Month when Billed Yearly.
Some top alternatives to PaySimple includes Stripe Payments, WePay, Square Payments, SuperPay, Paystand, Better Payment, SwipeSimple, PayNet and PayApp.
Some top alternatives to Knowify includes Procore, UDA ConstructionOnline, Contractor's Office, Contractor's Cloud, Buildertrend, Corecon, CoConstruct, iCore and Remato.