PaySimply is better than Plastiq on several grounds. While Plastiq only supports debit and credit card payments, PaySimply supports credit cards, Interac e-Transfers, PayPal, Alipay, debit card and cash payment at any Canada Post outlet. Furthermore, PaySimply charges between 1% to 2.5% for credit card payments and between $3.95 to $7.95 for debit card and cash payments. On the other hand, Plastiq charges 2.85% for credit cards and $1 for debit card payments. In addition, PaySimply makes tax payments easy with web and mobile app access. Plastiq is only accessible on its website as of the time of writing this PaySimply review.