By using payment providers you'll be able to provide online payment processing for your customers, to capture & manage your customers payments.
It's super easy to integrate these tools with folk, to automatically create new customers in folk once they have made a their first payment, or update existing ones!
Tools suggested
Stripe
Chargebee
Shopify
Paypal
Integration set up
Step 1: Trigger in Stripe (or other) - New payment
Step 2: Action in folk - Create Person