After first using Paypal when I started and then Stripe for the last 8 years, I recently moved over to Stax Payments for credit card processing. You may want to consider an integration with them since they don't charge as much as Stripe. Stripe has raised their prices for recurring billing so it's about 3.5% per transaction or the industry average 2.9% for one offs. Stax does a monthly membership based on volume and charges 1.9% per transaction for recurring and one offs. I would look into integrating with it since it will probably save Searchie clients money in credit card transaction fees. Just wanted to share since I'm happy with them.