Authorize.Net Authorize.Net has a $99 setup fee, costs $20 per month and takes a $0.10 per-transaction fee. PayPal PayPal takes 2.9% + $0.30 per transaction and has no setup or monthly fees Google Checkout Google Checkout fees start at 2.9% + $0.30 per transaction for sales less than $3,000. The percentage they take goes down depending on monthly sales volume. Amazon Payments Amazon Payments fees start at 2.9% + $0.30 per transaction for payments over $10 (the percentage they take is less for larger transactions). For payments under $10, the fee is 5.0% + $0.05 per transaction. Dwolla There are no fees for transactions less than $10. For transactions over $10, Dwolla charges $0.25 per transaction. Stripe Stripe charges 2.9% + $0.30 per transaction with no setup or monthly fees. Braintree There are no set-up or monthly fees. Transaction fees are 2.9% + $0.30 per transaction for qualified cards. Samurai by FeeFighters For their gateway/merchant solution, Samurai takes 2.3% of all sales volume, costs $25 per month and charges a $0.30 fee per transaction. WePay WePay charges a 3.5% transaction fee (with a $0.50 minimum) for credit card transactions and $0.50 for bank payments, with no setup or monthly costs. 2Checkout 2checkout charges 3.99%, a $0.45 transaction fee and $10.99 monthly service fee.