Stripe charges a typical % of the transaction (as all credit card companies do.). Visit Stripe for more pricing info. Credit cards transactions are 2.9% + 30¢ per transaction for cards that are manually entered or 2.7% + 5¢ for swiped cards (using the Stripe card reader), while bank transfers are only 0.8%.
Stripe makes it very easy and fast it is to sign up. You can start processing payments immediately after creating a Stripe account. With Stripe, there are no contracts, monthly minimums, setup fees, or any other fees of any type tacked on top of the rates mentioned above.