You can pay online using a credit card or PayPal. Choose to be billed in your local currency (USD, EUR, GBP etc).
Change or cancel your plan at any time. You'll always have an account size that is suitable for you.
Setting up can take as little as 2 minutes. Simply adjust the SMTP settings in your email program or web app.
Help is at hand via live chat and email if any setup or integration issues ever arise.