We do offer Monthly and Yearly subscription options on all plans.
If you'd like to review your renewal term, please visit the Subscription page. In the screenshot below, you will see the account is at the Professional subscription level and configured for monthly billing.
To modify the above example to Yearly, you would click the "Pay Yearly" option. (If you are already on Yearly and wish to change to Monthly, this will say "Pay Monthly.)
If you have any questions, please contact us.