You can cancel your Similarweb subscription at any time from within the Account Settings section of the Similarweb platform.
Find the Settings icon in the bottom left corner of the page and click Account.
Go to Subscription Information.
Click Cancel Subscription.
Once you cancel your subscription, it will stay active until the end of your subscription period. It will then automatically complete the cancelation when your subscription period ends.
Note: If you are a free user, you can delete your free Similarweb account by following the steps here: How do I delete my free account?