|Warning: Cancelling a Pingdom account is immediate and it will be removed after following these instructions.|
To cancel your Pingdom account simply log in to my Pingdom and go to Settings > Subscription (where, surprisingly, all subscription related things are handled).
Based on your account type there'll be a few different options:
Paid plans (Starter, Standard, Advanced, Professional and Enterprise) will have to click the MANAGE PLAN button.
Free plans will have a link at the bottom of the subscriptions page:
Once again, cancelling will immediately delete the account after the short exit survey. There is unfortunately no automatic way to stop your monthly/yearly renewal, but get in touch and we'll sort it out!