Yes, you can. By default, if you cancel your subscription, your personal data will be anonymized from your account after 180 days (the time period where you can reactivate your account without losing any unused credits).
If you have an existing subscription, you will have to cancel it first. If you still have remaining credits in your account, note that these credits will be forfeited when you request to be deleted or anonymized. You can request to delete or anonymize your data by writing to us at hello@writetext.ai.